Answer:
[tex]1s^2\, 2s^2[/tex].
Explanation:
Electron orbitals in an atom (e.g., [tex]1s[/tex]) are denoted with:
A number, denoting the shell (principal energy level) of this orbital, andA letter, denoting the shape of this orbital ([tex]s[/tex], [tex]p[/tex], [tex]d[/tex], etc.)
There are two aspects to consider when finding the electron configuration of an atom:
The number of electrons that each type of orbitals could hold, andThe order in which the orbitals are filled.The [tex]s[/tex] orbital in each shell could hold up to [tex]2 \times 1 = 2[/tex] electrons (one [tex]s\![/tex] orbital per shell, with up to two electrons.)
The [tex]p[/tex] orbitals in each shell could hold up to [tex]2 \times 3 = 6[/tex] electrons (three [tex]p\![/tex] orbitals per shell, with up to two electrons in each orbital.)
The [tex]d[/tex] orbitals in each main shell could hold up to [tex]2 \times 5 = 10[/tex] electrons (five [tex]d\![/tex] orbitals per shell, with up to two electrons in each orbital.)
Refer to the order in which the orbitals are filled (Aufbau principle.)
The first orbital to be filled would be [tex]1s[/tex] (the [tex]s[/tex] orbital of the first shell,) accommodating up to [tex]2[/tex] electrons.The second orbital to be filled would be [tex]2s[/tex] (the [tex]s[/tex] orbital of the second shell,) accommodating up to [tex]2[/tex] electrons.All four electrons of Beryllium are thus assigned to the [tex]1s[/tex] and [tex]2s[/tex] orbitals. In a ground-state Beryllium atom, orbitals [tex]2p[/tex] and beyond would contain no electrons.
Notation:
Two electrons in the [tex]1s[/tex] orbital: [tex]1s^{2}[/tex] (the superscript denotes the number of electrons in this orbital (or group of orbitals).)Two electrons in the [tex]2s[/tex] orbital: [tex]2s^2[/tex].Write the non-empty orbitals in the order by which they are filled:
[tex]1s^2\, 2s^2[/tex].
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The combinations would need roman numerals in the ionic name is aluminum and fluorine. Therefore, option D is correct.
What types of ionic compounds require Roman numerals ?It is necessary to specify the specific ion we are referring to because transition metals can generate many ions. The addition of a Roman numeral after the metal serves as a reminder of this. Both the charge and the oxidation state of the transition metal ion are indicated by the Roman numeral.
When the metal cation forms several ions, ionic compounds are named using Roman numerals. Although not all of them do it, transition metals are those that can combine with other ions to generate multiple ions.
Thus, option D is correct.
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ame the acid h3po4 (dissolved in water) phosphoric acid phosphorous acid hydrogen phosphate acid hydrophosphate acid hydrophosphoric acid
The name of [tex]H_{3} PO_{4}[/tex] is Phosphoric acid.
Phosphoric acid (orthophosphoric acid, mono-phosphoric acid, or phosphoric(V) acid) is an inorganic phosphorus-containing solid with the chemical formula [tex]H_{3} PO_{4}[/tex]. It is most commonly encountered in the form of an 85% aqueous solution, which is a colorless, odorless, non-volatile syrupy liquid. It is a significant industrial chemical that is found in many fertilizers.
The term "orthophosphoric acid" is used to differentiate this acid from other "phosphoric acids," such as pyrophosphoric acid. Nonetheless, the term "phosphoric acid" is frequently used to refer to this specific compound, and this is the current IUPAC nomenclature.
Food-grade phosphoric acid is used to acidify foods and beverages like colas and jams, giving them a tangy or sour flavour. Phosphoric acid is also used as a preservative. Soft drinks containing phosphoric acid, such as Coca-Cola, are sometimes referred to as phosphate sodas or phosphates. Soft drinks contain phosphoric acid, which has the potential to cause dental erosion.
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Bromine is one of the few elements that is a liquid at room temperature. It vaporizes easily and has a beautiful red color in both the liquid and gaseous states. Bromine reacts readily with hydrogen gas to make hydrogen bromide. One way to represent this equilibrium is 2 HBr(g)H2(g) + Br2(g) We could also write this reaction three other ways, listed below, The equilibrium constants for all of the reactions are related. Write the equilibrium constant for each new reaction in terms of K, the equilibrium constant for the reaction above 1) 1/2 H2(g) + 1/2 Br(g)HBr(g) K1 = _____________ 2) H2(g) + Br2(g) 2HBr(g) K2 = _____________ 3) HBr(g)1/2 H2(g) + 1/2 Br2(g) K3 = ___________
The equilibrium constant for three reaction are
K1=[tex](1/K)^{1/2}[/tex]K2=1/KK=[tex]K^{1/2}[/tex]What is equilibrium constant?
The relationship between the reactants and products when a chemical reaction reaches equilibrium is revealed by the equilibrium constant of a chemical process, which is typically represented by the letter K.
There are certain rules such as
When we reverse the reaction equilibrium constant becomes inverse and when multiply particular reaction using any number then that number raised to power of the equilibrium constant.
2HBr (g) ⇄ H₂ (g) + Br₂ (g)
[tex]K = \frac{[H_{2} ][Br_{2} ]}{[HBr]^{2} } \\\\[/tex]
[tex]\frac{1}{2} H_{2} (g) + \frac{1}{2} Br_{2} (g)[/tex] ⇄ HBr(g)
[tex]K1 = \frac{[HBr]}{[H_{2} ]^{1/2}[Br_{2} ]^{1/2} }[/tex]
Squaring on both sides,
[tex]K1^{2} = \frac{[HBr]^{2} }{[H_{2} ][Br_{2} ] }[/tex]
Putting value of K in above equation -
K1² = 1/K
K1 = (1/K)^(1/2)
2) H₂ (g) + Br₂ (g) ⇄ 2HBr (g)
Reverse the main equation
So, K₂ = 1/K
HBr (g) ⇄ 1/2 H₂ (g) + 1/2 Br₂ (g)
Multiplying equation by 1/2
So, K raised to the power 1/2,
K₃ = K^(1/2)
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The equilibrium constant for each new reaction in terms of K, will be K1 = (1/K)^1/2 ; K2 = 1/K ; K3 = K^1/2
Why is the equilibrium constant important?
The amount of reactant to product in a chemical reaction can be compared to derive the equilibrium constant, which is used to predict chemical behavior. Rate of the forward reaction equals Rate of the backward reaction at equilibrium.
For reaction, 2 HBr(g) ⇌ H2(g) + Br2(g)
Equilibrium constant K will be [H2] [ Br2] / [HBr]^2
1) 1/2 H2(g) + 1/2 Br(g) ⇌ HBr(g)
K1 =[HBr] / [H2]^1/2 [ Br2]^1/2
= (1/K)^1/2
2) H2(g) + Br2(g) ⇌ 2HBr(g)
K2 = [HBr]^2 / [H2] [ Br2]
= 1/K
3) HBr(g) ⇌ 1/2 H2(g) + 1/2 Br2(g)
K3 = [H2]^1/2 [ Br2]^1/2 / [HBr]
= K^1/2
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What causes the intensity of light to be lower in the winter and locations other than the equator
In the winter and in regions other than the equator, light intensity is reduced due to Earth's angle with the sun.
How does intensity of light change with latitude?The answer is related to how Earth is angled in relation to the sun. The equator's latitudes experience constant direct sunshine. The oblique angle at which latitudes near the poles receive sunlight causes the same quantity of radiation to be dispersed over a larger area than it would be at the equator.
It is the cause of change in seasons as-
In summers: There are longer daylight hours, the sun is more perpendicular to us than at other times of the year, and the Northern Hemisphere leans toward the sun in its revolution. The longer days bring up additional heating because of the concentrated sunshine.
In winters: The sun seems lower in the sky during the winter because the Northern Hemisphere is tilted away from it, there are less daylight hours, and the sun is hitting us at an angle. Because the sun's beams are "spread out" rather than "direct," there is less heating.
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_CH3CH2OH+_O2->_ CH2+_H2O
Balance Equation
The given combustion reaction of ethanol with oxygen can be balanced as follows:
[tex]\rm CH_{3}CH_{2} OH + 3O_{2} \rightarrow 2 CO_{2} + 3 H _{2}O[/tex].
What is combustion?Combustion is a type of reaction in which the a substance reacts with atmospheric oxygen to produce water and carbon dioxide. Hydrocarbons such as alkanes, alkenes and alkanes and other organic compounds such as alcohol.
One mole of ethanol undergoes combustion reaction and produce 2 moles of carbon dioxide and 3 moles of water. The reaction can be balanced and written as follows:
[tex]\rm CH_{3}CH_{2} OH + 3O_{2} \rightarrow 2 CO_{2} + 3 H _{2}O[/tex]
The reaction is balanced on each side and the number of each elements on both sides are equated by multiplying with suitable integers.
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The reaction _____ provides information about the individual steps of a reaction, and identifies any reaction _____, which are formed during one step and consumed in a subsequent step.
The reaction mechanism explains the separate phases of a reaction and identifies any intermediates that are produced during one step and used in a different step later in the reaction.
In chemistry, what does the term "reaction" mean?One or maybe more chemicals, commonly referred to as reaction mixture, are converted within one or more chemical molecules, referred to as products, during a chemical reaction. Chemical elements and compounds are both substances.
The term "response" refers to what?Rearranging the atoms or molecules of two or more substances when they come into touch with one another, producing the production of one or more new substances. The interaction of two different substances' electrons is what drives chemical reactions.
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Convert 6.75 CM toMM
Answer:
.675
Explanation:
when going down on the chart you move the decimal point to the left however many times you go down
In a second experiment, which is performed at a much higher temperature, a sample of ethanol gas and a
copper catalyst are placed in a rigid, empty 1.0 L flask. The temperature of the flask is held constant, and the
initial concentration of the ethanol gas is 0.0100 M. The ethanol begins to decompose according to the
chemical reaction represented below. CH3CH2OH(g) æCuæà CH3CHO(g) + H2(g)
The concentration of ethanol gas over time is used to create the three graphs below.
(c) Given that the reaction order is zero, one, or two, use the information in the graphs to respond to the
following
(i) Determine the order of the reaction with respect to ethanol. Justify your answer.
The order of the reaction is zero. The plot on the left is a straight 1 point is earned for the correct
line, indicating that the rate of decrease in [ethanol] is constant as choice with a valid justification. [ethanol] changes. Therefore the rate of reaction does not depend
on [ethanol].
(ii) Write the rate law for the reaction
(iii) Determine the rate constant for the reaction, including units
(d) The pressure in the flask at the beginning of the experiment is 0.40 atm. If the ethanol completely
decomposes, what is the final pressure in the flask?
Answer:
Hope this help you i try my best :)
The Order of the reaction is zero. The rate law for the reaction is rate = k[CH₃CH₂OH]⁰. The rate constant for the reaction is 4.0 x 10⁻⁶ Ms⁻¹. the final presure is 0.8 atm.
The order of the reaction is zero. The plot on tye left is a straight line, indicating that the rate is decreasing in[ ethanol] is constant as [ ethanol ] changes. Therefore the rate of the reaction does not depend on the[ethanol] because of the order of the reaction is zero the rate law for the reaction became rate = k[CH₃CH₂OH]⁰.
The rate constant can be calculate as follows:
rate = k = - Δ [ethanol] = - (0.0020-0.0100) mol/L
Δt 2000s
rate = 4.0 x 10⁻⁶ Ms⁻¹
The final pressure is 0.080 its twice the original pressure because the product represent twice as many moles of gas as reactant
your question is incomplete but most probably your full question attached below
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What is the ionic charge for the chromium ion in CrP3 ?
What is the ionic charge for the chromium ion in CrP³⁺
is +6.
What is the ionic charge of an element?The ionic charge of an ion of an element in a compound is the charge the element has in that compound, as a result of the number of electrons it has donated or gained.
Metallic elements in compounds have a positive charge because they donate electrons to electronegative elements.
Non-metals have a negative charge in compounds as they accept electrons from metals.
The ionic charge of chromium ion in the CrP³⁺ is calculated as follows:
P has a cherge of - 3
Cr + (-3) = + 3
Cr = +6
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What is esterification reaction?
According to my search
The primary alcohol is treated with a carboxylic acid in the presence of sulphuric acid a compound is formed. This compound has a sweet smell. The compound obtained is called an ester. The chemical reaction occurring in the formation of the ester is known as an esterification reaction.
Some esters can be prepared by esterification, a reaction in which a carboxylic acid and an alcohol, heated in the presence of a mineral acid catalyst, form an ester and water: The reaction is reversible. As a specific example of an esterification reaction, butyl acetate can be made from acetic acid and 1-butanol.
determine whether aqueous solutions of the following salts are acidic, basic, or neutral: (a) fecl3 (b) k2co3 (c) nh4br (d) kclo
A basic solution is one that contains a salt of a strong base and a weak acid. The solution is acidic because it contains a salt of strong acid and weak base.
A neural solution is one that contains the salts of a strong acid and a strong base.
The solutions NaCl,KBr are neutral, NaCN, NaNO 2 and KF are basic, and NH4 NO 3 is acidic.The pH scale is employed to ascertain whether a solution is acidic or basic. It has a number from 0 to 14, with 7 representing neutral. Any of it less than 7 is an acid, and anything greater than 7 is a base. The pH scale is a logarithmic scale, with a pH of 2 being 10 times more alkaline than a pH of 3. Because their pH is less than 7, acids such as HCl (the acid in ones tummy that aids digestion) and lemon juice are all amino acid (neutral). Water, for example, has a pH level of 7 when it is neutral. You are a base with a pH of 8-16 when you're dealing with a basic substance.
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Question 8 of 20:
Select the best answer for the question.
8. An example of an atom that has no charge is one that has
O A. 3 protons, 2 electrons, and 1 neutron.
O B. 3 protons, 1 electron, and 3 neutrons.
OC. 2 protons, 2 electrons, and 1 neutron.
O D. 1 proton, 2 electrons, and 3 neutrons.
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Answer:
C. 2 protons, 2 electrons, and 1 neutron.
Explanation:
An atom that has no charge is one that has an equal number of protons and electrons. Protons have a positive charge, while electrons have a negative charge, so an atom with an equal number of protons and electrons will have a net charge of zero.
Therefore, the correct answer is C: 2 protons, 2 electrons, and 1 neutron. This atom would have two positive charges (from the protons) and two negative charges (from the electrons), which cancel each other out, resulting in a neutral charge.
In 1989 during the World Series baseball championship in San Francisco, California,
an earthquake caused roads to collapse, buildings to catch on fire, and the ground to
roll. Which diagram correctly models the plate movement that caused the
earthquake?
The Loma Prieta earthquake rocked Northern California just before the start of Game 3 of the 1989 World Series. Therefore, the diagram accurately depicts convergent boundaries as the cause of the plate movement that led to the earthquake.
What are earthquakes explain?Despite the fact that tectonic plates are always moving slowly, friction makes their edges impenetrable. When the stress just on edge is greater than the friction, waves of energy are released, which travel through earth's crust & cause the shaking we feel. The earth's surface trembling is referred described as a "earthquake." The Earth's surface is trembling unexpectedly. Undoubtedly, earthquakes are a dreadful form of nature's devastation. Earthquakes can also significantly harm both people and property. There are certain weak Earthquakes that most likely go unreported.
What causes earthquakes?The unexpected fracturing of subsurface rock and quick movement across a fault are the usual causes of earthquakes. This sudden release of energy results in these seismic waves, that shake the ground.
Even though we cannot prevent natural earthquakes from occurring, we can significantly lessen their effects by identifying risks, building structures that are more earthquake-resistant, and spreading earthquake safety knowledge. Being ready for natural earthquakes can help us reduce the likelihood of earthquakes brought on by humans.
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How many electrons are needed when the following half-equation is balanced using the lowest possible whole numbers? no3 (aq) h (aq) - -> no(g)
The no. of electrons needed are 3 for the following half-equation is balanced using the lowest possible whole numbers is NO three− +4H + +e − →2H 2 O+NO.
The oxidation numbers for nitrogen has been assigned.
+5N O three− +4H + +e → 2H 2 O+ +2N O
This is a discount 1/2 of equation. All atoms are balanced.
We stability prices via way of means of including the proper quantity of electrons.
NO three− +4H + +3e − →2H 2 O+NO
This is a balanced discount 1/2 of-reaction.
Thus, the quantity of electrons required to stability the equation is three.
Hence, the best choice is 3 .
The balancing steps are proven below:Some nitrogen in nitrate anion is oxidized from +three to +five in nitrate anion.Oxidation 1/2 of-reaction: NO−2(aq)→NO−three(aq)+2e−2OH−(aq)+NO−2(aq)→NO−three(aq)+2e−2OH−(aq)+NO−2(aq)→NO−three(aq)+2e−+H2O(l).
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Which one of the following options give the correct procedure to calculate the mass of a substance if number of moles are given? A moles / molar mass B. molar mass /mole C none of them D. moles x molar mass
The answer is D. moles x molar mass.
How do we determine a substance's mass?
Number of moles divided by molecular weight equals the substance's mass.Since the question states that glucose has a molecular weight of 180.16, plugging in our calculations shows that we require 180.16 x 1.5 = 270.24 g of sugar.
What are the three methods for determining mass?There are numerous instruments available for determining mass in various settings.The utilization the gravitational interaction between things is one of them, along with balances and scales, measuring transducers, vibrating tubes sensors, Newtonian weight measurement devices, and balances and scales.
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Which of the following is the Arrhenius Theory of acids and bases? O An acid dissociates in water to form Hydrogen ions (H^+) and a base dissociates in water to produce Hydroxide ions (OH^-). O An acid is a proton donor and a base is a proton acceptor. O Acids are substances with a very high pH (greater than 10) and bases are substances with a very low pH (less than 3). O None of the above.
In water, a highly soluble sodium hydroxide compound dissociates to give sodium ion and hydroxide ion as an example of an Arrhenius base.
To enhance the concentration of hydroxide ions, NaOH entirely dissolves in aqueous solution to give hydroxide ion and sodium ion. The Arrhenius theory, proposed in 1887 by the Swedish scientist Svante Arrhenius, states that acids dissolve in water to produce electrically charged atoms or molecules known as ions, one of which is a hydrogen ion (H+), and that bases ionize in water to produce hydroxide ions (OH). As a result, water is a material that dissociates in water to create H+ ions. It also meets the definition of a material that dissociates in water to create OH ions.
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The positive ions carries a number of positive charges………..the number of given electrons
Answer:
less the number of electrons
Explanation:
electrons have a negative charge
2AgNO3(aq) +CaCl2(aq)--> 2AgCl(s) + Ca(NO3)2(aq) You have a 1.00 M solution of silver nitrate and a 0.100 M solution of calcium chloride. Following the above reaction, you react 25.00 mL of each solution. What is the theoretical yield of solid? (Note: MW of AgCl = 143.32 g/mol)
In balanced chemical reaction of silver nitrate and calcium chloride the amount of the 0.005 moles of silver chloride and 0.0025 moles of calcium nitrate.
In balanced chemical reaction
2AgNO₃(aq) + CaCl₂ (aq) ⇒ 2AgCl(s) + Ca(NO₃)₂(aq)
Given :
Silver nitrate = 1.00 M
Calcium chloride = 0.100 M
In a reaction 25 moles of each reactant is mixed.
Silver nitrate = 1.00 M x25 ml /1000
Silver nitrate moles in 25 ml = 0.025
Calcium chloride = 0.100 M x 25 ml/1000
calcium chloride moles in 25 ml = 0.0025
∵ 0.0025 ml of silver nitrate requires 0.0125 moles of calcium chloride. So limiting reagent is calcium chloride.
CaCl₂ ⇒ 2AgCl(s) + Ca(NO₃)₂
1 mole ⇒ 2 moles 1 moles
0.0025 ⇒ 0.005 0.0025
Hence, concentration of the product depend on the limiting reagent.
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Sixty milliliters of a particular liquid has a mass of 350g. What is its density?
Answer:
Once a density has been calculated the tool will also display two conversion scales for a range of mass and volume values
Explanation:
The density of this particular liquid is [tex]5833 kg/ m^3[/tex].
What is Density?Density is defined as mass per unit volume. It is a standard mechanical quantity. The most frequently used symbol for density is ρ (rho), D can also be used which is a Latin letter.
It can be expressed as
[tex]\rho ={\frac {m}{V}}\\\\\rho = density \\m = mass\\V = volume[/tex]
Density is expressed in [tex]kg/m^3[/tex] , mass in kg and volume in [tex]m^3[/tex]
For above given information,
Mass= 350 g= 0.350kg
Volume= 60ml = 0.00006 [tex]m^3[/tex] ([tex]1ml= 1/10^6 m^3[/tex])
So, Density= 0.350/0.00006 = [tex]5833 kg/m^3[/tex]
Thus, the density of this particular liquid is [tex]5833 kg/ m^3[/tex].
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The events describe the formation of an underwater sedimentary rock. Place the events in chronological order.
The proper numbering is 4, 2, 1, and 3.
The following sequence of actions can be used to describe how an undersea sedimentary rock is formed.
Sedimentary Rock
In a basin, sediments and animal skeletons start to accumulate.
The material that has been deposited starts to become bound together by a glue ingredient brought in by running water, such as calcite or clay. The deposits start to become harder.
The deposits eventually transform into rock that is solid and hard. The new rock is a mixture of several organic and inorganic components.
Existing rocks become sediments as a result of weathering.
What causes sedimentary rocks to form?
Sedimentary rocks are formed when previously existing rocks or pieces of extinct animals accumulate on the surface of the Earth. Sediment that has been buried deeply becomes compacted
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Burning 1.0 kg of anthracite coal releases 30,500 kJ of heat. Calculate the mass of coal required to heat 4.0 kg of water from 20ºC to its boiling point of 100ºC. (Specific heat capacity of water = 4.184 J/g°C)
A. 26.4 g
B. 112 g
C. 43.9 g
D. 37.1 g
E. 72.7 g
F. 16.2 g
Answer:
C. 43.9 g
Explanation:
The formula for calculating the heating of the water:
Q = m * C * ΔT
Where Q is the amount of heat required, m is the mass of the object, C is the specific heat capacity of the material, and ΔT is the change in temperature. Plugging in the values from the problem, we get the following:
Q = 4000 g * 4.184 J/g°C * (100°C - 20°C) = 1,338,880 J = 1338.88 kJ
The mass of anthracite coal required:
[tex]m_{coal}[/tex] = 1338.88 kJ / 30,500 kJ/kg = 0.0439 kg = 43.9 g
HIGH SCHOOL CHEMISTRY #8-15
PLEASE HELP!!
One mole of diatomic oxygen weighs 32 grams and it contains 6.02 × 10²³ oxygen molecules. Similarly 55 grams of Fe contains 6.02 × 10²³ Fe atoms.
One mole or 27 g of Al contains 6.02 × 10²³ molecules. Hence, 3 molecules of Al weighs 1.34 × 10⁻²² g. Similarly 4 molecules of Fe weighs 1.26 × 10⁻²² g.
What is Avogadro number?One mole of every substance contains 6.02 × 10²³ atoms or molecules. This number is called Avogadro number. Hence the mass of an element or molecule containing Avogadro number of atoms is called its molar mass or atomic mass of element.
The molar mass of O₂ = 32 g/mol
Hence, number of molecules in 32 g of oxygen gas = 6.02 × 10²³
The atomic mass of Fe = 55 g
Hence, the number of molecules = 6.02 × 10²³
One mole or 27 g of Al contains 6.02 × 10²³ molecules. Hence, mass of 3 molecules = (27 × 3 )/ 6.02 × 10²³ = 1.34 × 10⁻²² g
One mole or 19 g of F contains 6.02 × 10²³ molecules. Thus, mass of 4 molecules of F = (19 × 4)/ 6.02 × 10²³ = 1.26 × 10⁻²² g.
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a sample of nitrogen at a pressure of 1.00 atm and a temperature of 59.0 k is heated at constant pressure to a temperature of 129 k. which of the following are true?
Initially the sample will be in solid form and finally it will in gaseous form.
What is melting point ?
A substance's melting point is the temperature at which it transforms from a solid into a liquid. The equilibrium between the solid and liquid phases exists at the melting point. A substance's melting point is dependent on pressure, and it is typically expressed at a standard pressure such 1 atmosphere or 100 kPa.
Melting point of nitrogen =63.15K
Boiling point of nitrogen = 77.355K
Below 63.15K it is in solid form and above this it will be in liquid form.
Below 77.355K it is in liquid form and above this it will be in gaseous form.
Initially it is 59K means in solid form.
And finally it is 129K means in gaseous form.
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The sample will first take on a solid form before transitioning to gaseous form.
What do melting and boiling points mean?
The temperature at which a substance's solid and liquid phases are in equilibrium is known as its melting point. The temperature at which a substance's vapour pressure equals the atmospheric pressure is known as the boiling point of that material.
Physical and chemical changes can cause matter to transform into different forms, but no matter what happens, matter is always conserved. There is no creation or destruction of matter; the amount of matter is the same before and after the transformation. The Law of Conservation of Mass is the name given to this idea.
Nitrogen's melting point is 63.15 K and its boiling point is 77.355K. It is solid at temperatures below 63.15K and liquid at temperatures beyond this. It has a liquid state below 77.355K and a gaseous state above this.
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Select the best answer for the question.
5. Which of the following accurately describes circuits?
OA. In a parallel circuit, the same amount of current flows through each part c
OB. In a series circuit, the current can flow through only one path from start to
OC. In a parallel circuit, there's only one path for the current to travel.
OD. In a series circuit, the amount of current passing through each part of the
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The statement accurately describes circuits is in a parallel circuit, there's only one path for the current to travel. Therefore, option C is correct.
What is circuit ?Electronic components such as resistors, transistors, capacitors, inductors, and diodes are connected via conductive wires or traces that allow electric current to pass between them.
Circuit training entails performing a set of timed exercises one after the other, with varied lengths of break in between. Push-ups, sit-ups, squats, chin-ups, and lunges are a few exercises that might be included in a straightforward circuit training routine.
A channel for the transfer of electric current is known as an electric circuit. Electric energy is transferred to components that transform it into various types of energy that can perform work, such as supplying power to lights, appliances, and other devices, when electrical current flows across a circuit.
Thus, option C is correct.
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Indicate whether the following balanced equations involve oxidation-reduction. If they do, identify the elements that undergo changes in oxidation number.
(a)PBr3(l) +3H2O(l)=H3PO3(aq) + 3HBr(aq)
(b)NaI(aq) + 3HOCl(aq)=NaIO3(aq) + HCl(aq)
(c)3SO2(g) + 2HNO3(aq) + 2H2O(l)=3H2SO4(aq) + 2NO(g)
(d) 2H2SO4(aq) + 2NaBr(s)=Br2(l) + SO2(g) + Na2SO4(aq) + 2H2O(l)
The oxidation-reduction process is present in each of the responses to this question. Redox reaction is another name for it. See down for more details
What is an oxidative reaction?It is known as the process in which oxidation and reduction happen at the same time. Both the oxidation and reduction processes proceed simultaneously. While electrons are obtained during a reduction reaction, they are lost during an oxidation reaction. (a) This process is an oxidation-reduction reaction because bromine's oxidation state moves from (-1) to (0), demonstrating oxidation, and sulfur's, from (+6) to (+4), demonstrating reduction. (b) Because nitrogen moves from (+5) to (+2), indicating reduction, and sulfur changes form (+4) to (+6), indicating oxidation, this reaction involves both oxidation and reduction.(c) (c) The change in the oxidation states of iodine from (-1) to (+5), which indicates oxidation, and chlorine from (+5) to (-1), which indicates reduction, indicates that this process involves oxidation-reduction. (d) Because the element is present on both the reactant and product sides, this reaction does not involve an oxidation-reduction reaction.
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How much heat must be removed from 0.000010 kg of steam at 100 degrees Celsius to get ice at -273 degrees celsius.
Answer:
The amount of heat that must be removed from steam at 100 degrees Celsius to get ice at -273 degrees Celsius can be calculated using the formula for the heat of fusion of water. The heat of fusion of water is approximately 333.55 joules per gram, which means that it takes 333.55 joules of energy to convert 1 gram of liquid water at 0 degrees Celsius to 1 gram of ice at 0 degrees Celsius.
To convert 0.000010 kg of steam at 100 degrees Celsius to ice at -273 degrees Celsius, we must first convert the steam to liquid water at 100 degrees Celsius, which requires the addition of heat. The heat required to do this can be calculated using the specific heat capacity of water, which is approximately 4.186 joules per gram per degree Celsius. The specific heat capacity tells us how much heat is required to raise the temperature of 1 gram of a substance by 1 degree Celsius.
To convert 0.000010 kg of steam at 100 degrees Celsius to liquid water at 100 degrees Celsius, we would need to add (0.000010 kg) * (100 degrees Celsius) * (4.186 joules/gram/degree Celsius) = 0.004186 joules of heat.
Once the steam has been converted to liquid water, we can then convert the water to ice at -273 degrees Celsius. To do this, we would need to remove (0.000010 kg) * (333.55 joules/gram) = 0.033355 joules of heat.
In total, we would need to remove 0.004186 joules + 0.033355 joules = 0.037541 joules of heat from 0.000010 kg of steam at 100 degrees Celsius to get ice at -273 degrees Celsius.
Explanation:
Describe how to prepare 400 grams of a 15% (mass/mass) aqueous solution of KBr.
Dissolve 60g of potassium bromide in 340g of water to produce 15% (mass/mass) aqueous solution of potassium bromide.
Here we have to prepare a total of 400 g of solution. Aqueous solution means the solvent we use here is water.
So to prepare 400 g of 15% aqueous solution of potassium bromide, we need to find out how many grams of potassium bromide need to be dissolved in water and how many grams of water must be used.
Here the weight percent is given, that is 15%
15/100 = weight of potassium bromide/ 400 g
0 .15 = weight of potassium bromide / 400
weight of potassium bromide needed = 0.15 × 400
= 60 g
So, we calculated the required amount of potassium bromide as 60 grams. The total weight of the solution to be made is 400 grams.
So amount of water required = 400 - 60
= 340 g
So we need to mix 60 grams of potassium bromide in 340 grams of water to get a 15% (mass/mass) aqueous solution.
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The distance from the sun to jupiter is 778,000 000km. How long does it take for light from the sun to jupiter?
2.6×10³Seconds is the time taken by the light to cover the distance from sun to Jupiter.
Time= distance ÷speed
Time=?
Distance= 778,000 000 kilometre
Speed of light is= 3×10⁸
Converting the 778,000 000 kilometre into metre
Since we know that 1 kilometre = 1000 meter
So we will multiply 1000 to the given value 778,000 000 kilometre
So the answered will be,
= 778,000 000,000 meter
Now we can write this value as,
= 778 × 10⁹ meter
Also, = 7.78 × 10¹¹ meter
Now we are putting the values into the above formula that is,
Time= 7.78 × 10¹¹ ÷ 3×10⁸
Time= 2.6 × 10³ Seconds
Jupiter: Jupiter is the fifth planet from the Sun and is the biggest planet in the Solar System. It is a gas giant with a mass just below one thousandth that of the Sun but greater than 2.5 times that of all the other planets combined in the Solar System.
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If the percent (mass/mass) for a solute is 4% akd the mass of the solute is 200g, what is the mass of the solute in the solution?
Answer:
To find the mass of the solute in the solution, we first need to convert the percent to a decimal by dividing by 100. Since the percent is 4%, we can divide by 100 to get 0.04.
Next, we can multiply the decimal value by the total mass of the solute to find the mass of the solute in the solution. In this case, the total mass of the solute is 200g, so we can multiply 0.04 by 200g to get:
0.04 * 200g = 8g
Therefore, the mass of the solute in the solution is 8g.
A 25 mL sample of 0.1M NH3 is titrated with 0.1M HCl.
Calculate the pH values of the solution after the volumes of 0.1M HCl are added. 0.00mL,5.00mL,10.00mL,15.00mL,20.00mL,22.00mL,24.00mL,25.00mL and 26.00mL.
You are dealing with a neutralization reaction that takes place between acetic acid,
CH
3
COOH
, a weak acid, and sodium hydroxide,
NaOH
, a strong base.
Now, the pH of the resulting solution will depend on whether or not the neutralization is complete or not.
If the neutralization is not complete, more specifically if the acid is not completely neutralized, you will have a buffer solution that will contain acetic acid and its conjugate base, the acetate anion..
It's important to note that at complete neutralization, the pH of the solution will not be equal to
7
. Even if you neutralize the weak acid completely, the solution will be left with its conjugate base, which is why you can expect its pH to be greater than
7
.
So, the balanced chemical equation for this reaction is
5.35