The mass of the substance would be 72.8g
Given,
The density of the substance = 9.1g/cm³
The Length of the substance = 2cm
The Breadth of the substance = 2cm
The Hight of the substance = 2cm
We know,
Mass = Density × Volume
And
Volume = l×b×h
= 2×2×2
= 8 cm³
Therefore the mass of the substance
= D×V
= (9.1 × 8) g
= 72.8g
So, the mass of a substance will be 72.8g
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for the reaction co(g) h2o(g) <--> co2(g) h2(g) calculate the equilibrium concentrations of all species if 1.000 mol of each reactant is mixed in a 1.000l flask. kc
The equilibrium concentration [tex]k_{c}[/tex] = 0.57.
What is equilibrium concentration?Equilibrium is when the rate of the forward reaction equals the rate of the reverse reaction. All reactant and product concentrations are constant at equilibrium.
Given reaction:
co(g) + [tex]H_{2}o[/tex] <--> [tex]co_{2}[/tex](g) + [tex]H_{2}[/tex](g)
co = 1 mole
[tex]H_{2}o[/tex] = 1 mole
[tex]H_{2}[/tex] = 0.43 mole
Each reactant is mixed in a 1 liter flask.
equilibrium concentration = ?
Equilibrium amount:
co = 1 - 0.43 = 0.57 mole
[tex]H_{2}o[/tex] = 1 - 0.43 = 0.57 mole
[tex]co_{2}[/tex] = 0 + 0.43 = 0.43 mole
[tex]H_{2}[/tex] = 0 + 0.43 = 0.43 mole
Then, equilibrium concentration
co = 0.57/1 liter = 0.57 mole
[tex]H_{2}o[/tex] = 0.57/1 lite r= 0.57 mole
[tex]co_{2}[/tex] = 0.43/1 liter= 0.43 mole
[tex]H_{2}[/tex] = 0.57/1 liter = 0.57 mole
[tex]k_{c} = \frac{[H_{2} ][co_{2} ]}{[H_{2}0 ][co]}[/tex]
[tex]K_{c} = \frac{0.43.0.43}{0.57.0.57}[/tex]
[tex]k_{c}[/tex] = 0.57
Hence, The equilibrium concentration [tex]k_{c}[/tex] = 0.57.
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A 5.0 Amp current is passed through a solution of copper (II) sulfate for four hours. How many grams of copper could form on the cathode during this process?
The amount of copper that would be deposited on the cathode during the process is 47.75 g.
What is the amount of copper (II) deposited?
The amount of copper (II) deposited is calculated as follows;
CuSO² ⇄ Cu²⁺ + SO₄²⁻
Cu²⁺ + 2e⁻ → Cu
.
From the oxidation reaction above, we can infer that,
2F -----------> 64 g of copper (Cu)
where;
F is Faraday = 96500 CThe quantity of charge passed through the solution of copper (II) sulfate for four hours is calculated as follows;
Q = It
where;
I is the currentt is the time of current flowQ = (5 A) x (4 hrs x 3600 s/hr)
Q = (5 A) x (14,400 s)
Q = 72,000 C
The amount of copper that will be deposited by this quantity of charge is calculated as follows;
96500 C --------> 64 g
72,000 C ---------> ?
= (72,000 X 64) / 96500
= 47.75 g
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pentacarbonyliron (fe(co)5) reacts with phosphorous trifluoride (pf3) and hydrogen, releasing carbon monoxide: fe(co)5 2pf3 h2 → fe(co)2(pf3)2(h)2 3co the reaction of 5.0 mol of fe(co)5, 8.0 mol of pf3 and 6.0 mol of h2 will release mol of co.
Fe(CO)₅ is the limiting reactant given the provided statement since it has the lowest ratio.
What defines a limiting reactant?The quantity of product that can be created is constrained by the reagent that is used first in a chemical reaction, also referred to as the limiting reactant (or limiting reagent).
Briefing:Calculating the moles supplied/moles stoich ratio will reveal the limiting reactant, which is the one with the lowest value.
Fe(CO)₅ ratio = [5 g / 195.9 g/mol] / 1
Fe(CO)⁵ ratio = 0.025
PF3 ratio = [8 g / 87.97 g/mol] / 2
PF3 ratio = 0.045
H2 ratio = [6 g / 2 g/mol] / 1
H2 ratio = 3
We can see that Fe(CO)5 has the lowest ratio, so it is the limiting reactant.
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A one paragraph summary of 5 sentences of how petroleum forms. Which must include the following terms:
-Sea
-organisms
-pressure
-high temperatures
-petroleum
-sediments
-sedimentary rock
-seafloor
-millions of years
please underline the words I just showed: pays 30
Petroleum is a fossil fuel that was formed from sediments of plants and animals left over millions of years through the transformation of dead organisms that are buried under the sea and seafloors such as algae, plants, and bacteria, that experienced high temperature and pressure when trapped inside rock formations such as the sedimentary rocks.
What is petroleum?Petroleum, also referred to as crude oil, is a naturally occurring liquid found beneath the earth’s surface which can be refined into fuel.
Petroleum is a fossil fuel that is created by the decomposition of organic matter over time and used as fuel to power vehicles, heating units, and machines, and can be converted into plastics.
Petroleum is mostly recovered through oil drilling and then refined and separated into different types of fuels. Petroleum contains hydrocarbons of different molecular weights. The petroleum has a property of the denser the petroleum the more difficult it is to process and the less valuable it is.
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Which one of the following is NOT equal to 1 mole?
6.02 x 1023 atoms of carbon
6.02 x 1023 molecules of oxygen
14.0 grams of nitrogen
26.0 grams of calcium
The compound that is not equal to 1 mole is 26 grams of calcium
A mole of a compound contains 6.02 x 10^{23} atoms.
6.02 x 10^{23} atoms of carbon = 1 mole
6.02 x 10^{23} molecules of oxygen = 1 mole
No. of moles = Atomic mass / Molar mass
No. of moles of nitrogen = 14 / 14 = 1 mole
14.0 grams of nitrogen = 1 mole
No. of moles of calcium = 26 / 40
26.0 grams of calcium = Not equal to 1 mole
Thus, the compound that is not equal to 1 mole is 26 grams of calcium
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2
SIEMSCOPedia: PATTERNS IN THE PERIOD
What Do You Know?
The Periodic Table of Elements is arranged based on the properties of elements The orant belov
lists five elements. For each element, find a "matching" element in the box below the chart. A
matching element is one that is in either the same group or the same period as the e ement in the
chart. Then, write whether the elements are in the same group or the same period. Finally, write
east two characteristics that are shared by the matching elements based on their locations on th
Periodic Table. You will need to refer to a Periodic Table to complete this activity.
Element
Matching Element
Matching Group or
Period?
Shared
Characteristics
Hydrogen, Scandium , Lanthanum, Aluminium, Helium are the five elements we will discuss the periodic framework.
What is an element and what are the matching elements of the above mentioned elements?Element as we know is the fundamental block of inorganic chemistry, also when we study organic chemistry but is belonging to the inorganic section more.Its the smallest unit of compound. Here we picked an example of Hydrogen firstly , whose matching element is Lithium as they both belong to same group and the similarity between them is that they both share same electronic configuration when it comes to belonging to same group.The second example we picked is Scandium which is d block element and its matching element is titanium , both belong to same group.Scandium and titanium both have extraordinary oxidation properties.The third example we picked is Aluminium , whose matching element is Boron as both belongs to group 13 and the similarity between them is that they both are good conductor of electric.To know more about periodic table visit:
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The important discovery from Rutherford’s gold foil experiment was that _______________.
Group of answer choices
alpha particles pass through gold un-deflected because of the small size of the atom.
alpha particles are dense
electrons are not attracted to positively charged alpha particles.
the volume occupied by an atom is largely empty space.
The important discovery from Rutherford’s gold foil experiment was that the volume occupied by an atom is largely empty space.
What is an experiment?An experiment can be described as a procedure carried out to support or refute a hypothesis, or determine the efficacy or likelihood of something previously untried.
Rutherford's model was the first to introduce the concept of an atomic nucleus. This novel idea accounted for the sparse distribution of electric charges that was revealed in Rutherford's famous gold foil experiment.
Rutherford in his experiment shot a beam of alpha particles at a sheet of gold foil, where some of these particles were deflected.
That accounted for the theory that the volume occupied by an atom is largely empty space.
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Do you think everything in the solar system revolves around the sun?
Answer:
everything in OUR solar system revolves around the sun
Explanation:
the sun is the only star in our solar systen
Answer: Everything in our solar system revolves around the sun
Explanation: everything in our milky way revolves around the sun but in other solar systems it does not because that is a completely different solar system with most likely a different sun so yes in OUR solar system
Almost all of an atom's mass is found in its nucleus, located in the center of the atom. An atom's nucleus can contain two types of particles: protons and neutrons. The nucleus of every atom contains one or more protons. Each proton has a positive electrical charge. In many atoms, the nucleus also contains neutrons. A neutron has no electrical charge. Determine whether each statement is true or false to complete the table.
Almost all of an atom's mass is found in its nucleus, located in the center of the atom an atom's nucleus can contain two types of particles: protons and neutrons the nucleus of every atom contains one or more protons each proton has a positive electrical charge. In many atoms, the nucleus also contains neutrons a neutron has no electrical charge all the statements are true
Protons are positively charged, neutrons are uncharged and electrons are negatively charged the negative charge of one electron balances the positive charge of one proton and both protons and neutrons have a mass of 1, while electrons have almost no mass
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I just did it in IXL
When reported to the correct number of significant digits, the product of 0.01200 and 45.9 is?
The correct number of significant digits, the product of 0.01200 and 45.9 is the right answer 0.5508.
The above number has only one significant digit because if there is a zero before the decimal point only the non-zero digits after the decimal point are significant digits. Three rules are used to determine the number of significant digits Non-zero numbers are always valid. All zeros between two significant digits are valid. Only trailing zeros or trailing zeros in the fractional part are significant.
Rounds a number to three significant digits the same way it rounds to 3 decimal places. Count up to 3 digits from the first non-zero digit. Then round off the last digit. Pad the remaining digits to the right of the decimal point with zeros. All zeros between two non-zero digits are valid. For example, 10,007 has 5 significant digits. If the zeros are both to the right of the decimal point and to the left of the non-zero digits, they don't matter.
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What does the sun supply to a leaf?
starch
water
light energy
gas
The sun provides energy to the leaves through photosynthesis. It converts the sun's rays into sugar and provides energy to the leaves.
When sunlight hits the leaves packets of light called photons bounce off the chlorophyll molecules. In doing so it knocks electrons out of orbits around the magnesium atom. Electrons have a negative charge, so the loss of an electron produces a positively charged magnesium ion. Plants absorb energy from the sun through a process called photosynthesis to power processes necessary for survival.
Harvest the sun's energy with the help of chlorophyll in the cells of the leaves. Chlorophyll captures and packs energy from the sun's light in a process called photosynthesis. Leaves usually have a large surface area to maximize sunlight. Photosynthesis is the process by which plants use sunlight, water, and carbon dioxide to produce oxygen and energy in the form of sugars. The more light a plant is exposed to, the less chlorophyll it synthesizes.
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A student adds 10 ice cubes to a large beaker filled with 400 mL of water. Which of the following
best describes the contents of the beaker?
A pure substance
B heterogeneous mixture of a pure substance
C homogeneous solution of two substances
D solution of two pure substances
Ответ:ответ
.Объяснение:т.к вода это одно вещество и лёд тоже делают из
21. Write a conclusion, using the fimulation and
graph. Use what you have learned in this activity to support the following two statemer
How the molecules in a solid, liquid and gas compare to each other.
How temperature relates to the kinetic energy of molecules.
The interatomic bond or interaction defines the real attraction or repulsion between the molecules in whatever state may the solid, liquid, or gas.
What is temperature and molecular interaction?
As we have already learned it a lot of times about temperature , it is the measure of degree of hotness or coldness.Temperature is the measure of the degree of hotness or coldness , whatever may the degree is.There are various units of temperature used like celsius, farhenhite etc.See the interaction inside the matter is not so critical , as in solid the interaction is tight , the molecules are close to each other.In liquids molecules are loosely interacted , and in the gas molecules are at the peak of repulsion.The temperature in the matter is directly related to kinetic energy, in the context that higher the temperature the higher the kinetic energy.To know more about temperature visit:
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Circle the correct word: Protons and neutrons contribute (mass or volume) to the atom.
Answer:
mass
Explanation:
Protons and neutrons contribute mass to the atom.
A researcher grew a plant in an illuminated chamber with 18o-radiolabeled co2. After allowing time for photosynthesis, where will the radiolabeled 18o be found?.
The plant's glucose, C6H12O6, will include the 18O-radiolabeled CO2 when enough time has passed for photosynthesis. Option D
How does photosynthesis work?Green plants use the power of sunshine to produce their nourishment via a process called photosynthesis.
In the process of photosynthesis, plants use the energy of the sun to drive chemical processes that transform atmospheric carbon dioxide, or CO2, and water vapor into glucose.
Taking into account the provided research:
In an illuminated room with 18O-radiolabeled CO2, a researcher cultivated a plant.
The 18O-radiolabeled CO2 will be absorbed into the glucose the plant produces during photosynthesis when enough time has passed for photosynthesis.
After being generated, glucose is subsequently stored as starch.
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Complete question:
A researcher grew a plant in an illuminated chamber with ¹⁸O-radiolabeled CO₂. After allowing time for photosynthesis, where will the radiolabeled ¹⁸O be found?
A. O₂ in the chamber
B. H₂O in the plant
C. H₂O vapor in the chamber
D. C₆H₁₂O₆ in the plant
In the common naming convention for carboxylic acids, what is the correct greek letter used for the carbon adjacent to the carboxyl group?.
The correct Greek letter used for the carbon adjacent to carboxyl group is alpha (α).
What is carboxylic acid?
Any of a group of organic compounds known as carboxylic acids in which a carbon (C) atom forms a double bond with an oxygen (O) atom and a single bond with a hydroxyl group (OH). The carbon atom is connected to a hydrogen (H) atom or another univalent combining group by a fourth bond. The carbonyl group (C=O) and hydroxyl group are what give the carboxyl (COOH) group its name. The acidity of the carboxylic acids is one‘s primary chemical characteristic. They are typically weaker than the well-known mineral acids but generally more acidic than other organic compounds with hydroxyl groups (e.g., hydrochloric acid, HCl, sulfuric acid, H2SO4, etc.).
Greek letter used for the carbon adjacent to the carboxyl group is Alpha.
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Based on their location in the Periodic Table, which of the following pairs of elements would react with water in a similar way because they are in the same group and family?
A) Na, CI
B) Si, As
C) K, Rb
D) Cs, Ba
Lucia is playing with magnetic toy vehicles. She has two identical toy vehicles (purple and pink) that start on opposite sides of a center magnet that cannot move. She moves both vehicles one space closer to the center magnet.
How did the potential energy of the two vehicles change? Did the potential energy of one vehicle change more than the other? Why do you think so?
The change in the potential energy of the cars would be the same since they started moving from the same position.
What is potential energy?The potential energy is the energy that is possessed by a body by virtue of its position. We know that when we move the object from one point to the other, the potential energy of the object would vary.
Now we have Lucia has two identical toy vehicles (purple and pink) that start on opposite sides of a center magnet that cannot move. She moves both vehicles one space closer to the center magnet. Let us note that the potential energy would begin to change as the cars begin to move from one point to another.
We have to note that the positions of the vehicles are the same and this would imply that the changes in the potential energy of the vehicles would be the same.
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a sample of an unknown gas effuses in 10.7 min. an equal volume of h2 in the same apparatus under the same conditions effuses in 2.42 min. what is the molar mass of the unknown gas?
Molar mass of the unknown gas= 39.09 g / mol
T= TIME
MW= MOLAR MASS
MW H₂ = 2
now, Apply graham law--
graham law states that rate of effusion of a gas is inversely proportional to square root of the molar mass of its particle.
Rate1/rate2 = √(MW2/MW1)
T2/T1 =√(MW2/MW1) (BECAUSE, VOLUME EQUAL)
(10.7/2.42)²= MW2/2
MW2=molar mass of the unknown gas = 2α×(10.7/2.42)²
=39.09 g / mol
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The solution to 1.56 x 65.3211 should have ____ significant figures
The solution to 1.56 x 65.3211 should have 9 significant figures
This is further explained below.
What are significant figures?Generally, The digits of a number that are dependable and essential to convey the amount of anything are referred to as the number's significant figures when the number is written using positional notation.
Generally, the equation for the expression is mathematically given as
E=1.56 x 65.3211
Therefore
E=1.56*65.3211
E=101.900916
The answer to 1.56 multiplied by 65.3211 need to have nine significant numbers.
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the conversion of malate to oxaloacetate in the citric acid cycle takes place with the conversion of nad to nadh. in this reaction, nad is a(n) and is to nadh.
In the citric acid cycle, the conversion of NAD to NADH triggers the conversion of malate to oxaloacetate. NAD is a(n) reduced to NADH, the oxidizing agent, in this process.
What is an oxidizing agent?In a redox chemical process, an oxidizing agent is a material that obtains or "accepts" or "receives" an electron from reducing agent (also known as an oxidant, oxidizer, electron recipient, or electron acceptor) (called reductant, reducer, or electron donor). So then every substance that oxidizes another substance is an oxidant. By saying that the oxidizers "undergo reduction" and "are reduced" while reducers "undergo oxidation" and "are oxidized," it can be indicated that the oxidizer's oxidation state, which characterizes the degree of the electron loss, falls while the reductant's increases. Oxygen, hydrogen peroxide, and halogens are the frequently used oxidizing agents.
An oxidizing agent is a chemical species that goes through a chemical reaction in which it obtains one or more electrons, to put it simply. It is a part of an oxidation-reduction (redox) reaction in that sense. An oxidizing agent, in the second sense, is a chemical species that donates electronegative atoms, often oxygen, to a substrate. Atom-transfer reactions are found in many explosives, combustion, and organic redox reactions.
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Potassium is an element in group 1 of the periodic table and so it forms __________ ions. Give one word, not symbols or numbers.
Potassium is an element in group 1 of the periodic table and so it forms positive ions
A Potassium atom acquires a charge of +1 to enter its noble gas electron configuration that's why it is found in group 1 of the periodic table of the elements and it is called as K⁺ ion and K⁺ ions have 1 less electron than K atoms
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A compound of carbon and hydrogen and oxygen (ethylene glycol- antifreeze) is determined to be 38. 7% C, 51. 6% O, and 9. 7% H. Calculate the molecular formula of the molar mass is 62 g/mol
The molecular formula of the given is 0.519.
Equation :To calculate the molecular formula we need a simple formula,
molecular formula = divide the molecular mass / empirical formula
So, the known are
molecular mass = 62 g/mol
empirical formula = CH₃O
C = 38. 7%
H = 9. 7%
O = 51. 6%
empirical formula = 38. 7% + (9. 7% x 3) + 51. 6%
empirical formula = 119.4
Now, putting the values in formula
molecular formula = molecular mass / empirical formula
molecular formula = 62 g/mol / 119.4
molecular formula = 0.519
Hence, the molecular formula is 0.519.
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what is the formula for aqueous sodium hydrogen carbonate reactions with aquesous acetic acid to form liquid water, gaseous cabon dixoide and aqueous sodium acetate metal reacts with solid iron(lll) oxide to form solid iron and solid aluminum oxidexide with aqueous magnesium chloride to form soild magnesium hydroxide snf potassium chloride
The balanced reaction equations for the described reactions are given below. The first reaction is a combination of a double displacement and a decomposition reaction, the second one represents single displacement reactions, and the third one is multiple double displacements.
The balanced reaction equation (including a double displacement and a decomposition) between aqueous sodium hydrogen carbonate and aqueous acetic acid (resulting in the formation of liquid water, gaseous carbon dioxide, and aqueous sodium acetate) looks like this:
NaHCO₃(aq) + AcOH(aq) → CO₂(g) + H₂O(l) + NaOAc(aq)
The balanced reaction equation between aluminum metal and iron(III) oxide (resulting in the formation of iron metal and aluminum oxide) looks like this:
2Al(s) + Fe₂O₃(s) → 2Fe(s) + Al₂O₃(s)
The balanced reaction equation between solid potassium oxide with aqueous magnesium chloride (resulting in the formation of solid magnesium hydroxide and aqueous potassium chloride) looks like this:
K₂O(s) + H₂O(l) + MgCl₂(aq) → Mg(OH)₂(s) + 2KCl(aq)
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Please help as much as you can!! Most accurate answer will get brainlist and my heart
Based on the graph of mass against volume;
1. the mass of a sample of galena would be 22.5 g if it has a volume of 3.0 cm³
2. the volume of a sample of galena would be 4.00 cm³ if it has a mass of 30.0 g
3. the relationship between the mass and volume as shown by the graph is that the mass of the galena sample is directly proportional to the volume of the sample.
4. the density of Sample 2 compared to that of Sample 4 is the same.
5. the density of the largest sample (5) compare to the smallest sample (1) is the same.
6. the effect of sample size on the density of a material is that the density of a sample is independent of the mass.
What is the relationship between the mass and volume of a sample of known density?The mass and the volume of a sample of known density are directly proportional.
This means that the mass increases with the volume and vice versa.
Considering the given graph, the density of the galena sample is constant ad the volume increases as the mass increases.
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What would happen if three types of water
are placed in the same container?
an approximate partition function for a dense gas is given by where and are constants that are independently determined from molecular parameters. calculate (a) the thermal equation of state, (b) the energy , and (c) constant volume specific heat for this gas. d) finally, show that (these results correspond to the van der waals equation of state which approximates effects due to intermolecular interactions) .
As the values of these constants become closer to zero, the ideal gas law PV=nRT and the van der Waals equation of state get closer. For the intermolecular forces, the constant a serves as a correction. The value of constant b, which corrects for finite molecular size, is the volume of one mole of atoms or molecules.
The perfect gas equation, P = RT, is the most often used thermal equation of state. The fact that all gases can be liquefied serves as the finest illustration of its limitation for genuine fluids. The fluid's critical point is determined by the greatest temperature at which liquid and vapour may coexist.
The state equation for a van der Waal's gas is (P+n2aV2)(Vnb)=nRT. U=CTn2aV describes the internal energy's variation.
Since the pressure is predicted to be a linear function of temperature by the van der Waals equation, (CV / V)T = 0 and CV is independent of gas volume. Because the van der Waals gas acts like an ideal gas at very high volumes, its heat capacity is equivalent to that of an ideal gas.
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e. Which group on the periodic table has the largest number of elements? Hint the answer is not metals or nonmetals it’s more specific
Group on the periodic table has the largest number of elements is group 3
The periodic table is a tabular array of the chemical elements organized by atomic number from the element with the lowest atomic number, hydrogen, to the element with the highest atomic number and the atomic number of an element is the number of protons in the nucleus of an atom of that element
Group 3 which comes under transition metals is the longest group consisting 32 elements and it contains lanthanide means 57 to 71 and actinide series means 89 to 103 and this comes under f block family
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2. A 1kg book falls on the floor when sitting at the height of 4m how much kinetic energy
does the book have?
The object's potential energy is highest at the height from which it is dropped. Its potential energy diminishes while its kinetic energy grows as it descends.
PE = 1 kg
g = 9.8 m/s2
h = 100 m PE =? J m
PE = 1 kg 9.8 m/s2 = 980 kg•m2/s2 = 980 J
Is kinetic energy affected by height?In contrast to potential energy, an object's kinetic energy is related to other fixed and moving objects in its immediate environment. For example, if the object is positioned at a larger height, its kinetic energy will be greater.
According to its mass and beginning height, an item carried at a specific height above the ground has an initial potential energy (PE). When the thing is released, the velocity of the object rises as it falls. This increase in velocity increases the object's kinetic energy (KE).
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A typical car battery in a car is filled with a solution of sulferic acid, which is approximately 39.9% sulfuric acid. If the density of this
solution is 1.3 g/mL, determine the number of grams present in 500.0mL of battery solution.
This tells you that the reaction will always consume 2 times more moles of lithium hydroxide than moles of sulfuric acid.
Explanation of Sulfuric Acid?The balanced chemical equation can be used to help you figure out how many moles of each reactant must be present in solution in order for complete neutralization to occur when it comes to neutralization reactionH2SO4(aq]+ 2LiOH(aq]→ Li2SO4(aq]+ 2H2O(l]Lithium hydroxide and sulfuric acid have a 2 mole ratio. You can infer from this that the reaction will always consume.Lithium hydroxide has twice the moles of sulfuric acid.
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