Answer:
0.1 mole
Explanation:
According to the formula, 1 mol of CaCO3 will require 2 mol of HCl
Molar mass of CaCO3 = 40.08 + 12.01 + 3(16.00) = 100.09 g/mol
so the 5g of CaCO3 equals : 5g x (1 mol/100.09g) = 0.0499 or 0.05 mol
so the mole of HCl required is: 0.05 x 2 = 0.1 mol
1. What is the charge of an atom with 20 protons and 18 electrons
.Which of the following elements would increase in size when it became an ion?
A Indium
B Lead
C Mercury
D Selenium
Answer: Selenium
Explanation: Selenium is a non metal
WHAT IS THE CHEMICAL FORMULA FOR inorganic benzene
Answer: B3N3H6
Explanation:
I am pretty sure the formula for benzene is B3N3H6. If I am wrong, I am sorry, I learned this a long time ago.
A given sample of n2 gas has a pressure of 0. 30 atm at 30. 0 °c. If the volume is 2. 0 l, how many moles of n2 are present?.
0.0781 mol of N2 would be there at a pressure of 0.3atm at 30°C
How does Avogadro's number help you discover moles?Avogadro's number can be used to convert between molecules and moles by multiplying or dividing: The amount of moles must be multiplied by 6.02 x 1023 to convert to molecules. Divide the number of molecules by 6.02 x 1023 to convert it to moles.
How to find number of moles?At STP defined as 0°C (273.15 K, 32°F) and 1 atm, the molar volume of a gas is 22.414 L/mol.
Use dimensional analysis to calculate the moles of nitrogen in 1.75 L at STP.
1.75 L N₂ × 1 mol/22.414 L = 0.0781 mol N₂ to three 2 significant figures.
How much is a mole?A mole is 6.02214076 x 1023 of any chemical unit, including atoms, molecules, ions, and others. Due to the large number of atoms, molecules, or other components that make up any substance, the mole is a useful unit to use.
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explain how a specific amino acid is joined to its appropriate trna; describe the energy source that drives this endergonic process.
Each aminoacyl-tRNA synthetase's active site fits a certain amino acid and its associated tRNA like a "lock and key." The amino acid is subsequently joined to the tRNA using ATP.
What is endergonic process?
A reaction in which energy is absorbed is referred to as an endergonic reaction. In terms of chemistry, this indicates that the net change in free energy is positive, meaning that the system has more energy at the conclusion of the reaction than it did at the start.Endergonic reactions require a gain in energy, therefore for the reaction to take place, the energy needs to come from somewhere else.Because most endergonic reactions use ATP, DNA and RNA production is interesting because it does not. As you may remember, the four bases of DNA are A, T, C, and G. Adenosine is represented by the "A" base pair, same like it is in ATP.ATP is one of the components used in DNA synthesis, as opposed to being used and then replenished. Trisphosphates of the base pairs ATP, TTP, CTP, and GTP are the first compounds used in the procedure.One of the nucleotide's phosphate groups separates when DNA polymerase positions one of these nucleotide triphosphates to attach to the expanding DNA strand; this is replaced by the establishment of a new bond between the nucleotide and the DNA strand.Hence lock and key model is used
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for each value of the principal quantum number n, what are the possible values of the electron spin quantum number ms ? (there may be more than one correct choice.)
There can be no zero for the main quantum number (n). Therefore, the permitted values for n are 1, 2, 3, 4, and so forth. Any integer between 0 and n – 1 can serve as the angular quantum number (l).
How is the n quantum number determined?The value of n is between 1 and the outermost electron shell of that atom. Looking at the period (numbered row) of the element on the periodic table will reveal the primary quantum number. The period number and the primary quantum numbers of electrons in the S-block and P-block are identical.
There are three values if n=3 is the primary quantum number. The electron is in a p-orbital state when l=1, and the electron.
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explain the pauli exclusion principle and what it means for the nine electrons in an atom of fluorine. you do not need to write out all 9 sets of quantum numbers for fluorine.
Along with the Aufbau principle and Hund's rule, the Pauli Exclusion principle is one of the key concepts governing the arrangement of electrons in an atom.
According to the Pauli exclusion principle, no two electrons may simultaneously hold the same set of quantum numbers or quantum states. A distinct quantum number and set of quantum states should exist for every electron.We learned from the definition of the Pauli exclusion principle that no two electrons with the same spin can be placed together at once, and no two electrons with the opposite spin can be ordered in a single quantum state. The Pauli exclusion principle is just as significant in chemistry as it is in physics.
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A 2000 ml sample of water was collected and found to have 0.004 mL of oxygen. This is equivalent to?
The sample of water containing 0.004 ml of oxygen in 2000 ml of water is equivalent to 2× 10⁻⁴ volume percentage of the solution.
What is volume percentage?Volume percentage of an aqueous solution is the ratio of the volume of the dissolved substance to the total volume of the solution. Volume percentage is thus, used to express the concentration of the solution in terms of its volume.
The other terms used to express the concentration of a solution are molarity, normality, mass percentage, ppm etc.
Given the total volume of the water sample = 2000 ml
volume of oxygen dissolved in water = 0.004 ml
volume percentage = volume of oxygen / total volume ×100
= 0.004 /2000 ×100 = 2× 10⁻⁴
Therefore, 2000 ml water sample containing 0.004 ml of sample is equivalent to 2× 10⁻⁴ volume percentage.
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what mass of sodium phosphate is required to prepare 250.0 ml of a solution that is 0.30 m in sodium ion?
4.1g of sodium phosphate is required to prepare 250.0 ml of a solution that is 0.30 m in sodium ion.
The important thing to note here is that each mole of trisodium phosphate ([tex]Na_{3}PO_{4}[/tex]) gives us 3 moles of Na ions. So a solution that is 0.30 M in sodium ion is only 0.10 M in [tex]Na_{3}PO_{4}[/tex].
Now, molarity is moles/L, so we can figure out the total number of moles we need:
0.10 mol/L × 0.250 L = 0.025 moles [tex]Na_{3}PO_{4}[/tex].
Finally, the MW of [tex]Na_{3}PO_{4}[/tex] = 164 g/mol.
So: 0.025 moles × 164 g/mol = 4.1 g
So you would need 4.1 g of trisodium phosphate to make 250 mL of this solution.
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What is the name of the ion represented by the following
symbol? 02-
a oxygen ion
b dioxide
Coxide
d none of the above
Please do a half page report on Mauna Loa Volcano ‼️‼️
Explanation:
MAUNA LOA (VNUM #332020)
19°28'30" N 155°36'29" W, Summit Elevation 13681 ft (4170 m)
Current Volcano Alert Level: WARNING
Current Aviation Color Code: ORANGE
The Northeast Rift Zone eruption of Mauna Loa continues. One active fissure, fissure 3, is feeding a lava flow downslope.
Fissure 3 is generating a lava flow traveling to the north toward the Daniel K. Inouye Highway (Saddle Road) that has reached relatively flatter ground and slowed down significantly over the past several days, as expected.
As of 12 p.m. today, December 4, the flow front was about 2.25 mi (3.6 km) from the Daniel K. Inouye Highway (Saddle Road). Where the fissure 3 lava channel is branching, on the steeper slopes of the Northeast flank about half way down the lava flow, there were several small overflows recorded over the past day. During the past 24 hours, the lava flow advanced at an average rate of about 40 feet per hour (12 meters per hour). Though the advance rate has slowed over the past several days, the lava flow remains active with a continuous supply from the fissure 3 vent.
Advance rates may be highly variable over the coming days and weeks. On the flat ground between Mauna Loa and Mauna Kea, lava flows advance more slowly, spread out, and inflate. Individual lobes may advance quickly, and then stall. Additional breakouts may occur if lava channels get blocked upslope. There are many variables at play and both the direction and timing of flow advances are expected to change over periods of hours to days, making it difficult to estimate when or if the flow will impact Daniel K. Inouye Highway.
Sulfur dioxide (SO2) emission rates of approximately 180,000 tonnes per day (t/d) were measured on December 1, 2022 and remain elevated at this time. Volcanic gas is rising high and vertically into the atmosphere before being blown to the west at high altitude, generating vog (volcanic air pollution) in areas downwind. The International Volcanic Health Hazard Network has detailed information about
ans fast plss i have due in 2 hours
refer the pic above for answer
PLS ANSWER ASAP
How are natural resources managed for maximum usability and sustainability?
Match the general type of chemical reaction to the example that best fits it.
A. Na + cl2 -> NaCl
B. H2O -> H2 + O2
C. C6H12O6 + O2 -> H2O + CO2 + energy
D. Al(OH)3 + Li -> LiOH + Al
E. HCl + NaOH -> NaCl + H2O
__Combustion reaction
__ Single replacement
__Double replacement
__Synthesis
__Decompostion
The classifications of the reactions are;
A . Synthesis
B. Decomposition
C. Combustion reaction
D. Single replacement
E. Double replacement
What is the type of reaction?We know that in chemistry, what we call a reaction has to do with the interaction that is taking lace between two or more substances and leads to the production of a new substances. We have to look at the reacts that are here and then know how to classify each one.
In fact the combustion reaction has to do with the burning of a species in air. A single replacement has to do with the substitution of a given specie in a compound with another. A double replacement reaction has to do with a case where the anions interchange cation partners. The synthesis reaction deals with the production of new compounds while the decomposition reaction has to do with the compound into its components.
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Consider these two electron configurations for neutral atoms l and m. L - 1s22s22p63s2 m - 1s22s22p63s13p1 what is the atomic number of l 10 12 1 6.
The atomic number will be 12 and the element is magnesium.
What is electronic configuration?
Also called electronic structure ,it is the arrangement of electrons in orbits around the nucleus. The electron configuration of atoms in quantum mechanical models is given by ordering the occupied orbitals in order of packing, with the number of electrons in each orbital indicated as a superscript.
What is atomic number?
The atomic number, or atomic number of a chemical element, is the number of electric charges in the nucleus. For normal atomic nuclei, this equals the number of protons, or the number of protons found in the nucleus of each atom of that element.
Therefore, the atomic number will be 12 and the element is magnesium.
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which type of building material can produce toxic gases and rapidly deteriorate under fire conditions?
Engineered wood products type of building material can be highly combustible and produce toxic gases when exposed to fire.
Its construction materials exhibit a variety of flaws and stone degradation patterns, including color fading, spalling, and flaking.
Materials comprised of wood fibers connected by glue or binders may be extremely flammable, release hazardous fumes, or degrade quickly when exposed to fire. Building firewalls involves using walls.
In North America, wood is the most widely used building material and the foundation of many different structural systems. Wood's response to fire conditions is influenced by its size and moisture content.
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carbon monoxide gas is collected at in an evacuated flask with a measured volume of . when all the gas has been collected, the pressure in the flask is measured to be . calculate the mass and number of moles of carbon monoxide gas that were collected. round your answer to significant digits.
Number of moles of carbon monoxide gas that were collected is 0.585 mol and the mass of carbon monoxide gas is 25.7 g
In an evacuated flask with a measured volume of 30.0L, carbon dioxide gas is collected at a temperature of 27.0 °C. The pressure within the flask is 0.480atm once all the gas has been collected.
Determine the volume and moles of the carbon dioxide gas that was gathered. Make sure you have the right number of significant digits in your response.
T = 27.0°C ˖ 273.15 = 300.2 K
V = 30.0 L
P = 0.480 atm
n = ?
m = ?
Determine the number of moles of CO₂
The ideal gas equation can be used to determine the moles of CO₂.
P×V = n×R×T
n= (P×V)/(R×T) = (0.480×30.0)/(0.08206×300.2) = 0.585 mol
Calculate the CO₂ mass.
The molar mass is calculated to be 44.01 g/mol.
0.585 × 44.01 = 25.7 g
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calculate the rf value for a spot in a chromatography experiment if the solvent moved 14.2 cm and the spot moved 9.9 cm from the origin.
Rf will be 0.697
Retention factor can be defined as;
The ratio of distance travelled by substance to the distance travelled by solvent. Substances start at the origin. The starting point of the compound is called the origin. This is where we measure the distance moved by the substance.
According to the question;
The given data is:
spot distance = 9.9 cm
solvent distance = 14.2 cm
We will have to find the retention factor value:
Rf = ?
The formula to find Rf is as follows;
Rf = spot distance / solvent distance
Rf = 9.9 cm / 14.2 cm
The answer after the solution is :
Rf = 0.697
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write and balance the chemical equation for the reaction associated with the heat of formation for agno3
The balanced chemical equation for the reaction associated with the heat of formation for [tex]AgNO_{3}[/tex]
Decomposition is a type of chemical reaction when a single reactant breaks down into two or more different products. The term "thermal decomposition process" refers to the decomposition method used when heat is present.
The enthalpy change that takes place when 1 mole of a substance is created from its component elements in their standard states is known as the standard enthalpy of formation. A pure element has a standard enthalpy of production of 0 in its normal state.
Enthalpy of formation = Enthalpy change 1 mole of product formed from its original constituents.
[tex]Ag(s) + \frac{1}{2} N_{2}(g) + \frac{3}{2}O_{2} \rightarrow AgNO_{3}[/tex]
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Balance the equation:
SO₂ +
Li₂Se →
SS₂ +
Li₂O
Answer:
Explanation:
english please
What can a person do to limit exposure to x-rays?wear sunblockavoid cigarette smokewear a protective vestavoid chemicals.
X-rays are a form of indirectly ionizing radiation, and it can be really harmful to the humans health, so limiting the exposure is always a priority. Here, wearing a protective vest is the correct answer.
X-rays are a type of radiation that ionizes indirectly. Remember that ionization is what harms our cells, thus it is best to minimize exposure to these radiation types.
Now when X-rays are strong enough, they can penetrate through many ordinary materials (like wood, plastic, etc.) Also, once it enters in your body, a series of responses begin that cannot be stopped by outside forces.
Therefore, you should try to minimize your exposure. If possible, avoid being close to an X-ray source, but if that's not possible, use radiation protection.
Depending on the application, it can come in many shapes. For example, you can use LED screens to block out the fluence (flux of photons) that is focused at you. By placing these screens between you and the source, you can significantly reduce this fluence.
The same is true with protective vests that shield you from photons by absorbing them. These vests can include parts made of lead or other high atomic number materials.
So, a person can wearing a protective vest to limit exposure to X-rays.
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The cell potential of an electrochemical cell with the cell reaction 2al(s) + 3zn2+(aq) → 3zn(s) + 2al3+(aq) is 1. 607 v. What is the maximum electrical work obtainable from this cell when 0. 50 g of al is consumed?
The cell potential of an electrochemical cell with the cell reaction is 1. 607 v. the maximum electrical work obtainable from this cell when 0. 50 g of al is consumed is - 9.3 × 10⁵ J.
The reaction is given as :
2Al + 3Zn²⁺ ----> 3Zn + 2Al³⁺
the maximum electrical work obtainable from this cell:
ΔG = - n FE°cell
where,
maximum electrical work = ΔG
n = no. of transfer electron = 2 × 3 = 6 e⁻
E°cell = 1.607 V
ΔG = - n FE°cell
ΔG = - 6 × 9.65 × 10⁴ × 1.607
ΔG = - 9.3 × 10⁵ J
Thus the maximum electrical work obtain from this cell is - 9.3 × 10⁵ J.
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Which of these describes a way in which humans could increase biodiversity in a marine ecosystem?
A. Fish populations increase as dissolved oxygen decreases.
B. Data that shows how trees get affected by disease as levels of acid rain increases.
C. Data showing how forests grow when acidic precipitation decreases.
The statement that describes a way in which humans could increase biodiversity in a marine ecosystem is as follows: Fish populations increase as dissolved oxygen decreases (option A).
What is biodiversity?Biodiversity is the diversity (number and variety of species) of plant and animal life within a region.
It can be used more specifically to refer to all of the species in one region or ecosystem. Biodiversity refers to every living thing, including plants, bacteria, animals, and humans.
Marine ecosystem are aquatic environments with high levels of dissolved salt. These include the open ocean, the deep-sea ocean, and coastal marine ecosystems, each of which has different physical and biological characteristics.
The biodiversity of a marine ecosystem can be illustrated by the increase in fish populations in the marine environment, hence, option A is correct.
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a steel tank contains 40.0 g of n2, 50.0 g of o2, and 10.0 g of he gases at a total pressure of 8.0 atm. what is the partial pressure (in atm) of he in the tank?
The partial pressure of He in the tank when total pressure is given is calculated as : 3.649 atm.
What is partial pressure?When a container is filled with more than one gas, then each gas exerts pressure. So , the pressure of any one gas within the container is called its partial pressure.
Given 40 g of N2 ; 50 gm of O2 and 10 g of He
Total pressure given 8 atm
Moles of O2 = 50/32
=1.56 moles
Moles of N2 = 40/28
= 1.42 moles
Moles of He = 10/4
= 2.5 moles
Total number of moles= 1.56 + 1.42 + 2.5
= 5.48 moles
= (2.5/5.48) * 8
Partial pressure of He =3.649 atm.
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use the fiagram below to answer the following questions: a list the phase changes a sample of ice would go through if heated to its critical temperature and 1 atm pressure
(a) what is the total random kinetic energy of all the molecules in one mole of hydrogen at a temperature of 300 k? (b) with what speed would a mole of hydrogen have to move so that the kinetic energy of the mass as a whole would be equal to the total random kinetic energy of its molecules?
Total random kinetic energy of all the molecules in one mole of hydrogen at temperature of 300 K is 3741.3 J. Speed with which a mole of hydrogen have to move so that kinetic energy of the mass is equal to the total random kinetic energy of its molecules is 7482.6 m/s
What is kinetic energy of gas molecule?According to kinetic theory, average kinetic energy of gas molecules depends on the absolute temperature. At given temperature, molecules of all the gases have same average kinetic energy".
Kinetic energy = 3/2 * R T
= 3/2 * 8.314 * 300
= 3741.3 J
KE = 1/2 * m v²
v² = 2 KE/m
= 2* 3741.3 /1
Speed = 7482.6 m/s
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Help me please I beg me
which of the following is a neutralization reaction? question 15 options: cao h2o --> ca(oh)2 co2 h2o --> h2co3 hno3 koh --> kno3 h2o 2 na cl2 --> 2 nacl
This reaction is neutralization reaction.
2HNO3+2KOH⇒ 2KNO3+2H2O
What is neutralization reaction?
A neutralization reaction is a type of chemical reaction in which an acid and a base react with one another to form a salt and water. The acid and the base each donate one or more protons (H+ ions) to form a neutral compound. This type of reaction is important in many everyday applications, from the neutralization of stomach acid to the processing of industrial waste.
Acid+Base⇒Salt+Water
The given reaction is neutralization reaction because potassium nitrate salt is formed, and water is produced.
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What is this called??
Calculate the kinetic energy of the cart at the point shown below. It has a mass of 225 kg, is 10 m high, and is moving at a velocity of 2 m/s.
Average kinetic energy is the average sum of all kinetic energy of all the molecules of gases. Therefore, the kinetic energy of the cart is 450J. Average kinetic energy is directly proportional to temperature.
What is kinetic energy?
It is a energy which is possess by a moving object. It is very difficult to find the correct value of kinetic energy so we find average kinetic energy. Which is very easy to calculate as compared to calculating kinetic energy. It is not dependent on the type of gases or mass of gases.
Mathematically,
K.E=1/2mv²
Where,
m= mass of object= 225 kg
v= velocity of object= 2 m/s
substituting all the given values in the above equation, we get
K.E=1/2×225 ×2²
K.E=450J
Therefore, the kinetic energy of the cart is 450J.
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