What is the mass of 2.90 ×1022 molecules of NaOH (Molar mass = 40.0 g/mol)?

Answers

Answer 1

Answer: 40.0 g ( 1 mole ) --------------- 6.02x10²³ molecules
? ? --------------------------- 2.90x10²² molecules

mass = 2.90x10²² * 40.0 / 6.02x10²³

mass = 1.16x10²⁴ / 6.02x10²³

mass = 1.9269 g

hope this helps!

Related Questions

NEED HELP AS SOON AS POSSIBLE!7. How many atoms are present in a 6.00 g sample of silver? a. 1.07 x 10^-1 atoms b. 6.47 x 10^2 atoms c. 3.35 x 10^22 atoms d. 3.61 x 10^24 atoms 8. How many atoms are present in 2.0 x 10^6 mol of carbon? a. 3.3 x 10^-18 atoms b. 4.0 x 10^-17 atoms c. 1.0 x 10^29 atoms d. 1.2 x 10^30 atoms 9. what mass is present in sample of AgNO3 containing 3.14 x 10^19 formula units? a. 5.21 x 10^-5 g b. 8.86 x 10^-3 g c. 1.13 x 10^2 g d. 1.92 x 10^4 g 10. How many molecules are present in 36.6 L of SO2 gas at STP? a. 1.36 x 10^-21 molecules b. 1.63 x 10^0 molecules c. 1.54 x 10^22 molecules d. 9.84 x 10^23 molecules
The bright-red color of highway safety flares comes from strontium ions in salts such as Sr(NO3)2 and SrCO3. Burning a flare produces strontium ions in excited states, which then emit red photons at 606 nm and several wavelengths between 636 and 688 nm. Calculate the energy (in Joules per mole) of the 649 nm emission.
When farmers irrigate their crops, as much as 60 to 70 percent of the water _____. is ruined by pests, such as rabbits that are around the crops never reaches the crop is taken up by the plant is already contaminated by lead pipes
In the ground state, has only 1 electron in a p orbital.A. carbon B. fluorine C. hydrogen D. nitrogen E. aluminum
What best describes how the testing of the initial version and the testing of the beta version fit into the four stages of the process of technological design

Pyrite and calcite are involved in _____.a. petrifaction
b. replacement
c. carbonization
d. mummification When a chemical reaction creates a thin film outline of an animal or plant, what type of preservation has occurred?
a. petrifaction
b. replacement
c. carbonization
d. mummification

Answers

The correct answer for the question that is being presented above is this one: "c. carbonization." Pyrite and calcite are involved in carbonization. It is a chemical process that occurs in rocks or other organic substances were they slowly converted into carbon or carbon-containing residue.

The correct answer for the question that is being presented above is this one: "c. carbonization."

Lithium has two isotopes.Li-6 and Li-7.
Li-6 mass = 6.015121amu
Li-7 mass = 7.016003amu
Lithium Mass = 6.94049amu

What is percent abundance of Li-6?

I know that there is an equation:
6.9409 = (% Abundance Li-6 * Weight of Li-6) + (% Abundance Li-7 * Weight of Li-7)

I don't know how to use it.

Answers

This is in the assumption that these are the only 2 isotopes. This means that:
abundance of Li-6 = X
abundance of Li-7 = 1-X

Hence from your equations
6.9409 = (X * 6.015121amu) + ((1-X) * 7.016003amu)
Solve for X = 0.075 or 7.50%

Answer: This is in the assumption that these are the only 2 isotopes. This means that:

abundance of Li-6 = X

abundance of Li-7 = 1-X

Hence from your equations

6.9409 = (X * 6.015121amu) + ((1-X) * 7.016003amu)

Solve for X = 0.075 or 7.50%

Explanation:

Find a mole of 0.0960 g of H2SO4

Answers

Molar mass H₂SO₄ = 98.079 g/mol

1 mol -------- 98.079 g
? mole ------ 0.0960 g

moles = 0.0960 * 1 / 98.079

= 0.0960 / 98.079

= 9.788 x 10⁻⁴ moles

hope this helps!

Final answer:

The number of moles of 0.0960 grams of H2SO4 can be calculated using the formula: mole = mass / molecular weight. Given that the molecular weight of H2SO4 is 98.08 g/mol, we find that 0.0960 grams of H2SO4 is approximately 0.000978 moles.

Explanation:

The question is asking us to find a mole of 0.0960 g of H2SO4. In order to solve it, we need to know the molecular weight of H2SO4 (Sulfuric acid), which is approximately 98.08 g/mol.

This means that 1 mole of H2SO4 has a mass of 98.08 grams. We would now like to find out how many moles correspond to 0.0960 grams.

We use the equation: mole = mass / molecular weight, thus: mole = 0.0960 g / 98.08 g/mol = 0.000978 moles.

Therefore, 0.0960 grams of H2SO4 corresponds to approximately 0.000978 moles.

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An explosion that releases great amounts of heat is an example ofan exothermic process
an implosion
an endothermic process
a phase change

(please explain! Do not jus give me the answer... I know its not B or
d.

Answers

An explosion that releases great amounts of heat is an example of an exothermic process. Any reaction that gives off or releases energy as light, electricity, heat, or sound is considered to be exothermic, with "exo" meaning "outside". An explosion is one of the most extreme cases of exothermic reactions.

What is the empirical formula for a compound if a sample contains 3.72 g of P and 21.28 g of Cl?

Answers

3.72/30.97=0.120/0.120=1
21.28/35.45=0.600/0.120=5

PCl5

Answer:

PCI5

Explanation:

A combustion reaction took place each time you used the Bunsen burner to burn methane gas (CH4). Write a balanced chemical equation for the combustion of methane. *HINT: All hydrocarbon combustion reactions need oxygen as a reactant and form the same two products.

Answers

Answer:

The answer to your question is CH₄ + 2O₂ ⇒ CO₂ + 2H₂O

Explanation:

Data

Methane = CH₄

Oxygen = O₂

Process

A combustion reaction is a kind of chemical reaction in which an organic compound reacts with oxygen to generate water and carbon dioxide.

Chemical reaction

CH₄ + O₂ ⇒ CO₂ + H₂O

Reactants Elements Products

1 C 1

4 H 2

2 O 3

Balanced chemical reaction

CH₄ + 2O₂ ⇒ CO₂ + 2H₂O

Reactants Elements Products

1 C 1

4 H 4

4 O 4

Final answer:

The balanced chemical equation for the combustion of methane is CH4 + 2O2 -> CO2 + 2H2O. This equation shows that a methane molecule reacts with two oxygen molecules to produce a carbon dioxide molecule and two water molecules while maintaining a balance as per the Law of Conservation of Mass.

Explanation:

The combustion of methane occurs when methane gas (CH4) combines with oxygen (O2) to produce carbon dioxide (CO2) and water (H2O). This reaction can be represented by the following balanced chemical equation:

CH4 + 2O2 -> CO2 + 2H2O

This means that one molecule of methane reacts with 2 molecules of oxygen to produce one molecule of carbon dioxide and two molecules of water. The chemical equation is balanced, meaning that the number of atoms of each element is the same on both sides of the equation as required by the Law of Conservation of Mass.

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Hypervitaminosis is a serious health threat associated with excessive amounts of ingested fat-soluble vitamins. why do water-soluble vitamins not commonly pose the same threat?

Which of the following would you expect to form an ionic bond when combined?. . .A. Ca and O. .B. N and O. C. Ca and Mg. . D. N and He

What is name of HOPBr2 ?