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Chemical Stoichiometry Review

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Questions and Answers

What is the formula weight of Mg(NO3)2?

75.3 amu

86.31 amu

110.45 amu

148.3 amu (correct)

How many moles of Hydrogen gas are there in 36g of Hydrogen?

18 moles (correct)

4.02 moles

27 moles

12 moles

How many Carbon atoms are there in 0.0015 gram of CO2?

5 x 10^19 C atoms

1.5 x 10^18 C atoms

1.67 x 10^20 C atoms (correct)

3 x 10^21 C atoms

How many moles of Iron are there in 1 gram of Iron? (atomic weight of Fe = 55.85 amu)

0.018 moles Signup and view all the answers

What is the empirical formula of a compound with 70% Oxygen and 30% sulfur by mass?

SO2 Signup and view all the answers

In the reaction: 2 NaI + Pb(NO3)2 -> PbI2 + 2 NaNO3, how many moles of lead iodide are produced from 5 moles of sodium iodide?

10 moles Signup and view all the answers

What is stoichiometry based on?

Relative masses of moles Signup and view all the answers

What does an empirical formula provide?

Simplest whole number ratio of atoms in a compound Signup and view all the answers

What does a molecular formula specify?

Number of atoms in a molecule Signup and view all the answers

What is the purpose of stoichiometry in chemical reactions?

Interpreting the results of a chemical analysis Signup and view all the answers

What do structural formulas reveal about chemical compounds?

Structural differences not shown in the molecular formula Signup and view all the answers

Why are atomic weight scales established?

To establish a standard for atomic weights Signup and view all the answers

Chemical Stoichiometry Review

Choose a study mode

Podcast

Questions and Answers

What is the formula weight of Mg(NO3)2?

How many moles of Hydrogen gas are there in 36g of Hydrogen?

How many Carbon atoms are there in 0.0015 gram of CO2?

How many moles of Iron are there in 1 gram of Iron? (atomic weight of Fe = 55.85 amu)

What is the empirical formula of a compound with 70% Oxygen and 30% sulfur by mass?

In the reaction: 2 NaI + Pb(NO3)2 -> PbI2 + 2 NaNO3, how many moles of lead iodide are produced from 5 moles of sodium iodide?

What is stoichiometry based on?

What does an empirical formula provide?

What does a molecular formula specify?

What is the purpose of stoichiometry in chemical reactions?

What do structural formulas reveal about chemical compounds?

Why are atomic weight scales established?

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