12 Questions
What is the formula weight of Mg(NO3)2?
148.3 amu
How many moles of Hydrogen gas are there in 36g of Hydrogen?
18 moles
How many Carbon atoms are there in 0.0015 gram of CO2?
1.67 x 10^20 C atoms
How many moles of Iron are there in 1 gram of Iron? (atomic weight of Fe = 55.85 amu)
0.018 moles
What is the empirical formula of a compound with 70% Oxygen and 30% sulfur by mass?
SO2
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
What is stoichiometry based on?
Relative masses of moles
What does an empirical formula provide?
Simplest whole number ratio of atoms in a compound
What does a molecular formula specify?
Number of atoms in a molecule
What is the purpose of stoichiometry in chemical reactions?
Interpreting the results of a chemical analysis
What do structural formulas reveal about chemical compounds?
Structural differences not shown in the molecular formula
Why are atomic weight scales established?
To establish a standard for atomic weights
This quiz provides a brief review of chemical stoichiometry and its applications to chemical calculations, focusing on the conservation of mass, relative masses of moles, and the concept of mole. Test your understanding of predicting the quantities of reactant materials required in chemical reactions.
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