Podcast
Questions and Answers
What is the formula weight of Mg(NO3)2?
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?
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?
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)
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?
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?
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 is stoichiometry based on?
What does an empirical formula provide?
What does an empirical formula provide?
What does a molecular formula specify?
What does a molecular formula specify?
What is the purpose of stoichiometry in chemical reactions?
What is the purpose of stoichiometry in chemical reactions?
What do structural formulas reveal about chemical compounds?
What do structural formulas reveal about chemical compounds?
Why are atomic weight scales established?
Why are atomic weight scales established?
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