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More Stoichiometry Review
Balance the equation below for the problems on this page: SHOW YOUR WORK
Mg(s) +
HNO3(aq)

Mg(NO3)2(s)
+
1. How many moles of Mg would react with 40 moles of HNO3?
2. How many grams of Mg(NO3)2 will be produced from 12.0g of Mg?
3. How many HNO3 molecules are needed when producing 6.8 liters of H2?
4. What volume of H2 is produced from 23.4g of HNO3 @ STP?
5. What volume of H2 will be produced from 4.85 x 1025 molecules of HNO3?
6. If 55.3g of Mg is mixed with 194.6g of HNO3…
a. Determine which chemical is the limiting reactant?
b. Find the mass of Mg(NO3)2 formed.
c. Find the volume of H2 gas that is formed @ STP.
d. Determine which reactant is in excess and by how much.
H2(g)
Balance the equation below for all the problems on this page: SHOW YOUR WORK
CO2 + H2O + Energy  C6H12O6 + O2
1. How many molecules of water are needed to make one molecule of sugar?
2. How many moles of CO2 are needed for a plant to make 2.5 mol of sugar?
3. How many CO2 molecules are needed when producing 2.5 moles of sugar?
4. What volume of oxygen is produced from 9.32 L of CO2 @ STP?
5. How many grams of C6H12O6 will be made from 120g of carbon dioxide?
6. If a flower is given 35.0 g of water and 81.5 g of CO2, determine which is the limiting
reactant.


Determine which reactant is in excess and by how much.
What is the percent yield if only 58.8 g of O2 is actually produced?