Regents Chemistry Stoichiometry Practice
Name: ________________________________________ Date: _____________
1. Given the unbalanced equation:
SiF4 + I2O5 à IF5+ SO2
a. Balance the equation
b. How many moles of silicon dioxide are produced from each mole of sulfur tetrafluoride consumed?
c. What is the total number of moles of I2O5 used to produce 111 g of IF5?
2. Given the reaction:
N2 + 3H2 à 2NH3
a. What is the maximum number of moles of nitrogen trihydride that can be produced when 2.4 moles of hydrogen is completely reacted?
b. How many grams of nitrogen trihydride are formed?
3. Given the unbalanced reaction:
Al + Cl2 à AlCl3
a. What is the total number of moles of aluminum needed to produce 8.2 moles of aluminum chloride?
b. What is the mass of 8.2 moles of aluminum chloride?
c. How many moles of chlorine are needed to completely react with the aluminum calculated in part a?
4. Al(s) + CuCl2(aq) à AlCl3(aq) + Cu(s)
a. How many grams of aluminum metal are required to completely react with 4.52 moles of copper (II) chloride?
b. If 15.3 grams of copper metal were formed in this reaction, how many grams of aluminum would you have started with?