1
Chemistry Name ________________________
Mr. Reger
Review Guide – Ch. 9 - Stoichiometry Date ______________ Period _____
2 Cu (s) + O2(g) 2 CuO (s)
1. The balanced equation above tells us that 1 mol of copper
a) reacts with 1 mol of O2(g)
b) produces 1 mol of CuO
c) must react with 32g O2(g)
d) cannot react with oxygen
e) produces 2 mol of CuO
2. A 3.0-mol sample of KClO3 was decomposed according to the equation below.
2 KClO3(s) 2 KCl(s) + 3 O2(g)
How many moles of O2(g) are expected to form?
a) 2.0 mol
b) 2.5 mol
c) 3.0 mol
d) 4.0 mol
e) 4.5 mol
3. Excess Al is reacted with 6.0 mol Br2 according to the equation below.
2 Al + 3 Br2 2 AlBr3
How many moles of AlBr3 are expected to form?
a) 2.0
b) 3.0
c) 4.0
d) 6.0
e) 8.0
4. Using the chemical equation below, determine how many moles of NH3 will be produced if
100.g of N2 is reacted with excess H2.
__ N2(g) + __ H2(g) __ NH3(g)
a) 2.00 mol
b) 3.57 mol
c) 7.14 mol
d) 33.3 mol
e) none of the above
