Section 12.2
Stoichiometric Calculations
Practice Test
1.
Balance the following equation with the smallest whole—number coefficients. How many grams of O
2
will be produced if 23.2 g of XeF
2
reacts with excess water?
XeF
2
+H
2
O→Xe+HF+O
2
SC.B.1.4.2
a.
1.10 g
b.
3.31 g
c.
2.19 g
d.
4.42 g
Hint
2.
How many moles of sulfur are present in 5 moles of H
2
SO
4
?
a.
2 mol
b.
1 mol
c.
5 mol
d.
10 mol
Hint
3.
What mass of SrF
2
can be prepared from the reaction of 10.0 g Sr
OH
2
with excess HF?
Sr
OH
2
+2HF→SrF
2
+2H
2
O
SC.B.1.4.2
a.
9.67 g
b.
10.0 g
c.
10.3 g
d.
9.82 g
Hint
4.
Based on the following equation, how many moles of hydrochloric acid are needed to react with 0.64 moles of potassium permanganate?
2KMnO
4
+ 8 HCl → 3 Cl
2
+ 2 MnO
2
+ 4 H
2
O + 2KCl
SC.B.1.4.2
a.
2.7 mol HCl
b.
5.1 mol HCl
c.
0.64 mol HCl
d.
0.21 mol HCl
Hint
5.
If sufficient hydrochloric acid is used to react completely with 48.6 g of magnesium, how much hydrogen will be produced?
2HCl+Mg→MgCl
2
+H
2
SC.B.1.4.2
a.
1 mol
b.
6 g
c.
2 mol
d.
3 g
Hint
