In one process 600 kg of caf 2 are treated with an

In one process 6.00 kg of CaF
2
are treated with an excess of H
2
SO
4
and yield 2.86 kg
of HF. Calculate the percent yield of HF. (5 points)
(Reference: Chang 3.89)
10. Certain race cars use methanol (CH
3
OH; also called wood alcohol) as a fuel.
Methanol has a molecular mass of 32.0 g/mol and a density of 0.79 g/mL. The
combustion of methanol occurs according to the following equation:
2CH
3
OH + 3O
2
→ 2CO
2
+ 4H
In a particular reaction 2.00 L of methanol are reacted with 80.0 kg of oxygen.
a. What is the limiting reactant? (5 points)
2
O
b. What reactant and how many grams of it are left over? (5 points)
c. How many grams of carbon dioxide is produced? (5 points)
11. An iron bar weighed 664 g. After the bar had been standing in moist air for a month,
exactly one-eighth of the iron turned to rust (Fe
2
O
3
). Calculate the final mass of the
iron bar and rust. (5 points)
4
Copyright © 2016 by Thomas Edison State University . All rights reserved.