Chemistry Assignment Guruh Worksheet

ENGR 1540 Worksheet 12 Chapter 4

1. When Al(OH)3 reacts with sulfuric acid, the following reaction occurs:
If 1.7×103 g of Al(OH)3 is combined with 680 g of H2SO4, how much aluminum sulfate can form?

2. Copper reacts with nitric acid via the following equation:
What mass of NO(g) can be formed when 10.0 g of Cu reacts with 115 g of HNO3?

3. How much HNO3 can be formed in the following reaction if 3.6 kg of NO2 gas is bubbled through 2.5 kg of water?

4. Hydrogen and oxygen are reacted and the water formed is collected at 25℃, where it has a density of 0.997 g/mL. If 36.8 g of H2 and 168 g of O2 are reacted, how many mL of water will be collected?

5. The theoretical yield and the actual yield for various reactions are given below. Determine the corresponding percentage yields.

Theoretical Yield

Actual Yield

Reaction 1

35.0 g

12.8 g

Reaction 2

9.3 g

120 mg

Reaction 3

3.7 metric tons

1250 kg

Reaction 4

40.0 g

41.0 g

6. A reaction that produced 4.8 mg of taxol, an anticancer drug, is reported to have a yield of 38%. What was the theoretical yield?

7. Methanol, CH3OH, is used in racing cars because it is a clean-burning fuel. It can be made by this reaction:
What is the percentage yield if 5.0×103 g H2 reacts with excess CO to form 3.5×104 g CH3OH?

8. When iron and steam react at high temperatures, the following reaction takes place:
How much iron must react with excess steam to form 897 g of Fe3O4 if the reaction yield is 69%?

9. The percentage yield if the following reaction is consistently 87%.
How many grams of sulfur would be needed to obtain 80.0 g of CS2?

10. Sulfur hexafluoride is a very stable gas useful in electrical generators and switches. It is formed by direct synthesis from the elements:

If 92 g of SF6 is produced from the reaction of 115 g of sulfur in excess fluorine, what is the percentage yield?

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