Chemistry Chegg Worksheet
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ENGR1540Worksheet12Chapter4.docxENGR 1540 Worksheet 12 Chapter 4
1. When Al(OH)3 reacts with sulfuric acid, the following reaction occurs:
2Al(OH)3+3H2SO4→Al2(SO4)3+6H2O
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:
3Cu(s)+8HNO3(aq)→3Cu(NO3)2(aq)+2NO(g)+4H2O(l)
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?
3NO2(g)+H2O(l)→2HNO3(aq)+NO(g)
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:
CO(g)+2H2(g)→CH3OH(l)
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:
3Fe(s)+4H2O(g)→Fe3O4(s)+4H2(g)
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%.
CH4(g)+4S(s)→CS2(g)+2H2S(g)
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:
S(s)+3F2(g)→SF6(g)
