| 1. In the reaction of barium nitrate with sodium sulfate, an insoluble barium sulfate will form with the sodium nitrate remaining dissolved. If 130.64 g of barium nitrate are reacted with excess sodium sulfate solution, how much barium sulfate would form?
a. 11.67 g
b. 29.16 g
c. 58.32 g
d. 116.64 g
e. 233.27 g
2. In the chemical equation describing the reaction of pentane (C5H12) with oxygen to produce carbon dioxide and water, the coefficient for the carbon dioxide in the balanced equation would be which of the following?
a. 1
b. 2
c. 3
d. 4
e. 5
3. In the unbalanced reaction: _C3H8 + _O2 --> _CO2 + _H2O the ratio of moles propane to moles carbon dioxide would be which of the following?
a. 1:1
b. 2:1
c. 3:1
d. 1:3
e. 1:2
4. How many metric tons (1 metric ton = 1000 kg) of Ca3(PO4)2 must be treated with carbon and sand to make one metric ton of phosphorus?
a. 3.28 tons
b. 5.01 tons
c. 6.73 tons
d. 10.23 tons
e. none of the above
5. A compound contains 63.10% carbon, 11.92%, hydrogen and 24.97% fluorine. What is the compound's empirical formula?
a. C5H10F2
b. C5H9F
c. C3H7F
d. C4H9F
e. none of the above
6. In the unbalanced reaction: _CaCl2 (aq) + _H3PO4 (aq) --> _Ca3(PO4)2 (s) + _HCl (aq) the coefficient for the calcium chloride in the balanced reaction is which of the following?
a. 1
b. 2
c. 3
d. 4
e. 5
7. If 33.7 g of iron is reacted with excess sulfur, how much iron (III) sulfide would form?
a. 41.86 g
b. 62.79 g
c. 83.72 g
d. 125.58 g
e. none of the above are within 5%
8. What is the molar mass of calcium phosphate?
a. 180.3 g/mol
b. 247.6 g/mol
c. 310.1 g/mol
d. 378.2 g/mol
e. none of the above are within 5%
9. What is the percent carbon present in ethanol, C2H5OH?
a. 14.81%
b. 25.63%
c. 47.05%
d. 52.17%
e. none of the above
10. In the reaction: _Mg + _N2 --> _Mg3N2 would have which of the following as coefficients in the blanks indicated?
a. 1,1,1
b. 2,2,1
c. 3,1,1
d. 2,3,1
e. none of the above
11. In the unbalanced reaction: _CuSO4 (aq) + _Fe (s) --> _Fe2(SO4)3 (aq) + _Cu (s) the reaction would have which of the following as coefficients in the blanks indicated?
a. 1,1,1,1
b. 2,1,1,2
c. 3,1,1,3
d. 3,2,1,3
e. none of the above
12. If a compound is 85.65% carbon and 14.37% hydrogen, what is its most likely formula if the molar mass is 56.0?
a. CH2
b. C4H8
c. C3H12
d. C4H10
e. none of the above
13. In the reaction of 5 g of ethane (C2H6) with excess O2 how much CO2 will be formed in grams?
a. 7.33 g
b. 11.02 g
c. 14.67 g
d. 22.11 g
e. none of the above
14. When the equation of the reaction of solid aluminum with oxygen to make aluminum oxide is correctly balanced, the coefficient for the aluminum is which for the following:
a. 1
b. 2
c. 3
d. 4
e. 5
15. In the reaction of solid copper (I) sulfide with oxygen to produce copper (I) oxide and sulfur dioxide, the coefficient of the oxygen would be which of the following?
a. 1
b. 2
c. 3
d. 4
e. 5
16. Calcium carbonate will decompose when heated into calcium oxide and carbon dioxide. In a balanced equation for the reaction, the coefficent for the carbon dioxide would be which of the following?
a. 1
b. 2
c. 3
d. 4
e. 5
17. When three molecules of hydrogen reacted with 3 molecules of oxygen, what is the maximum number of molecules of water that can be produced:
a. 1
b. 1.5
c. 2
d. 2.5
e. 3
18. In the unbalanced chemical equation:_Ba + _N2 --> _Ba3N2 the reaction would have which of the following as coefficients in the blanks indicated?
a. 1,1,1
b. 2,2,1
c. 3,1,1
d. 2,3,1
e. none of the above
19. In the reaction of barium chloride and sodium sulfate the predicted products would be which of the following?
a. Ba2SO4 + 3 NaCl
b. BaSO4 + 2 NaCl
c. Ba(SO4)2 + NaCl
d. BaSO4 + 3 NaCl
e. none of the above
20. How many moles are present in 24.4 g of ZnSO4?
a. 1.320
b. 0.987
c. 0.468
d. 0.151
e. 0.0956
21.
a.
b.
c.
d.
e.
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