Chemistry 51 - Fundamentals of Chemistry » Fall 2021 » Exp 05 Additional Questions

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Question #1
Carbon disulfide reacts with molecular oxygen to form carbon dioxide and sulfur dioxide. What are the coefficients for this balanced chemical equation? ___ CS2 + ___ O2 → ___ CO2 + ___ SO2
A.   2,3,1,1
B.   1,3,1,2
C.   1,2,2,1
D.   1,1,3,3
Question #2
Iron(III) phosphate reacts with sodium sulfate to form iron(III) sulfate and sodium phosphate. What are the coefficients for this balanced chemical equation? ___ FePO4 + ___ Na2SO4 → ___ Fe2(SO4)3 + ___ Na3PO4
A.   2,3,1,1
B.   2,1,3,2
C.   1,3,2,1
D.   2,3,1,2
Question #3
Au2S3 + 3 H2 → 2 Au + 3 H2S For the chemical reaction above, what is the maximum amount of gold (Au), in grams, that can be produced if 24.370 grams of Au2S3 is fully reacted? Round your final answer to two decimal places. Relevant elemental molar masses: H: 1.01 g/mole S: 32.06 g/mole Au: 196.97 g/mole
A.   10.19
B.   29.98
C.   21.21
D.   19.59
Question #4
6 Cs + N2 → 2 Cs3N For the chemical reaction above, how much cesium (Cs) is needed, in grams, to produce 46.293 grams of Cs3N? Round your final answer to two decimal places. Relevant elemental molar masses: N: 14.01 g/mole Cs: 132.91 g/mole
A.   34.34
B.   44.72
C.   22.72
D.   40.62
Question #5
_ C + _ S8 → _ CS2 Balance the above chemical equation. In an experiment where 19.666 grams of carbon (C) was fully reacted, 87.692 grams of CS2 was produced. What is the percent yield for this process? Round your final answer to two decimal places. Relevant elemental molar masses: C: 12.01 g/mole S: 32.06 g/mole
A.   71.44
B.   72.43
C.   70.34
D.   73.54
Question #6
_ C5H9O + _ O2 → _ CO2 + _ H2O Balance the above chemical equation. In an experiment where 45.278 grams of C5H9O was fully reacted, 85.279 grams of CO2 was produced. What is the percent yield for this process? Round your final answer to two decimal places. Relevant elemental molar masses: H: 1.01 g/mole C: 12.01 g/mole O: 16.00 g/mole
A.   70.32
B.   82.77
C.   72.87
D.   74.28

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