1. Answers
(2) C (3) C (4) D (5) C (6) C (7) A (8) C (9) C (10) B (11) C

2. What is the molar mass of (NH4)2CO3?
iRespond Question
Multiple Choice F F
A.) 144 g/mol
B.) 138 g/mol
C.) 96 g/mol
D.) 78 g/mol
E.)

3. What is the percent composition of chromium in BaCrO4?
iRespond Question
Multiple Choice F F
A.) 4.87 %
B.) 9.47 %
C.) 20.5 %
D.) 25.2 %
E.)

4. What is the mass in grams of 5.90 moles of C8H18?
iRespond Question
Multiple Choice F F
A.) g
B.) 19.4 g
C.) 389 g
D.) 673 g
E.)

5. What is the number of moles in 432 grams of Ba(NO3)2?
iRespond Question
Multiple Choice F F
A.) mol
B.) mol
C.) 1.65 mol
D.) 3.66 mol
E.)

6. How many atoms are in 3.5 moles of arsenic atoms?
iRespond Question
Multiple Choice F F
A.) 5.8 x atoms
B.) 7.5 x 101 atoms
C.) 2.1 x 1024 atoms
D.) 1.7 x 1023 atoms
E.)

7. How many moles of silver atoms are in 1.8 x 1020 atoms of silver?
iRespond Question F
Multiple Choice
A.) 3.0 x 10-4
B.) 3.3 x 10-3
C.) 3.0 x 102
D.) 1.1 x 1044
E.)

8. What is the number of moles in 500 Liters of Helium gas at STP?
iRespond Question
Multiple Choice F F
A.) 0.05 mol
B.) 0.2 mol
C.) 22 mol
D.) 90 mol
E.)

9. Which of the following is NOT an empirical formula?
iRespond Question
Multiple Choice F F
A.) Sb2S3
B.) C2H8O
C.) C2N2H8
D.) BeCr2O7
E.)

10. Which of the following have the same empirical formula?
iRespond Question
Multiple Choice F F
A.) CO2 and SO2
B.) C7H14 and C10H20
C.) C4H10 and C10H4
D.) C6H12 and C6H14
E.)

11. What is the empirical formula of a compound that is 40% sulfur and 60% oxygen by weight?
iRespond Question
Multiple Choice F F
A.) SO
B.) SO2
C.) SO3
D.) S6O4
E.)