Chemistry Mole & Stoichiometry Quiz Online

Chemistry mole & stoichiometry concepts are essential to learning for every level in chemistry courses. Here, we have compiled many chemistry mole and stoichiometry quizzes free for students of grades 11 and 12. We hope you will find this very useful for your regular exam preparations and entry tests at undergraduate levels, particularly for medical and engineering students (MDCAT, ECAT, NUST, NUMS, JEE, NEET).
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Results

#1. A gas sample contains 16.0 g of CH4, 16.0 g of O2, 16.0 g of SO2, and 33.0 g of CO2. What is the total number of moles of gas in the sample?

4.00 moles

4.00 moles

2.75 moles

2.75 moles

2.50 moles

2.50 moles

3.00 moles

3.00 moles

2.25 moles

2.25 moles

#2. How many grams of calcium fluoride contain 38 grams of fluoride atoms?

38 grams

38 grams

39 grams

39 grams

78 grams

78 grams

59 grams

59 grams

57 grams

57 grams

#3. How many mL of SO2 gas are present at STP in a 100 gram sample that is 6.4% SO2 by mass

11.2 ml

11.2 ml

1120 ml

1120 ml

22.4 ml

22.4 ml

2.24 ml

2.24 ml

2240 ml

2240 ml

#4. How many moles of chloride ions are present in a 66.7 gram sample of AlCl3?

1.33 moles

1.33 moles

2.0 moles

2.0 moles

1.0 mole

1.0 mole

0.5 moles

0.5 moles

1.5 moles

1.5 moles

#5. How many oxygen atoms are there in 22.0 g of carbon dioxide?

1.20 x1024

1.20 x1024

6.02 x1023

6.02 x1023

5.09 x1023

5.09 x1023

1.42 x1024

1.42 x1024

1.02 x1024

1.02 x1024

#6. The empirical formula for an oxide of nitrogen that is 30.4% by mass nitrogen is

N2O

N2O

NO2

NO2

NO4

NO4

NO3

NO3

NO

NO

#7. Rubbing alcohol was found to contain 47.0 % carbon, 10.0 % hydrogen, and the remaining mass was due to oxygen. What is the empirical formula of rubbing alcohol?

C2H6O

C2H6O

CHO

CHO

C3H8O

C3H8O

CH3O

CH3O

C2H4O

C2H4O

#8. Nitrogen oxide is oxidized in air to give brown nitrogen dioxide. 2NO(g) + O2(g) → 2 NO2(g) If you have 2.2 moles of NO,

You need 2.2 moles of O2 for complete reaction and produce 2.2 moles of NO2

You need 2.2 moles of O2 for complete reaction and produce 2.2 moles of NO2

You need 1.0 moles of O2 for complete reaction and produce 2.0 moles of NO2.

You need 1.0 moles of O2 for complete reaction and produce 2.0 moles of NO2.

You need 1.1 moles of O2 for complete reaction and produce 2.2 moles of NO2.

You need 1.1 moles of O2 for complete reaction and produce 2.2 moles of NO2.

You need 1.1 moles of O2 for complete reaction and produce 3.3 moles of NO2.

You need 1.1 moles of O2 for complete reaction and produce 3.3 moles of NO2.

You need 2.0 moles of O2 for complete reaction and produce 1.0 moles of NO2.

You need 2.0 moles of O2 for complete reaction and produce 1.0 moles of NO2.

#9. The very stable compound SF6 is made by burning sulfur in an atmosphere of fluorine. S8(s) + 24F2(g) → 8SF6(g) If you need 2.50 moles of SF6, you will need to use

1.00 moles of S8 and 24.0 moles of F2.

1.00 moles of S8 and 24.0 moles of F2.

2.00 moles of S8 and 12.0 moles of F2.

2.00 moles of S8 and 12.0 moles of F2.

8.00 moles of S8 and 24.0 moles of F2.

8.00 moles of S8 and 24.0 moles of F2.

0.125 moles of S8 and 3.00 moles of F2.

0.125 moles of S8 and 3.00 moles of F2.

0.313 moles of S8 and 7.50 moles of F2.

0.313 moles of S8 and 7.50 moles of F2.

#10. Magnesium and nitrogen react in a combination reaction to produce magnesium nitride: 3 Mg + N2 → Mg3N2 In a particular experiment, a 9.27-g sample of N2 reacts completely. The mass of Mg consumed is __________ g.

16.1

16.1

13.9

13.9

24.1

24.1

8.04

8.04

0.92

0.92

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