# General H001: Density

The following questions are multiple choice; clearly circle the answer which you think is the most appropriate. These questions are for self-testing only, and are not suitable for assignments or exams.

1. A block of metal has a mass of 14.0 kg and a volume of 2.0 L. What is the density?

 A 14.0 kg/L B 7.0 kg/L C 2.0 kg/L D 0.5 kg/L E 0.14 kg/L

2. Ethyl acetate, an organic liquid, has a density of 0.90 kg/L. What is the mass of 2.0 L of ethyl acetate?

 A 0.50 kg B 0.90 kg C 1.0 kg D 1.8 kg E 2.0 kg

3.A large family car produces 8000 kg of carbon dioxide (CO2) in a year, contributing to global warming. What volume of CO2 is produced? The density of carbon dioxide is 2.0 g/L. (NOTE: grams/L not kilograms.)

 A 0.00025 L B 4000 L C 16000 L D 4000000 L E 16000000 L

4.A bottle of sulfuric acid has a mass of 3.62 kg and a density of 1.81 kg/L. What is the volume?

 A 0.50 L B 1.0 L C 1.81 L D 2.0 L E 3.62 L

5.A block of plastic has a mass of 2.72 kg and a volume of 3.13 L. What is the density?

 A 0.869 kg/L B 0.933 kg/L C 1.15 kg/L D 1.37 kg/L E 8.51 kg/L

6.A sample of helium gas has a volume of 1.37 L. Helium has a density of 0.179 g/L. What is the mass in grams?

 A 0.131 g B 0.245 g C 1.37 g D 4.08 g E 7.65 g

7.A bottle contains 39.5 g of liquid perfluorooctane (density 1.77 g/mL). What is the volume of the liquid?

 A 0.0448 mL B 10.1 mL C 22.3 mL D 47.0 mL E 69.9 mL

8.A solid gold royal crown, density 18.4 kg/L, weighs 1.84kg. If the crown were placed into a completely full bathtub of water, what volume of water would be displaced?

 A 1.84 L B 18.4 L C 10 L D 1.0 L E 0.10 L

9.A batch of crude paracetamol weighed 370 kg when wet with a solvent, ethanol. During the drying process, 100 L ethanol (density 0.79 kg/L) was removed. What mass of dry paracetamol remained?

 A 470 kg B 449 kg C 291 kg D 270 kg E 79 kg

10.Molten iron metal (density 7.55 kg/L) is flowing out of a furnace, which originally contained 10,000 kg (10 tonnes) metal. So far, the steel workers have collected 40 ingots that are each 25 L in size. Assuming the density of iron stays the same, how many more ingots can they expect to collect?

 A 53 B 40 C 27 D 17 E 13

1. B

2. D

3. D

4. D

5. A

6. B

7. C

8. E

9. C

10. E