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Density Test Questions (Wksht #3) Chemistry Test Questions From Todd Helmenstine This is a collection of ten chemistry test questions with answers dealing with the density of matter. The answers for each question are at the bottom of the page. Question 1 500 grams of sugar occupies a volume of 0.315 L. What is the density of the sugar in g/mL? Question 2 The density of a substance is 1.63 g/mL. What is the mass of 0.25 L of the substance in grams? Question 3 The density of pure solid copper is 8.94 g/mL. What volume does 5 kg of copper occupy? Question 4 What is the mass of a 450 cm³ block of silicon if the density of silicon is 2.336 g/cm³? Question 5 What is the mass of a 15 cm cube of iron if the density of iron is 7.87 g/cm³? Question 6 Which of the following is greater? a. 7.8 g/mL or 4.1 μg/μL b. 3 x 10-2 kg/cm3 or 3 x 10-1 mg/cm3 Question 7 Two liquids, A and B, have densities 0.75 g/mL and 1.14 g/mL respectively. When both liquids are poured into a container, one liquid floats on top of the other. Which liquid is on top? Question 8 How many kg of mercury would fill a 5 L container if the density of mercury is 13.6 g/cm³? Question 9 How much does 1 gallon of water weigh in lbs? Given: Density of water = 1 g/cm³ Question 10 How much space does 1 lb of butter occupy if the density of butter is 0.94 g/cm³? Answers 1. 1.587 g/mL 2. 407.5 g 3. 559 mL 4. 1051.2 g 5. 26561 g or 26.56 kg 6. a. 7.8 g/mL b. 3 x 10-2 kg/cm3 7. Liquid A. (0.75 g/mL) 8. 68 kg 9. 8.33 lbs (2.2 kg = 1 lb, 1 L = 0.264 gal) 10. 483.6 cm³