Section 12.1 Counting Particles of Matter Practice Test
 1. A direct measurement on a sample of pure substance can be converted to a count of the number of particles through ________________.
 a. geometry b. stoichiometry c. telemetry d. theory
 2. The number of things in one mole is the ________________.
 a. Avogadro constant b. gram c. atomic mass unit d. kilogram
 3. How many hydrogen atoms are in one mole of hydrogen molecules?
 a. 12.04 × 1023 b. 6.02 × 1023 c. 2.02 d. 1.01
 4. What is the molar mass of arsenic?
 a. 74.9 g/mol b. 74.9 u/mol c. 33 lb/mol d. 33 kg/mol
 5. What is the molar mass of carbon dioxide?
 a. 6.02 × 1023 g/mol b. 12.0 g/mol c. 32.0 g/mol d. 44.0 g/mol
 6. How many moles of sucrose, C12H22O11, are in 1222 g of sucrose?
 a. 0.258 b. 1.22 c. 3.57 d. 10.8
 7. How many moles of calcium are in 0.544 g of calcium?
 a. 0.0136 b. 0.0773 c. 0.554 d. 3.11
 8. What is the mass of 2.40 mol of copper?
 a. 152 g b. 26.5 kg c. 3.78 mg d. 5.65 g
 9. How many atoms are in 34.6 g of carbon?
 a. 1.73 × 1024 b. 12.1 × 1023 c. 2.88 d. 0.00554
 10. Determine the number of atoms in 3.54 mol S.
 a. 1.70 x 10 23 b. 1.70 x 10 24 c. 2.13 x 10 23 d. 2.13 x 10 24
 11. Calculate the mass in grams of 0.0790 moles of aluminum.
 a. 1.0 g b. 2.1 g c. 21 g d. 34 g
 12. How many moles of chlorine are in 100 g chlorine (Cl)?
 a. 0.355 b. 2.82 c. 64.6 d. 100
 13. How many atoms of carbon are in a pure sample of carbon having a mass of 72.0 g?
 a. 3.6 x 10 24 b. 36 x 10 24 c. 3.6 x 10 23 d. 4.33 x 10 25
 14. Calculate the number of moles of hydrogen atoms in 4.75 mol sulfuric acid.
 a. 2.38 mol b. 4.75 mol c. 9.50 mol d. 33.2 mol