Quiz: The Mole Unit

1. One mole of boron is equivalent to how many grams?
a. 5.00 g
b. 10.81 g
c. 12.01 g
2. The mass of one mole of water (H2O) is
a. 18.02 g
b. 10.00 g
c. 17.01 g
3. The amount of a substance equal in grams to the sum of the atomic masses is a(n)
a. atom
b. mole
c. compound
4. The mass in grams of one mole of oxygen gas, O2, is
a. 8.00 g
b. 16.00 g
c. 32.00 g
5. When converting the volume of a gas into moles, you must remember that at STP
a. 1.00 L of the gas equals 1.00 mole
b. the gas is at 0°C and 1 atmosphere pressure
c. 1.00L of the gas equals 1.00 g
6. How many moles of propane, C3H8, are in 250.00g of propane?
a. 11028 moles C3H8
b. 5.6676 moles C3H8
c. 22.727 moles C3H8
7. If you have 8.6 L of helium at 0°C and 1 atmosphere of pressure, you have how many moles of helium?
a. 190 moles He
b. 1.00 mole He
c. 0.38 mole He
8. One gram formula mass of CuCl2 has a mass of
a. 99.00 g
b. 134.45 g
c. 162.55 g
9. 159.70 g is the gram formula mass of
a. FeO
b. Fe2O3
c. SrCl2
10. 3.42 moles of CaO is equivalent to
a. 56.1 g CaO
b. 112 g CaO
c. 192 g CaO
11. What are the temperature and pressure values necessary to relate 1.00 mole of a gas to 22.4 L?
a. 100°C and 1 atmosphere
b. 0°C and 1 atmosphere
c. 0°C and 100 atmospheres
12. 115.25 g of gaseous B2O3 will occupy what volume at STP?
a. 37.081 L B2O3
b. 358.20 L B2O3
c. 22.4 L B2O3
13. How many atoms of platinum (Pt) are in one mole of platinum?
a. 3.01 × 10–23
b. 6.02 × 1023
c. 1.9509 × 102

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