Mole Conversions Worksheet
Grade 12 Chemistry worksheet on mole conversions, including calculations involving molar mass, Avogadro's number, and stoichiometry.
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Mole Conversions Worksheet
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Read each question carefully and provide your answers in the space provided. Show all your work for calculations.
1. What is the molar mass of water (H₂O)? (Atomic masses: H=1.008 g/mol, O=15.999 g/mol)
17.007 g/mol
18.015 g/mol
19.007 g/mol
16.000 g/mol
2. How many molecules are in 2.5 moles of CO₂? (Avogadro's number = 6.022 × 10²³ molecules/mol)
1.5055 × 10²⁴ molecules
2.4088 × 10²³ molecules
6.022 × 10²³ molecules
1.2044 × 10²⁴ molecules
3. The number of particles in one mole of any substance is known as .
4. To convert from grams to moles, you should use the of the substance.
5. Calculate the number of moles in 50.0 grams of methane (CH₄). (Atomic masses: C=12.011 g/mol, H=1.008 g/mol)
6. A sample of oxygen gas (O₂) contains 3.011 × 10²⁴ molecules. What is the mass of this sample in grams? (Atomic mass: O=15.999 g/mol)
7. One mole of any substance always has a mass of exactly 1 gram.
True
False
8. Avogadro's number is used to convert between moles and the number of particles (atoms, molecules, ions).
True
False
Match each term on the left with its definition on the right.
9. Mole
a. The mass of one mole of a substance
10. Molar Mass
b. 6.022 × 10²³ particles
11. Avogadro's Number
c. A unit of amount of substance