Grams to Moles Conversions Worksheet
This worksheet provides practice problems for converting between grams and moles of chemical substances, essential for stoichiometry in Grade 10 Chemistry.
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Grams to Moles Conversions
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Read each question carefully and show all your work for calculations.
1. What is molar mass? Explain its importance in chemistry.
2. The unit for molar mass is .
3. To convert from grams to moles, you must by the molar mass.
4. Avogadro's number is approximately .
5. Calculate the number of moles in 50.0 grams of water (H₂O). (Atomic masses: H = 1.01 g/mol, O = 16.00 g/mol)
6. How many moles are present in 125 grams of sodium chloride (NaCl)? (Atomic masses: Na = 22.99 g/mol, Cl = 35.45 g/mol)
7. Which of the following is the correct formula to convert grams to moles?
moles = grams × molar mass
moles = grams / molar mass
moles = molar mass / grams
moles = grams + molar mass
8. What is the molar mass of CO₂? (Atomic masses: C = 12.01 g/mol, O = 16.00 g/mol)
28.01 g/mol
32.00 g/mol
44.01 g/mol
12.01 g/mol
9. A sample of an unknown compound has a mass of 78.2 grams. If the compound contains 0.50 moles, what is its molar mass?