Grams to Moles Conversions Worksheet
A Grade 11 Chemistry worksheet focusing on converting between grams and moles using molar mass, with practice problems and examples.
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Grams to Moles Conversions
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Read each question carefully and show all your work. Use the periodic table to find atomic masses when needed. Round all molar masses to two decimal places.
1. The molar mass of an element is numerically equal to its mass in grams per mole.
2. To convert from grams to moles, you must the given mass by the molar mass.
3. Avogadro's number states that one mole of any substance contains particles.
1. How many moles are in 50.0 grams of water (H2O)?
2. Calculate the number of moles in 125 grams of calcium carbonate (CaCO3).
1. Which of the following correctly represents the molar mass of sodium chloride (NaCl)?
23.00 g/mol
35.45 g/mol
58.45 g/mol
116.90 g/mol
1. A sample of an unknown compound has a mass of 78.0 grams. If the sample contains 1.50 moles, what is the molar mass of the compound?