Mass and Moles Worksheet
Explore the concepts of atomic mass, molar mass, and mole calculations in chemistry. This worksheet is designed for Grade 11 science students.
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Mass and Moles: Grade 11 Chemistry
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Read each question carefully and answer to the best of your ability. Show all your work for calculation problems.
1. The is the mass of one mole of a substance, expressed in grams per mole (g/mol).
2. Avogadro's number is approximately particles per mole.
3. The atomic mass of an element is the average mass of its isotopes, weighted by their abundance.
1. What is the molar mass of H₂O?
1.008 g/mol
16.00 g/mol
18.016 g/mol
2.016 g/mol
2. How many moles are in 36.032 grams of H₂O?
1 mole
2 moles
3 moles
4 moles
1. Explain the relationship between atomic mass units (amu) and molar mass.
2. Calculate the number of atoms in 0.5 moles of carbon (C). Show your work.
1. The molar mass of a compound is the sum of the atomic masses of all the atoms in its chemical formula.
True
False
2. One mole of any substance contains the same number of particles.
True
False
1. A sample of an unknown compound has a mass of 25.0 grams and contains 0.25 moles. Calculate the molar mass of the compound. Then, if the compound is known to contain only carbon and hydrogen, suggest a possible chemical formula for the compound.