Grade 12 Chemistry: Mole Concept Worksheet
A comprehensive worksheet for Grade 12 students covering the mole concept, Avogadro's number, molar mass, and calculations involving moles.
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Grade 12 Chemistry: Mole Concept Worksheet
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Read each question carefully and answer to the best of your ability. Show all your work for calculation problems.
1. What is the approximate value of Avogadro's number?
6.022 x 10^23 particles/mol
1.602 x 10^-19 C
9.8 m/s^2
3.00 x 10^8 m/s
2. The molar mass of a compound is the mass of one of that compound.
gram
mole
molecule
atom
1. The mole is the SI unit for .
2. Avogadro's number represents the number of particles in one of a substance.
3. The molar mass of water (H₂O) is approximately g/mol.
1. Calculate the number of moles in 50.0 grams of calcium carbonate (CaCO₃). (Atomic masses: Ca=40.08 g/mol, C=12.01 g/mol, O=16.00 g/mol)
2. How many molecules are present in 2.5 moles of oxygen gas (O₂)?
1. One mole of any substance contains the same number of particles.
True
False
2. The molar mass of a compound is always equal to its atomic mass.
True
False
Calculate the molar mass for each of the following compounds:
1. NaOH
2. C₆H₁₂O₆
3. H₂SO₄