Grade 11 Mole Concept Worksheet
This worksheet covers fundamental concepts of the mole, Avogadro's number, molar mass, and mole conversions for Grade 11 Chemistry students.
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Grade 11 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 Avogadro's number?
6.022 x 10^23 particles/mol
1.000 x 10^23 particles/mol
6.022 x 10^22 particles/mol
1.000 x 10^22 particles/mol
2. 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
16.991 g/mol
1.008 g/mol
3. The is the SI unit for the amount of substance.
4. One mole of any substance contains particles.
5. 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=15.999 g/mol)
6. How many atoms are present in 2.5 moles of helium (He)?
7. The molar mass of an element is numerically equal to its atomic mass.
True
False
8. A mole of a gas always occupies 22.4 L at STP, regardless of the gas type.
True
False
9. Consider a sample of 100.0 grams of sodium chloride (NaCl).
a) Calculate the number of moles of NaCl in the sample. (Atomic masses: Na=22.99 g/mol, Cl=35.45 g/mol)
b) How many formula units of NaCl are present in this sample?