Grade 11 Chemistry: The Mole Concept
This worksheet covers fundamental concepts of the mole, Avogadro's number, molar mass, and basic mole calculations for Grade 11 Chemistry students.
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Grade 11 Chemistry: The Mole Concept
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Read each question carefully and provide your best answer. Show all your work for calculation problems.
1. What is Avogadro's number?
6.022 x 10^23 grams/mole
6.022 x 10^23 particles/mole
1.000 gram/mole
12.011 grams/mole
2. The molar mass of a substance is defined as:
The mass of one atom of the substance
The mass of 6.022 x 10^23 particles of the substance
The atomic number of the substance
The density of the substance
3. One mole of any substance contains particles.
4. The unit for molar mass is .
5. Calculate the molar mass of water (H₂O). (Atomic masses: H=1.01 g/mol, O=16.00 g/mol)
6. How many moles are present in 49.0 grams of sulfuric acid (H₂SO₄)? (Atomic masses: H=1.01 g/mol, S=32.07 g/mol, O=16.00 g/mol)
7. The mass of one mole of carbon-12 atoms is exactly 12 grams.
True
False
8. Avogadro's number is only applicable to atoms, not molecules.
True
False
9. How many molecules are in 2.5 moles of carbon dioxide (CO₂)?
10. What is the mass, in grams, of 3.011 x 10^23 atoms of Oxygen?
