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ScienceAges 16-18

Moles & molar mass

Calculate the amount of substance in moles by dividing sample mass by molar mass (n = m ÷ M). Review suitability for your learners before teaching.

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Worksheet StudioPractice pack · Ages 16-18

Moles & molar mass

Take your time. Show your thinking.

  1. 1. Calculate the number of moles in 320 g of NaOH (molar mass M = 40 g/mol).

    320 g NaOH · M = 40 g/mol

  2. 2. Calculate the number of moles in 360 g of NaOH (molar mass M = 40 g/mol).

    360 g NaOH · M = 40 g/mol

  3. 3. Calculate the number of moles in 196 g of N₂ (molar mass M = 28 g/mol).

    196 g N₂ · M = 28 g/mol

  4. 4. Calculate the number of moles in 280 g of N₂ (molar mass M = 28 g/mol).

    280 g N₂ · M = 28 g/mol

  5. 5. Calculate the number of moles in 90 g of H₂O (molar mass M = 18 g/mol).

    90 g H₂O · M = 18 g/mol

  6. 6. Calculate the number of moles in 80 g of NaOH (molar mass M = 40 g/mol).

    80 g NaOH · M = 40 g/mol

  7. 7. Calculate the number of moles in 32 g of CH₄ (molar mass M = 16 g/mol).

    32 g CH₄ · M = 16 g/mol

  8. 8. Calculate the number of moles in 238 g of NH₃ (molar mass M = 17 g/mol).

    238 g NH₃ · M = 17 g/mol

  9. 9. Calculate the number of moles in 132 g of CO₂ (molar mass M = 44 g/mol).

    132 g CO₂ · M = 44 g/mol

  10. 10. Calculate the number of moles in 234 g of H₂O (molar mass M = 18 g/mol).

    234 g H₂O · M = 18 g/mol

  11. 11. Calculate the number of moles in 352 g of O₂ (molar mass M = 32 g/mol).

    352 g O₂ · M = 32 g/mol

  12. 12. Calculate the number of moles in 252 g of N₂ (molar mass M = 28 g/mol).

    252 g N₂ · M = 28 g/mol
12 questions · Seed 43 · Age guidance, not curriculum certification
View the answer key
Worksheet StudioAnswer key · Ages 16-18

Moles & molar mass

Answers and reasoning. Review before teaching.

  1. 1. Calculate the number of moles in 320 g of NaOH (molar mass M = 40 g/mol).

    8 mol

    Amount in moles n = mass ÷ molar mass = 320 ÷ 40 = 8 mol.

  2. 2. Calculate the number of moles in 360 g of NaOH (molar mass M = 40 g/mol).

    9 mol

    Amount in moles n = mass ÷ molar mass = 360 ÷ 40 = 9 mol.

  3. 3. Calculate the number of moles in 196 g of N₂ (molar mass M = 28 g/mol).

    7 mol

    Amount in moles n = mass ÷ molar mass = 196 ÷ 28 = 7 mol.

  4. 4. Calculate the number of moles in 280 g of N₂ (molar mass M = 28 g/mol).

    10 mol

    Amount in moles n = mass ÷ molar mass = 280 ÷ 28 = 10 mol.

  5. 5. Calculate the number of moles in 90 g of H₂O (molar mass M = 18 g/mol).

    5 mol

    Amount in moles n = mass ÷ molar mass = 90 ÷ 18 = 5 mol.

  6. 6. Calculate the number of moles in 80 g of NaOH (molar mass M = 40 g/mol).

    2 mol

    Amount in moles n = mass ÷ molar mass = 80 ÷ 40 = 2 mol.

  7. 7. Calculate the number of moles in 32 g of CH₄ (molar mass M = 16 g/mol).

    2 mol

    Amount in moles n = mass ÷ molar mass = 32 ÷ 16 = 2 mol.

  8. 8. Calculate the number of moles in 238 g of NH₃ (molar mass M = 17 g/mol).

    14 mol

    Amount in moles n = mass ÷ molar mass = 238 ÷ 17 = 14 mol.

  9. 9. Calculate the number of moles in 132 g of CO₂ (molar mass M = 44 g/mol).

    3 mol

    Amount in moles n = mass ÷ molar mass = 132 ÷ 44 = 3 mol.

  10. 10. Calculate the number of moles in 234 g of H₂O (molar mass M = 18 g/mol).

    13 mol

    Amount in moles n = mass ÷ molar mass = 234 ÷ 18 = 13 mol.

  11. 11. Calculate the number of moles in 352 g of O₂ (molar mass M = 32 g/mol).

    11 mol

    Amount in moles n = mass ÷ molar mass = 352 ÷ 32 = 11 mol.

  12. 12. Calculate the number of moles in 252 g of N₂ (molar mass M = 28 g/mol).

    9 mol

    Amount in moles n = mass ÷ molar mass = 252 ÷ 28 = 9 mol.

12 questions · Seed 43 · Age guidance, not curriculum certification
Worksheet StudioPractice pack · Ages 16-18

Moles & molar mass

Take your time. Show your thinking.

  1. 1. Calculate the number of moles in 320 g of NaOH (molar mass M = 40 g/mol).

    320 g NaOH · M = 40 g/mol

  2. 2. Calculate the number of moles in 360 g of NaOH (molar mass M = 40 g/mol).

    360 g NaOH · M = 40 g/mol

  3. 3. Calculate the number of moles in 196 g of N₂ (molar mass M = 28 g/mol).

    196 g N₂ · M = 28 g/mol

  4. 4. Calculate the number of moles in 280 g of N₂ (molar mass M = 28 g/mol).

    280 g N₂ · M = 28 g/mol

  5. 5. Calculate the number of moles in 90 g of H₂O (molar mass M = 18 g/mol).

    90 g H₂O · M = 18 g/mol

  6. 6. Calculate the number of moles in 80 g of NaOH (molar mass M = 40 g/mol).

    80 g NaOH · M = 40 g/mol

  7. 7. Calculate the number of moles in 32 g of CH₄ (molar mass M = 16 g/mol).

    32 g CH₄ · M = 16 g/mol

  8. 8. Calculate the number of moles in 238 g of NH₃ (molar mass M = 17 g/mol).

    238 g NH₃ · M = 17 g/mol

  9. 9. Calculate the number of moles in 132 g of CO₂ (molar mass M = 44 g/mol).

    132 g CO₂ · M = 44 g/mol

  10. 10. Calculate the number of moles in 234 g of H₂O (molar mass M = 18 g/mol).

    234 g H₂O · M = 18 g/mol

  11. 11. Calculate the number of moles in 352 g of O₂ (molar mass M = 32 g/mol).

    352 g O₂ · M = 32 g/mol

  12. 12. Calculate the number of moles in 252 g of N₂ (molar mass M = 28 g/mol).

    252 g N₂ · M = 28 g/mol
12 questions · Seed 43 · Age guidance, not curriculum certification
Worksheet StudioAnswer key · Ages 16-18

Moles & molar mass

Answers and reasoning. Review before teaching.

  1. 1. Calculate the number of moles in 320 g of NaOH (molar mass M = 40 g/mol).

    8 mol

    Amount in moles n = mass ÷ molar mass = 320 ÷ 40 = 8 mol.

  2. 2. Calculate the number of moles in 360 g of NaOH (molar mass M = 40 g/mol).

    9 mol

    Amount in moles n = mass ÷ molar mass = 360 ÷ 40 = 9 mol.

  3. 3. Calculate the number of moles in 196 g of N₂ (molar mass M = 28 g/mol).

    7 mol

    Amount in moles n = mass ÷ molar mass = 196 ÷ 28 = 7 mol.

  4. 4. Calculate the number of moles in 280 g of N₂ (molar mass M = 28 g/mol).

    10 mol

    Amount in moles n = mass ÷ molar mass = 280 ÷ 28 = 10 mol.

  5. 5. Calculate the number of moles in 90 g of H₂O (molar mass M = 18 g/mol).

    5 mol

    Amount in moles n = mass ÷ molar mass = 90 ÷ 18 = 5 mol.

  6. 6. Calculate the number of moles in 80 g of NaOH (molar mass M = 40 g/mol).

    2 mol

    Amount in moles n = mass ÷ molar mass = 80 ÷ 40 = 2 mol.

  7. 7. Calculate the number of moles in 32 g of CH₄ (molar mass M = 16 g/mol).

    2 mol

    Amount in moles n = mass ÷ molar mass = 32 ÷ 16 = 2 mol.

  8. 8. Calculate the number of moles in 238 g of NH₃ (molar mass M = 17 g/mol).

    14 mol

    Amount in moles n = mass ÷ molar mass = 238 ÷ 17 = 14 mol.

  9. 9. Calculate the number of moles in 132 g of CO₂ (molar mass M = 44 g/mol).

    3 mol

    Amount in moles n = mass ÷ molar mass = 132 ÷ 44 = 3 mol.

  10. 10. Calculate the number of moles in 234 g of H₂O (molar mass M = 18 g/mol).

    13 mol

    Amount in moles n = mass ÷ molar mass = 234 ÷ 18 = 13 mol.

  11. 11. Calculate the number of moles in 352 g of O₂ (molar mass M = 32 g/mol).

    11 mol

    Amount in moles n = mass ÷ molar mass = 352 ÷ 32 = 11 mol.

  12. 12. Calculate the number of moles in 252 g of N₂ (molar mass M = 28 g/mol).

    9 mol

    Amount in moles n = mass ÷ molar mass = 252 ÷ 28 = 9 mol.

12 questions · Seed 43 · Age guidance, not curriculum certification