Chemistry

Mole Calculator

August 22, 2023
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Number of moles = weight / molecular weight

weight in gram, molecular weight in gram per mole.

Using the online calculator you can verify your answer.

Number of Moles Calculator

Number of Moles Calculator

Number of Moles:

Worksheet

Calculate the number of moles based on the given weight and molecular weight of some simple inorganic salts:

  1. Calculate the number of moles in 58.44 grams of NaCl. (Molecular weight = 58.44 g/mol)
  2. Calculate the number of moles in 117 grams of MgCl2. (Molecular weight = 95.21 g/mol)
  3. Calculate the number of moles in 40 grams of CaCO3. (Molecular weight = 100.09 g/mol)
  4. Calculate the number of moles in 98 grams of H2SO4. (Molecular weight = 98.09 g/mol)
  5. Calculate the number of moles in 150 grams of KNO3. (Molecular weight = 101.1 g/mol)
  6. Calculate the number of moles in 80 grams of Na2SO4. (Molecular weight = 142.04 g/mol)
  7. Calculate the number of moles in 75 grams of BaCl2. (Molecular weight = 137.33 g/mol)
  8. Calculate the number of moles in 180 grams of Na3PO4. (Molecular weight = 163.94 g/mol)
  9. Calculate the number of moles in 50 grams of (NH4)2SO4. (Molecular weight = 132.14 g/mol)
  10. Calculate the number of moles in 162 grams of Al2(SO4)3. (Molecular weight = 342.15 g/mol)
  11. Calculate the number of moles in 100 grams of Na2CO3. (Molecular weight = 105.99 g/mol)
  12. Calculate the number of moles in 78 grams of K2SO4. (Molecular weight = 174.26 g/mol)
  13. Calculate the number of moles in 70 grams of Ca(NO3)2. (Molecular weight = 164.1 g/mol)
  14. Calculate the number of moles in 133 grams of Na2SO3. (Molecular weight = 126.04 g/mol)
  15. Calculate the number of moles in 95 grams of FeCl3. (Molecular weight = 162.2 g/mol)
  16. Calculate the number of moles in 35 grams of AgNO3. (Molecular weight = 169.87 g/mol)
  17. Calculate the number of moles in 120 grams of NaHCO3. (Molecular weight = 84.01 g/mol)
  18. Calculate the number of moles in 92 grams of MgSO4. (Molecular weight = 120.37 g/mol)
  19. Calculate the number of moles in 111 grams of Ba(NO3)2. (Molecular weight = 261.34 g/mol)
  20. Calculate the number of moles in 90 grams of CuSO4. (Molecular weight = 159.61 g/mol)

Note: Molecular weight is given in g/mol for each compound. For the calculations, the formula to use is:

Number of moles = given weight (grams) / molecular weight (g/mol)