How do you calculate the molar mass of a compound?

To calculate the molar mass of a compound, follow these steps:

1. Write the chemical formula of the compound.
   Example: H₂O (water), CO₂ (carbon dioxide), NaCl (sodium chloride).
2. Find the atomic masses of each element in the formula.
   • These values are taken from the periodic table (usually in grams per mole, g/mol).
   • For example: H = 1 g/mol, O = 16 g/mol, C = 12 g/mol, Na = 23 g/mol, Cl = 35.5 g/mol.
3. Multiply the atomic mass of each element by the number of atoms of that element in the formula.
   • For H₂O:
     • Hydrogen (H): 2 × 1 = 2 g/mol
     • Oxygen (O): 1 × 16 = 16 g/mol
4. Add up the values for all the elements to get the molar mass of the compound.
   • For H₂O: 2 + 16 = 18 g/mol
   • For CO₂: (C = 12) + (O = 16 × 2 = 32) = 44 g/mol
   • For NaCl: 23 + 35.5 = 58.5 g/mol