Answer: 0.236 mol ≈ 0.24mol
Explanation:
to find the amount of moles of salt in 13.8g of sodium chloride, NaCl, we need to find the mass of sodium in g/mol first.
To find the amount of sodium in g/mol, we sum up the individual masses of
sodium and chloride.
Mass of one mole of sodium = 23g
Mass of one mole of chlorine = 35.4g
Mass of sodium chloride = ( Mass of Na + Mass of Cl)
mass of NaCl = (23 + 35.4) = 58.4g/mol
∴ 1 mole of NaCl = 58.4g
x moles of NaCl = 13.8g
By cross multiplication, we have
13.8g × 1 mol ÷ 58.4g
=0.236mol ≈ 0.24mol
