Question

If 4.30 g of sodium and 6.75 g of chlorine form 11.05 g of sodium chloride, how many g of chlorine will form from 45.7 g of sodium chloride?

Answer 1

Since the molar mass of NaOH is 40 g/mol, we can divide the 90 g of NaOH by the molar mass (40 g/mol) to find the moles of NaOH. This the same as multiplying by the reciprocal of 40 g/mol. If the equation is arranged correctly, the mass units (g) cancel out and leave moles as the unit.....................