14.8 g of a salt (z)dissolved in 250 cm³ of distilled water gives a concentration of 0.80 mol dm^-3. Calculate the molar mass of the salt (z).

• A.13.5 g mol^-1
• B.18.5 g mol^-1
• C.47.4 g mol^-1
• D.74.0 g mol^-1