What is the approximate molar mass

CHEMISTRY · Single correct · A Level · Chemistry · Amount of substance · Amount of substance

Problem

What is the approximate molar mass, in

\mathrm{g\,mol^{-1}}

, of

\mathrm{MgSO_4\cdot7H_2O}

? (1) 120 (2) 130 (3) 138 (4) 246

Related theory

Browse the problem library