Question

To make some solution 500mL H2SO4 0.3 M. How many grams of H2SO4 are used?

Answer 1

find the RMM OF H2SO4 =2+32+(16*4) =98
there fore 1mole =98gm what for 0.3M
0.3*98/1=29.4gms


weigh 29.4 gms

Answer 2

I disagree with the answer by wilred ngure"skyicon". That calculation gives grams H2SO4 for 1 L of soln. The problem asks for 500 mL.

mols needed = M x L = 0.3 x 0.5 = 0.15
0.15 mols x molar mass of 98 = 14.7 grams.