Respostas

2014-08-10T13:00:54-03:00
Massa molar de  H_{2} S O_{4} = 98 g/mol

Regra de 3:
98g -------- 1 mol
19,6g ----- x mols
x =  \frac{19,6}{98} = 0,2 mol

Resp: C = 0,2 mol/L