Question

A solution of tetraoxosulphate (vi) acid contain 0•76g in 100cm3 

28cm3 of this solution neutralized 25cm3 of sodium trioxocarbonate (v)

Answer 1

Moles $=\frac{0.76}{98}=0.0078moles$

Molarity = $\frac{0.0078}{0.1}=0.078M$