# The chromate ion has the formula CrO_4^(2-) What is the formula of tin (II) chromate?

$\text{Stannous chromate}$ is $S n C r {O}_{4}$.........
The salt is composed of $S {n}^{2 +}$ and $C r {O}_{4}^{2 -}$ ions. The ions this combine 1:1 to give an electrically neutral salt.