# How do you calculate the percent composition of chromium in BaCrO_4?

Aug 1, 2018

In barium chromate....?

#### Explanation:

Well, we divide the molar mass of EACH element by the molar mass of the salt...

%Ba-=(137.31*g)/(253.37* g*mol^-1 )xx100%=54.2%

%Cr-=(52.00*g)/(253.37* g*mol^-1 )xx100%=20.5%

%O-=(64.00*g)/(253.37* g*mol^-1 )xx100%=25.3%

Do the elemental percentage sum to 100%? Should they do so?