Answer:
Explanation:
Molecular formula of lead II chromate = PbCrO₄
Molecular weight of lead II chromate = 323 g
Atomic weight of Pb = 207
323 g of lead II chromate contains 207 g of lead
.130 g of lead II chromate contains 207 x .130 / 323 g of lead
= .083 g
This mass of Pb must have come from organic salt .
.254 g of organic salt contains .083 g of Pb
100 g of organic salt contains .083 x 100 / .254 g of Pb
= 32.67 g
Required percentage composition = 32.67 % .
