B) A compound contains 28 per cent of nitrogen and 72 per cent of a metal by weight. 3 atomsof metal combine with 2 atoms of nitrogen.Find the atomic weight of metal. . [1980]

B) A compound contains 28 per cent of nitrogen and 72 per cent of a

1.	B) A compound contains 28 per cent of nitrogen and 72 per cent of a metal by weight. 3 atomsof metal combine with 2 atoms of nitrogen.Find the atomic weight of metal. . [1980]
Answer» the compound weighs 2×14=28( ATOMIC mass of nitrogen) so divide the rest which is 72 into 3 parts 72÷3=24 for each because there are three metal ATOMS the answer WOULD be magnesium whose atomic WEIGHT is 24