70 gms of a metal oxide on reduction produced 54 gms of metal. The atomic weight of the metal is 81. What is its valency?

70 gms of a metal oxide on reduction produced 54 gms of metal. The ato

1.	70 gms of a metal oxide on reduction produced 54 gms of metal. The atomic weight of the metal is 81. What is its valency?
Answer» Solution :wt. of metal oxide = 70 G wt. of metal = 54 g `therefore` wt of oxygen = `70-54=16g` `(W_(1))/(W_(2))=(E_(1))/(E_(2)),("wt of metal")/("wt of oxygen")=("EQ wt of metal")/("EQ wt of oxygen")` `(54)/(16)=(E)/(8)impliesE=27` At. Wt = EQ wt `xx` valency `81=27xx` valency implies Valency = 3