Question

metal oxide
Contains 40% of
Oxygen.If valency of
that metal is 2 .calculate
the atomic mass.

tomorrow is my exam so please answer correctly.
don't answer for points.​

Answer 1

60% metal means oxide is 40% so,

100g of metaloxide contains 60g metal and 40g oxygen,therefore

equivalent weight of metal is=mass of metal x 8/mass of oxygen = (60/40)x 8=12