Question

The ratio (by mass) of the metal to the oxygen present in one molecule of magnesium oxide is

1) 1:2
2) 3:4
3) 3:2
4) 1:3

Answer 1

Answer:

(2)

Explanation:

MgO$_{2}$

Mass of-

             Mg-24g

             O$_{2}$-32g

24:32=3:4