Question

An element x forms two oxides, formula of first oxide is xo2.The first oxide contains 50% of oxygen.If the second oxide contains 60% oxygen ,the formula of the second oxid

Answer 1

Given:

An element x forms two oxides, the formula of the first oxide is xo2. The first oxide contains 50% of oxygen.

To find:

If the second oxide contains 60% oxygen, the formula of the second oxide is?

Solution:

From given, we have,

The formula of the first oxide is xo2.  

The first oxide contains 50% of oxygen.

32/32+x = 50% = 50/100  

32/32+x = 0.5

The molecular weight of the metal, x=32

The second oxide contains 60% oxygen.

16n/32+16n = 60% = 60/100  

16n/32+16n = 0.6

upon solving, we get,

n = 3

Therefore, the formula of the second oxide is YO3