Q. A simplest formula of a compound contains $50 \%$ element $X$ (atomic mass $10 ) \& \,50 \%$ element $Y$ (atomic mass $20$ ) is:
KCETKCET 2022
Solution:
Element
% by mass
Atomic mass
% / Atomic mass
Simple ratio
X
50
10
$50/10 = 5$
$5/2.5 = 20$
2
Y
50
20
$50/20=2.5$
$2.5/2.5 = 1$
1
Simple formula $X_2Y$
| Element | % by mass | Atomic mass | % / Atomic mass | Simple ratio | |
|---|---|---|---|---|---|
| X | 50 | 10 | $50/10 = 5$ | $5/2.5 = 20$ | 2 |
| Y | 50 | 20 | $50/20=2.5$ | $2.5/2.5 = 1$ | 1 |