Q. Two elements $X$ (at. Wt. 75) and $Y$ (at. wt. 16) combine to give a compound having 75.8% of $X$. The formula of compound will be
A) $XY$
B) $X_{2}Y$
C) $XY_{3}$
D) $X_{2}Y_{3}$
Explanation
(d)
[table] Element | Percentage | At. Wt. | Moles | Simplest
Ratio ; $\ X$
$\ \ \ Y$ | 75.8
24.2 | 75
16 | $\frac{75.8}{15} = 1$
$\frac{24.2}{16} = 1.5$ | 2
3 [/table]
$\therefore$ The formula of the compound is$X_{2}Y_{3}$.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.