Question

What is the empirical formula of a compound containing 50% by mass of element X(At=20) and 50% by mass of elementY(Are=25)?
Which solution contains 0.1 mol of sodium hydroxide?

Answer 1

Explanation:

A certain compound contains, X = 50% (Atomic weight = 10) ; Y = 50% (Atomic weight = 20)

∴ The molar ratio is given by,

X:Y=

10

50

:

20

50

=5:2.5=2:1.

Hence, the simplest formula of the compound is X

2

Y.