Question

Two elements X (atomic weight = 75) and Y (atomic weight = 16) combine to give a compound having 75.8% X. The formula of the compound is ______.

Options

• XY

• X₂Y

• X₂Y₂

• X₂Y₃

Answer 1

Two elements X (atomic weight = 75) and Y (atomic weight = 16) combine to give a compound having 75.8% X. The formula of the compound is X₂Y₃.

Explanation:

X = 75.8% = `75.8/75 ≃ 1`

Y = 24.2% = `24.2/16 ≃ 3/2`

X : Y = 2 : 3

X₂Y₃