see the atomic mass is in the ratio 1:2

so atomic mass can be considered 2w (w is a variable)

the atomic mass is twice

for one atom is X we need 2 atoms of y.

X2Y4

XY2

Hey Dear,

◆ Answer -

Empirical formula of the compound will be XY2

◆ Explanation -

# Given -

Wx/Wy = 1/4

Mx/My = 1/2

# Solution -

Let nx & ny be the no of moles of X & Y respectively.

nx / ny = (Wx/Mx) / (Wy/My)

nx / ny = Wx.My / Wy.Mx

nx / ny = (Wx/Wy) / (Mx/My)

nx / ny = (1/4) / (1/2)

nx / ny = 1 / 2

As no of moles of X and Y are in the ratio 1 : 2, empirical formula of the compound will be XY2.

Hope this helped you.