Question

Suppose the elements x and y combine to form two compounds xy2 and x3y2. When 0.1 mole of xy2 weighs 10 g and 0.05 mole of x3y2 weighs 9 g; the atomic weights of x and y are --->

Answer 1

Molar Mass -

The mass of one mole of a substance in grams is called its molar mass.

- wherein

Molar mass of water = 18 g mol-1

Let the atomic weight of X = x

and atomic weight of Y = y

then , x+2y = \frac{10}{0.1}

and 3x+2y = \frac{9}{0.05} = 180

as saluiy , we get

x=40

y=30