Question

Two elements X and Y combine in the gaseous states to form XY in the ratio of 1 : 35.5 by mass. The mass of Y that will be required to react with 2 g of X is ______.

Options

• 7.1 g

• 3.55 g

• 71 g

• 35.5 g

Answer 1

Two elements X and Y combine in the gaseous states to form XY in the ratio of 1 : 35.5 by mass. The mass of Y that will be required to react with 2 g of X is 71 g.

Explanation:

1 g of X combines with Y = 35.5 g

∴ 2 g of X combines with Y = 2 × 35.5 g = 71 g