Question

3.A sample of chlorine contains 75% of 35

17Cl and 25% of 37
17Cl.
Calculate the relative molecular mass of chlorine.​

Answer 1

35.5

Step-by-step explanation:

Given parameters:

Abundance of chlorine Cl - 35 = 75%

Mass of Cl - 35 = 35

Abundance of Cl - 37 = 25%

Mass of Cl - 37 = 37

Unknown:

Relative molecular mass = ?

Solution:

The relative molecular mass of the chlorine can be deduced using the expression below:

Relative molecular mass = (abundance x mass of Cl - 35) + ( abundance x mass of Cl - 37)

Relative molecular mass = (75% x 35) + (25% x 37) = 35.5