Question

odinary chlorine gas has 2 chlorine 35 and chlorine 37 in the ratio of 3:1.Calculate the relative atomic mass of chlorine ​

Answer 1

Answer:

Chlorine has two isotopes namely ³⁵Cl and ³⁷Cl

³⁵Cl:³⁷Cl=3:1

Let the relative abundance of ³⁵Cl be 3x % and ³⁷Cl be x %

3x+x=100⇒4x=100⇒x=25

Relative abundance of ³⁵Cl=3×25=75%

Relative abundance of ³⁷Cl=25%

Atomic mass of chlorine=(75/100×35)+(25/100×37)

=105/4+37/4=142/4=35.5 u(Ans.)

Explanation: