Question

The ratio of isotopes 37CL 17 and 35 CL 17 in nature chlorine is 1:3. Calculate the fractional atomic mass of chlorine​

Answer 1

Answer:

35.5 amu

Explanation:

Given,

   The ratio of isotopes ³⁷₁₇Cl and ³⁵₁₇Cl = 1:3

If there are 4x atoms,

   ³⁷₁₇Cl = 1x

   ³⁵₁₇Cl = 3x

Fractional atomic mass of Chlorine is :-

     (35×3) + (37×1) / 4

   = 105 + 37 / 4

   = 142 / 4

   = 35  1/2

   = 35.5 amu