Question

Zn-64 = 48.63%

Zn-66 = 27.90%
Zn-67 = 4.10%
Zn-68 = 18.75%
Zn-70 = .62%
Calculate the average atomic mass/given their percent abundance

Answer 1

A = 65.46 u

Step-by-step explanation:

Given that,

The composition of zinc is as follows :

Zn-64 = 48.63%

Zn-66 = 27.90%

Zn-67 = 4.10%

Zn-68 = 18.75%

Zn-70 = .62%

We need to find the average atomic mass of the given element. It can be solved as follows :

`A=(48.63* 64+27.90* 66+4.1* 67+18.75* 68+0.62* 70)/(100)\\A=65.46\ u`

So, the average atomic mass of zinc is 65.46 u.