AVERAGE ATOMIC MASS
Determine the average atomic mass of the following mixtures of isotopes.

1.)  75 % 133Cs, 20 % 132Cs, and 5 % 134Cs

 

2.)  80 % 127I, 17 % 126I, 3 % 128I

 

3.)  50 % 197Au, 50 % 198Au

 

4.)  15 % 55Fe, 85 % 56Fe

 

5.)  99 % 1H, 0.8 % 2H, 0.2 % 3H

 

6.)  95 % 14N, 3 % 15N, 2 % 16N

 

7.) 98 % 12C, 2 % 14C

 

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