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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