If the mass of the only two isotopes of an element are 115.3026 amu and 122.8251...

Question

Question

If the mass of the only two isotopes of an element are 115.3026 amu and 122.8251 amu and the weighted average mass is 118.147

science chemistry

Answer 1

Answer #1

Let 'x' is the % abundance for 115.3026 amu.

Then (100-x) will be abundance of 122.8251 amu.

Now,

115.3026*x + 122.8251*(100-x) / 100 = 118.1471

115.3026x + 12282.51 - 122.8251x = 11814.71

7.5225x = 467.8

x = 62.19 % .... Answer

Answer 2

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