1.

Carbon occurs in nature as a mixture of carbon-12 and carbon-132. the average atomic mass of carbon is 12.011. what is the percentage abundance of carbon -12 in nature?

Answer»

SOLUTION :Let x be the PERCENTAGE abundance of CARBON-12:
then (100-x) will be the percentage abundance of carbon-13.
THEREFORE, `(12X)/(100)+(13(100-x))/(100)=12.011`
or `12x+1300-13x=1201.1`
or `x=98.9`
Abundance of carbon -12 is 98.9%.


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