Question

Hydrogen is 99% 1H, 0.8% 2H, and 0.2% 3H. Calculate its average atomic mass.

Answer 1

The average atomic mass of hydrogen (99% H-1, 0.8% H-2, and 0.2% H-3) is 1.012 amu.    

The average atomic mass of hydrogen can be calculated with the following equation:

$A = m_{H-1}\%_{H-1} + m_{H-2}\%_{H-2} + m_{H-3}\%_{H-3}$

Where:

$m_{H-1}$: is the mass of protium (H-1) = 1

$m_{H-2}$: is the mass of deuterium (H-2) = 2

$m_{H-3}$: is the mass of tritium (H-3) = 3

$\%_{H-1}$: is the abundance percent of H-1 = 99%

$\%_{H-2}$: is the abundance percent of H-2 = 0.8%

$\%_{H-3}$: is the abundance percent of H-3 = 0.2%

The average atomic mass is:

$A = 1*99\% + 2*0.8\% + 3*0.2\%$

Changing all the percent values into decimal ones, we have:

$A = 0.99 + 2*0.008 + 3*0.002 = 1.012$

Therefore, the average atomic mass of hydrogen is 1.012 amu.

Learn more about average atomic mass here brainly.com/question/8575403?referrer=searchResults

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