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Helga [31]
3 years ago
11

hydrogen is found primarily as two isotopes in nature: (1.0078u) and (2.0140u). Caluclate the percentage abundance of each isoto

pe based on hydrogens average atomic mass
Chemistry
1 answer:
kotegsom [21]3 years ago
8 0
<span>hydrogens average atomic mass = 1,01u

x = isotope about mass </span><span>(1.0078u)
y = isotope about mass </span><span>(2.0140u)
</span><span>
x + y = 100%
so:
x = 100% - y

</span>hydrogens ~average~atomic~mass=\frac{(1.0078\cdot x)+(2.0140\cdot y)}{100}\\&#10;1.01=\frac{(1.0078\cdot (100-y))+(2.0140y)}{100}||\cdot 100\\&#10;101=100.78-1.0078y+2.0140\\&#10;101-100.78=1.0062y\\&#10;0,22=1.0062y||:1.0062\\&#10;0.219\%=y\\\\&#10;x=100\%-y\\&#10;x=100\%-0.219\%\\&#10;x=99.781\%\\\\&#10;
<span>
answer:
</span>x=99.781\%\\&#10;y=0.219\%<span>




</span>
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