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Use data given in the following table to...

Use data given in the following table to calculate the molar mass of naturaly occuring argon isotopes:
`{:("Isotope",,"Isotopic molar mass",,"Abundance"),(.^(36)Ar,,35.96755 g mol^(-1),,0.337%),(.^(38)Ar,,37.96272 g mol^(-1),,0.063%),(.^(40)Ar,,39.9624 g mol^(-1),,99.600%):}`
(Round of the answer to the nearest whole number ).

Text Solution

Verified by Experts

The correct Answer is:
40
(At wt.) `"avg"=(M_(1)x_(1)=M_(2)x_(2)+M_(3)x_(3))/(x_(1)+x_(2)+x_(3))`
`=(35.96755xx0.337+37.96272xx0.063+39.9624xx99.6)/(100)`
`=39.94`
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