uranium has 3 common isotopes if the abundanceof 238U is 0.01%

Chemistry
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the abundanceof 235U is 0.715and the abundanceof 238is 99.28% what is the average atomic massof uranium?

Sep 25th, 2015

Thank you for the opportunity to help you with your question!

The Average atomic mass of uranium is obtained by using the following formula: 

Average atomic mass =  mass of isotope × Percent abundance. 

Average atomic mass = 234 ×0.01/100 + 235 ×0.71/100 + 238 ×99.28/100.

Average atomic mass = 0.0234 amu + 1.6685 amu + 236.2864 amu.

Average atomic mass = 237.9783 amu.

The Average atomic mass of the uranium is 237.9783 amu.

Let me know incase you need any further help ! Thanks :)
Sep 25th, 2015

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