Asked by trisha

Element X has two natural isotopes:X-6 (6.015amu) and X-7 (7.016amu). calculate the atomic mass of element X given the abundance of X-7 is 92.5%.
a)12.5amu
b)6.50amu
c)6.09amu
d)6.52amu
e)6.94amu
Answered by DrBob222
If X-7 is 92.5%, then X-6 must be 100-92.5 = 7.5%
Then 6.015(0.075) + 7.016(0.925) = ??
Answered by Arleena
6.4 aum
Answered by Zoey
6.940925 amu

Can be rounded off to two decimal places as 6.94 amu
Answered by Diamond
Element A has two isotopes. The first isotope is present 17.7% of the time and has a mass of 248.89. The second isotope has a mass of 206.58. Calculate the atomic mass of element A.
Answered by Sophia
6.94amu
Answered by Anonymous
Element X has two naturally occurring isotopes, X-6 which has a percent abundance of 92.41%, and X-7 which has an unknown abundance. Determine the percent abundance of X-7.
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