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%.

Question

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

Zoey · Accepted Answer

6.940925 amu Can be rounded off to two decimal places as 6.94 amu

DrBob222 · Answer

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) = ??

Arleena · Answer

6.4 aum

Diamond · Answer

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.

Sophia · Answer

6.94amu

Anonymous · Answer

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.