Element X has two natural isotopes: X-6 (6.015 amu) and X-7 (7.016 amu). Calculate the atomic mass of element X given the abundance of X-7 is 92.5%

The atomic mass of element X is 6.941 amu.

Explanation:

The atomic mass of the element X is given by:

We have that the abundance of X-7 is 92.5%, so the abundance of X-6 is:

Hence, the atomic mass of element X is:

Therefore, the atomic mass of element X is 6.941 amu.

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nacl is added to the aqueous of what? ? in order to get a proper answer you have to specify the exact composition of the aqueous solution.