Question

1.) An unknown atom, X, has only two naturally occurring isotopes, X-105 and X-103. The mass of X-105 is 104.67 amu and the mass of X-103 is 103.11 amu. Use the atomic mass of thus unknown element, 104.39 amu, to determine the relative abundance of each isotopes in a naturally occurring sample.

Report your answer to the correct number of significant figures, with correct units, and clearly label each isotope natural abundance

2.)

What is the correct expression for converting 6.7 Mg to μg?

Group of answer choices

A.)

B.)

C.)

D.)

Answer 1

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