Answer to Question #142630 in General Chemistry for Hadden

General Chemistry

Question #142630

3.011 x 10^22 atoms of an element weight 1.15 gm. What is the atomic mass of the element?

Expert's answer

At first, number of moles should be found:

n=N/N_a

n=3.011×10²²/6.022×10²³=0.05(mol)

M=m/n=1.15/0.05=23(g/mol)

So, we may assume that this element is Sodium.

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