Answer to Question #142630 in General Chemistry for Hadden

Question

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

Answer 1

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.