Question

0.25 mole of Mg contains how many atoms?

a 6.022 x 10^23 atoms
b 1.51 atoms
c 0.25 atoms
d 1.51 x 10^23 atoms

Answer 1

5.57 x 10^24 atoms of Mg

Step-by-step explanation:

1 mole = 6.023x10^23 items, by definition. Atoms, in this case.

0.25 moles would be (0.25mole Mg )(6.023x10^23 atoms Mg/mole Mg) = 5.57 x 10^24 atoms of Mg