Chemistry HELP get 10 points?

Question

7) Determine the number of atoms in the following:
a. 2.50 mol Zn b. 1.50 g C

Answer 1

7a) Number of atoms in 2.5 moles of Zinc:

N.atoms = 2.5 moles X 6.02 x10^23 atoms/mol = 1.505 x 10^24 atoms

7b) Number of atoms in 1.5 g of Carbon:

moles of C = 1.5 g / 12 g/mol = 0.125 moles

N. atoms = 0.125 moles x 6.02x10^23 atoms/mol = 7.52 x 10^22 atoms

Good luck!

Answer 2

a.15,0575*10AT POWER23 atoms
b.9,0345*10at power 23 atoms

Answer 3

a. 2.5 * 6.02 * 10^23
b. (atomic weight C / 1.50g) * 6.02 * 10^23