Mole question!!!!?

Question

If two moles (a mole is 6.023 x 1023molecules) of oxygen atoms weigh 3.20 x 101 g, how much does each oxygen atom weigh on average?

Answer 1

1 mole equals 6.023 x 10^23 atoms

in this case 2 moles equals 2 times 6.023 x 10^23 atoms which equals 1.2045 x 10^24 atoms

2 moles of oxygen is 32.00 grams

32.00g divided by 1.2045 x 10^24 is 2.65648 x 10 ^-23 grams per atom of O2 gas.

If you teacher wants it in significant figures then the answer is

2.656 x 10^-23 grams per atom of O2 gas.

Answer 2

in this case 2 moles equals 2 times 6.023 x 10^23 atoms which equals 1.2045 x 10^24 atoms

2 moles of oxygen is 32.00 grams

32.00g divided by 1.2045 x 10^24 is 2.65648 x 10 ^-23 grams per atom of O2 gas.

If you teacher wants it in significant figures then the answer is

2.656 x 10^-23 grams per atom of O2 gas.

Answer 3

5.3x10^-23 a.m.u.