Question

How many atoms are in a sample of 68.7 grams copper (Cu)?
Select one:
a. 1.80 × 10-24 atoms
b. 7.25 × 10-21 atoms
c. 6.51 × 1023 atoms
d. 2.63 × 1027 atoms

Answer 1

@ash2326

Answer 2

68.7 g Cu X (6.022 x 10^23 atoms Cu)/63.55 g Cu

6.51 × 10^23

Answer 3

so its c