Question

A typical grocery store plastic bag contains 12.4 grams of ethylene, C2H4, molecules. How many molecules of ethylene are present in such a bag?

Answer 1

Answer: 2.666x10^23 molecules

Explanation:

1 mole of C2H4 = (12x2) + (4x1) = 24 +4 = 28g

1mole( 28g) of C2H4 contains 6.02x10^23 molecules

Therefore, 12.4g of C2H4 will contain = (6.02x10^23 x 12.4) / 28

= 2.666x10^23 molecules