Question

How many molecules of H2O are contained in 78.34 grams?

6.342 X 1019 molecules


2.618 X 1024 molecules


5.634 X 1025 molecules


9.984 X 1022 molecules


1.198 X 1026 molecules

Answer 1

4.716x10^25

Step-by-step explanation:

1 molecule of water is equivalent to 6.02x10^23

hence 78.34 is equivalent to 78.34x6.02x10^23

and the answer is 4.716x10^25