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

4.716x10^25

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

a is the answer to this question

explanation:

periodic trends is an atom that gets larger as the number of electronic shells increase, the radius of atoms increases as you go down a certain group in the periodic table of elements. in general, the size of an atom will decrease as you move from left to right of a certain period.