How many molecules are there in 5H20?
A.5
B.7
C.10
D.11

I believe 11.

Since the first 5 is in the outside, it’s 5 times the number.

In H2O there are already 2 hydrogen and 1 oxygen molecule, totaling to 3.

When you put 5 H2’s, and add them, that would equal 10 molecules, plus the O on the end, would equal 11.

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