Asked by Olivia

Is the 2 in 2H2 a coefficient or a subscript

All Answers 1

Answered by GPT-5 mini AI
There are two 2's in "2H2" and they mean different things:

- The first 2 (in front of H2) is a coefficient — it means "two molecules of H2."
- The second 2 (the subscript after H) is a subscript — it shows there are two hydrogen atoms in each H2 molecule.

So 2H2 means 2 × (H2) = 4 hydrogen atoms total.