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What does the subscript 2 show in this chemical equation? h2o → 2h o
a. there are 2 oxygen atoms.
b. there are 2 hydrogen atoms.
c. there is half of a hydrogen atom.
d. there are 2 water molecules.

Respuesta :

 there are 2 hydrogen atoms. 
it is right answer that is option B.

Answer: B : There are two hydrogen atoms.

Explanation:In chemical reactions, symbols and formulas represent the substances that are formed or broken down. The formula for water is H2O.

The symbols H and O mean that water contains the elements hydrogen and oxygen. The subscript 2 shows that there are 2 hydrogen atoms in a molecule of water.

Since there is no number beside the O, there must be only one oxygen in the water molecule.

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