How many atoms are in H20?

Answer 1

In one molecule of water, there are 2 atoms of hydrogen for every atom of oxygen. So in one molecule, there is a total of 3 atoms.

plus if there are more water molecules then you can just do the math.

(ex.5 molecules of water=5 x 3 = 15 atoms )

(ex.18 molecules of water = 18 x 3 =54 atoms)

Answer 2

A molecule of water (H2O) contains 3 atoms. The subscript after the "H" means there are 2 hydrogen atoms. A subscript in chemistry describes whatever element (or group of elements in parentheses) that are immediately before it. No subscript after the "O" means there is only 1. So, 2+1=3 atoms.

Answer 3

Three. The answer to the number of atoms in one molecule of any compound can be found by adding the subscripts of all the atoms in the chemical formula of the compound, including the implicit subscript 1 for atoms that have no explicit subscript, after multiplying the subscript numbers for atoms within parentheses in the formula by any explicit subscript at the end of the parentheses.

Answer 4

2 hydrogen atoms and 1 oxygen atom, totally 3 atoms.

Answer 5

Three. Two hydrogen, one oxygen

Answer 6

Three, two Hydrogen atoms and one oxygen atom.

Answer 7

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