Question

How many oxygen atoms and are present in this water molecule 2H2O?

(note* the number 2 after H is a subscript)

Answer 1

4. Hydrogen atoms and 2 oxygen atoms

Answer 2

Answer: 4 hydrogen atoms and 2 oxygen atoms.

Step-by-step explanation:

For example, two water molecules (2H2O) contain 2 • 2 = 4 hydrogen atoms and 2 • 1 = 2 oxygen atoms.