Question

One water molecule has 2 hydrogen atoms to I oxygen atom. How many hydrogen atoms are in 4 water molecules?

Answer 1

1 water molecule is equivalent to 2 hydrogen atoms.

To find how many hydrogen atoms are equivalent to 4 water molecules, we can use the next proportion:

$\frac{1\text{ water molecule}}{4\text{ water molecules}}=\frac{2\text{ hydrogen atoms}}{x\text{ hydrogen atoms}}_{}$

Solving for x:

$undefined$