Question

Suppose a container holds 1000 hydrogen molecules and 1000 oxygen molecules that react to form water. how many water molecules will be left in the container?

Answer 1

The reaction is:

`H_(2) + (1)/(2) O_(2) = H_(2)O`

From the equation, he limiting reactant is the oxygen. Assuming 100% yield, all of the oxygen must react to form water.

1000 mol
`O_(2)` * (1 mol
`H_(2)O` ÷ ½ mol
`O_(2)`) = 2000 moles water produced