Question

If you burn 29.4 g of hydrogen and produce 263 g of water, how much oxygen reacted?

Answer 1

The reaction between hydrogen and oxygen to form water is given as:

`H_2 + O_2 \rightarrow H_2O`

The balanced reaction is:

`2H_2 + O_2 \rightarrow 2H_2O`

According to the balanced reaction,

4 g of hydrogen (
`4* 1`) reacts with 32 g of oxygen (
`2* 16`).

So, oxygen reacted with 29.4 g of hydrogen is:

`(29.4* 32)/(4) = 235.2 g`

Hence, the mass of oxygen that is reacted with 29.4 g of hydrogen is 235.2 g.