Question

2B + 3H2 2BH3
How many moles of BH3 are synthesized when 27.0 moles of H2 completely react?

Answer 1

Answer: 18.0 moles of
`BH_3` will be produced when 27.0 moles of
`H_2` completely react.

Step-by-step explanation:

The balanced chemical equation is:

`2B+3H_2\rightarrow 2BH_3`

According to stoichiometry :

3 moles of
`H_2` produce = 2 moles of
`BH_3`

Thus 27.0 moles of
`H_2` will produce=
`(2)/(3)* 27.0=18.0 moles` of
`BH_3`

Thus 18.0 moles of
`BH_3` will be produced when 27.0 moles of
`H_2` completely react.