Phosphine, PH3, a reactive and poisonous compound, reacts with oxygen as follows: 4PH3(g) 8O2(g) - P4O10(s) 6H2O(g) If you need to make 6.5 moles of P4O10, how many moles of PH3 is required for the reaction

26 moles of are required for the reaction.

Explanation:

We are given:

Moles of = 6.5 moles

The given chemical reaction follows:

By the stoichiometry of the reaction:

If 1 mole of is produced by 4 moles of

So, 6.5 moles of will be produced by = of

Hence, 26 moles of are required for the reaction.