Question

If 2.0 moles of A and 5.0 moles of B react according to the hypothetical reaction below, how many moles of the excess reactant will be left over at the end of the reaction?

A + 2B → AB2

0.50 mol A left over
0.50 mol B left over
1.0 mol A left over
1.0 mol B left over
@Abhisar how do you do this?

Answer 1

According to the given reaction 1 mole of A reacts with 2 moles of B so 2 moles of A will react with 4 moles of B and hence will leave 5-4=1 mole of reactant (B) behind.

Answer 2

GOt it ?

Answer 3

yes! then 1.0 mol B left over