Question

2.5 moles of oxygen react with 3.5 moles of hydrogen according to the following balance equation: 2H2 + 1 O2 —> 2 H2O. What is the ratio of limiting reactant started with/limiting reactant needed?

Answer 1

Answer:

limiting reactant started with/limiting reactant needed=

= 3.5 mol/3.5 mol=1:1

Explanation:

                                       2H2 +   1 O2 ---> 2 H2O

from reaction                 2 mol      1 mol

given                              3.5 mol    2.5 mol

needed                          3.5 mol    1.75 mol

Excess reactant O2, Limiting reactant H2.

Limiting reactant will be used completely.

So,  limiting reactant started with/limiting reactant needed=

= 3.5 mol/3.5 mol=1:1