Question

Is there cases where there is no limiting reagent ?
Can you please tell a exa!ple ?

Answer 1

If all the reagents are added in exactly the right mole ratio then all of each reagent is used up, so there is no excess or limiting reagent.

In this case you can use either reagent moles to work out the amount of product formed.

Example:

#2 AgNO_3 + FeCl_2 ----- 2 AgCl(s) + Fe(NO_3)_2#

The mole ratio of #AgNO_3# : #FeCl_2# is 2:1

If you add
2 moles of #AgNO_3# to
1 mole of #FeCl_2#
then both reagents will be fully consumed so neither is limiting.

The reaction will produce
2 moles of #AgCl(s)# and
1 mole of #Fe(NO_3)_2#

Another way to look at this answer is that both reactants are limiting!