A reaction produces 2.5 moles of CO2 gas at STP. What is the volume of CO2 gas produced
in the reaction?

Given :

A reaction produces 2.5 moles of CO2 gas at  STP.

To Find :

The volume of CO2 gas produced  in the reaction.

Solution :

We know, in STP 1 mole of a gas contains 22.4 L of volume.

So, 2.5 moles of CO2 will produce :

Therefore, volume of 2.5 moles CO2 is 56 L.

Hence, this is the required solution.

what are the choices?

the answer is definitely c.