If 0.0490 mol of solid CaCO3 and 380 mL of 0.135 M aqueous H2SO4 are reacted, what volume (L) of gaseous CO2 measured at 1.1 atm pressure and 301 K is produced.

Question

H2SO4(aq) + CaCO3(s) → CO2(g) + CaSO4(s) + H2O(l)

Answer 1

This is a limiting reagent problem. How do I know? Because BOTH reactants are given.
Convert 380 mL of 0.135 M H2SO4 to moles. moles = M x L. You already have moles CaCO3.

Using the coefficients in the balanced equation, convert moles CaCO3 to moles CO2.
Same process, convert moles H2SO4 to moles CO2.
The two answers probably will not agree which means one of them is wrong; the correct answer in limiting reagent problems is ALWAYS the smaller value and the reagent producing that value is the limiting reagent.
Use that smaller value and PV = nRT to solve for the volume at the conditions listed.