Assuming ideal behavior, which of these gas samples has the greatest volume at stp? assuming ideal behavior, which of these gas samples has the greatest volume at stp? 1 g of o2 1 g of h2 1 g of ar

Data Given:
                  Temperature  =  273 K
                  
                   Pressure       =  1 atm

                  Mole of O₂     =  1 g / 32 g.mol⁻¹  =  0.03125 mol

                  Mole of H₂     =  1 g / 2.016 g.mol⁻¹  =  0.0496 mol

                  Mole of Ar     =  1 g / 39.94 g.mol⁻¹  =  0.025 mol

Solution:
As Ideal Gas Equation is given as,

                                   P V  =  n R T
Solving for V,
                                      V  =  n R T / P

Solving for O₂;
               
              V  = (0.03125 mol × 0.08205 atm.L.mol⁻¹.K⁻¹ × 273 K) ÷ 1 atm

              V  =  0.699 L

Solving for H₂;
               
              V  = (0.0496 mol × 0.08205 atm.L.mol⁻¹.K⁻¹ × 273 K) ÷ 1 atm

              V  =  1.11 L

Solving for Ar;
               
              V  = (0.025 mol × 0.08205 atm.L.mol⁻¹.K⁻¹ × 273 K) ÷ 1 atm

              V  =  0.55 L

Result:
            The correct answer is H₂. 1 g of H₂ occupies more volume as compare to 1 g of O₂ and 1 g of Ar.