AP EAMCET20228 Jul 2022Morning ShiftChemistryStates of MatterActual
What is the density of one mole of He (molar mass =4 ~g . mol ⁻¹ ) at 300 ~K and a pressure of 0.82 ~atm ?( R =0.082 ~L . atm mol ⁻¹ ~K ⁻¹ )
Options
- A1.33 10⁻² ~g ~mL ⁻¹
- B1.33 10⁻² ~g ~L ⁻¹
- C1.33 10⁻¹ ~g ~L ⁻¹
- D1.33 10⁻¹ ~g ~mL ⁻¹
Correct answer
C. 1.33 10⁻¹ ~g ~L ⁻¹
Step-by-step solution
From ideal gas equation, PV = nRT or, PM = dRT [ d = density of gas and M = molecular/atomic weight of the gas] d = PM RT = 0.82 4 0.082 300 = 4 30 =1.33 10⁻¹ gL ⁻¹