In a room, air is at 50°C and total pressure of 750 mmHg. The partial of water is 20 mm Hg and the vapor pressure of water at 50°C and 50 mmHg. Calculate percentage humidity and percentage relative humidity? a) percentage humidity = 6.66%, percentage relative humidity = 2.66% b) percentage humidity = 2.66 %, percentage relative humidity = 6.66% c) percentage humidity = 40%, percentage relative humidity =38.35 % d) percentage humidity =38.35%, percentage relative humidity = 40% A 500 kg of MgSO4.7H₂O crystals and mother liquor at 30°C are obtained from the cooling of 20wt% of MgSO4 solution at 50°C. The solubility of MgSO4 at 30°C is 20 parts MgSO4 per 100 parts of water. Calculate the mass of the mother liquor. The molar masses of MgSO4 and MgSO4.7H2O are 120.36 and 246.47 mol mol respectively. a) 2735.29 kg b) 2235.29 kg c) 4735.29 kg d) 4235.29 kg The elementary gas phase reaction, 2AB is carried out in a flow reactor where pure A is fed at a concentration of 5.0 mol/dm³. The equilibrium conversion is found to be 70%. What is the equilibrium constant, Ko if the reaction is a gas phase reaction? a) 0.32 dm³/mol b) 0.34 dm³/mol c) 0.72 dm³/mol d) 0.72 dm³/mol