At 298 K, 500cm3 H2O dissolved 15.30 cm3 CH4(STP) under a partial pressure of methane of one atm. If Henry's law holds, what pressure is required to cause 0.001 mole methane to dissolve in 300cm3 water ?
1. 0.29 atm
2. 2.33 atm
3. 1.29 atm
4. 3.11 atm
The partial pressure of ethane over a saturated solution containing 6.56 X 10-2 g of ethane is 1 bar. If the solution contains 5.00 X 10-2 g of ethane, then what shall be the partial pressure of the gas?
1. 0.76 bar
2. 0.16 bar
3. 1.16 bar
4. 3.12 bar
An aqueous solution of 2 percent non volatile solute exerts a pressure of 1.004 bar at the boiling point of the solvent. What is the molecular mass of the solute ?
1. 9.19 g mol-1
2. 41.3 g mol-1
3. 71.2 g mol-1
4. 50.4 g mol-1
Nalorphene (C19H21NO3), similar to morphine, is used to combat withdrawal symptoms in narcotic users. Dose to nalorphene generally given is 1.5 mg. Calculate the mass of 1.5 X m aqueous solution required for the above dose is?
1. 3.2 g
2. 0.2 g
3. 5.1 g
4. 7.3 g
Determining the normality of a solution with a density of 0.6 g/ml and composed of 35% NH4OH by mass.
1. 4.8 N
2. 10 N
3. 0.5 N
4. 6 N