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 10⁻³ 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