Arrange the following in increasing order (smallest to largest) order of normal boiling point. the normal boiling point of pure water is 100.00 ∘ c and its boiling point elevation constant is 0.512 ∘ c/m c < b < a < d d < a < c < b a < c < b < d b < c < a < d a solution is prepared by dissolving 1.22 g of compound in enough water to make up 262 ml in volume. the osmotic pressure of the solution is found to be 30.3 torr at 35.0 °c. calculate the molar mass of the compound. 257 g/mol 2950 g/mol 3.88 g/mol 44.7 g/mol

The relation between osmotic pressure and molarity of a substance is

π = moles X R X T / volume of solution in litres

π = osmotic pressure

let us convert π  to atm

30.3 torr = 30.3 / 760 atm = 0.0399 atm

T = 35.0 °C = 308.15 K

R = gas constant = 0.0821 L atm / mol K

putting values

0.0399 = moles X 0.0821 X 308.15 / 0.262

Moles = 0.0399 X 0.262 / 0.0821 X 308.15 = 4.132 X 10^-4 moles

Moles  = mass /molar mass

Molar mass = mass/ moles = 1.22 / 4.132 X 10^-4 = 2952.56 g

conduction is the transfer of thermal energy (heat in transfer) due to collisions between the molecules in the object. collisions between adjacent atoms and molecules transfer kinetic energy from the warmer to the cooler object. the objects must be in physical contact.