5) Calculate the molality of 0.210 mol of KBr dissolved in 0.075kg pure
water.

2.8 m

Explanation:

Step 1: Given data

Step 2: Calculate the molality of the solution

Molality is a unit used to express the concentration of a solution. It is equal to the moles of solute divided by the kilograms of solvent.

m = moles of solute / kilograms of solvent

m = 0.210 mol / 0.075 kg

m = 2.8 mol/kg = 2.8 m

the formula for the conversion of temperature from degree celsius to kelvin is:

the sample of water at is converted to kelvin temperature by using the above formula as:

on comparing the two samples of water at or we can say that at and at respectively. the difference between the temperatures of two samples of water is:

hence, one can say that the sample of water at is greater than the sample of water at by .