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

why do the isotopes of a particular element behave differently in nuclear reactions but the same in chemical reactions? chemical reactions involve changes to electrons in an atom; isotopes do not differ in electrons, and so they react the same way during chemical changes.