Iii. The equation that describes the change in temperature of a solvent due to a solute is ΔTb = i Kb molality. How much salt would one need to add to 1 kg water to change the boiling temperature by 5°C? Give your answer in moles. Show your work. (Kb = ) for water and i = 2 for NaCl.) (2 points)

Lab reagent, hypothesis test. a reference solution used as a lab reagent is purported to have a concentration of 5 mg/dl. six samples are taken from this solution and the following concentrations are recorded: (5.32, 4.88, 5.10, 4.73, 5.15, 4.75) mg/dl. these six measurements are assumed to be an srs of all possible measurements from solution. they are also assumed to have a standard deviation of 0.2, a normal distributin, and a mean concentration equal to the true concentration of the solution. carry out a significance test to determine whether these six measurements provide reliable evidence that the true concentration of the solution is actually not 5 mg/dl.