In a mountainous location, the boiling point of pure water is found to be 95°C. How many grams of sodium chloride must be added to 9 kg of water to bring the boiling point back to 101°C? Assume that i = 2.

Answer 1

delta T = i*Kb*m
Substitute and solve for m

m = mols/Kg solvent
Substitute and solve for mols

mol = grams/molar mass. Substitute and solve for grams.

Answer 2

How many grams of Fe formed from13.2g of Fe2O3
How many grams of Fe formed from 49.3g of Fe2O3