Mass of empty evaporating dish is 11.4 g, mass of evaporating dish with solution of KCl is 17.4 g, mass of evaporating dish with solid KCl is 13.5 g. Calculate mass of solid KCI.

If anyone would be able to me out with these three questions it would be these are from the chem 2202 course.

Find the mass, in grams, of 5.00*10^23 molecules of f2

Aplanet similar to earth has four moons roughly the same distance away. the moon that will most affect tides on the planet is the one that has the greatest a) mass. b) volume. c) density. d) amount of water.