Calculate the number of moles of h2 gas collected over water that filled a graduated cylinder with 75.2 ml of gas at a temp perature of 19c and an atmospheric pressure of 749 torr. the vapor pressure of water at 19c = 16.48 torr. r = 62.363
i got .00309 mol h2, but missed one point on this question. not sure what i did wrong. will someone me step by step, ? you so much.

At stp, what is the volume of 1 mole of co2?

Achemist wants to extract copper metal from copper chloride solution. the chemist places 0.50 grams of aluminum foil in a solution containing 0.75 grams of copper (ii) chloride. a single replacement reaction takes place. (ii) chloride. a single replacement reaction takes place. which statement explains the maximum amount of copper that the chemist can extract using this reaction? a) approximately 0.36 grams, because copper (ii) chloride acts as a limiting reactant b) approximately 1.8 grams, because copper (ii) chloride acts as a limiting reactant c) approximately 0.36 grams, because aluminum acts as a limiting reactant d) approximately 1.8 grams, because aluminum acts as a limiting reactant

Which describes fat? a: a carbohydrate that produces energy b: a nucleic acid that directs cell function c: a lipid that stores energy d: a protein that speeds up a chemical reaction