If the mole fraction of na2s in an aqueous solution is 0.125, what is the weight/weight % (percent by mass ) of na2s

What is the mass of each element in a 324.8 sample of co2

Ted and emily played a mixed doubles tennis match against jack and brenda. in the second match. ted and brenda played against jack and emily. which type of chemical reaction does the situation demonstrate?

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