How much water is required to convert 500 ML of 0.3 M solution of NA2S04 into 0.05M?

An aqueous solution of hydroiodic acid is standardized by titration with a 0.186 m solution of calcium hydroxide. if 26.5 ml of base are required to neutralize 20.3 ml of the acid, what is the molarity of the hydroiodic acid solution? m hydroiodic acid

Why is silver chloride is an ionic compound

How many moles are in 7.2 x 10^23 carbon molecules?