9. diamonds and quartz crystals look very similar but diamonds cost considerably
more. give two reasons why diamonds cost more.

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

What is the relation between concentration of reactants and the rate of chemical reaction?

What is the molar mass of a gas that has density of 2.054 g/l