What does Avogadro's number represent? A. How much 1 atom of a substance weighs. B. The number of molecules in 1 mole of a substance. C. The number of molecules in 1 atomic number of a substance. D. How much 1 mole of a substance weighs.

An aqueous solution of potassium hydroxide is standardized by titration with a 0.194 m solution of hydrobromic acid. if 25.2 ml of base are required to neutralize 24.2 ml of the acid, what is the molarity of the potassium hydroxide solution? m potassium hydroxide

The twister and runaway train are two coasters at the same amusement park. both coasters start at the same height. the coaster for the twister is twice the mass of the coaster for the runaway train. which roller coaster has greater gravitational potential energy at the start of the ride?

What is the ph of a solution that has a hydrogen ion concentration of 1.0 * 10 -9 m?