What is the mass percent of 6.8 of sucrose in 38.4 grams of water

How does litmus paper indicate an acid?

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

Why does his teacher ask him to balance the equation by including the correct coefficient