What is the value of Avogadro's constant?

If i can still dissolve more sugar into the solution at a certain temperature what would i call that solution

Which of the following describes a compound? (hint: carbon and oxygen bo a. a piece of pure carbon, containing only carbon atoms b. oxygen gas surrounding a solid piece of carbon c. a substance made of two oxygen atoms for each carbon atom carbon and oxygen atoms mixed without being bonded together

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