Which of the following represents the number of moles of a solute in one liter of a solution?

1. density
2. molarity
3. percent by mass
4. volume

question 2

the ph of a solution is 2.60. what is the [h3o+] for the solution?

1. 2.51 × 102 m
2. 3.98 × 102 m
3. 2.51 × 10−3 m
4. 3.98 × 10−3 m