1. to calulate the molarity of a solution, you need to know the moles of the solute and the?
a) volume of the solvent
b) volume of the solution
c) mass of the solution
d) volume of the solute
2. which of the following food would not taste acidic?
a) lime
b) tomato
c) orange
d) celery
3. that salt that is formed during the reaction between potassium hydroxide and hydrochloric acid is?
a) hydroxide ions in solution
b) hydrogen ions in solution
c) hydronium ions in solution
d) sodium in solution
you in advance! < 3

You have two photos of a person walking. one shows the person at the corner of third and main streets, the other shows the person at the corner of tenth and main streets. there are lampposts at every corner in this town, and the first picture shows it to be 10: 32: 00 exactly. the second picture shows it to be 10: 49: 30. you know three facts: (1) all of the clocks are synchronized; (2) there are exactly 12 equal-sized blocks per kilometer in this town; and (3) the streets that cross main in this area are numbered consecutively, with no interruptions. what is the person’s average speed in kilometers per hour?