Which of the following questions would be answered using concepts from chemistry? a. how do atoms combine to form new substances? b. how much energy was transferred when two cars hit each other? c. how fast will a sled be moving when it reaches the bottom of a hill? d. how much force is required to move a chair?

What is the molar mass of potassium nitrate, kno3

Which statement is true about hcl? (5 points) select one: a. it is a salt because it increases the concentration of metallic ions. b. it is a salt because it is formed by the reaction of an acid and a base. c. it is an acid because it increases the concentration of hydroxyl ions. d. it is an acid because it increases the concentration of hydronium ions.

Which is the solubility product expression for caf2(s)?  [ca2+]/[f–]2  [ca2+][f2–]  [ca]+[f]2  [ca2+][f–]2