An ionic bond for calcium and oxygen is cao. if an oxygen ion has a charge of two negative, what is the charge for calcium?

a: +2

b: –1

c : +1

d : -2

Which quantities are scalars? choose all that apply a.distance b.speed c. acceleration d.velocity

Which is the best for showing percentages of different types of cars sold(gas hybrid , electric , other ) in the united states ?

Edward tolman explained the results of his study by theorizing that the rats were learning about the maze during every trial but they a. were agitated because other groups were getting reinforcement b. could not remember how to demonstrate it without reinforcement c. were not motivated to demonstrate it without reinforcement d. seemed to be too lazy to actually work without reinforcement