Which substances are acids? Check all that apply. (1)AgOH
(2)HF
(3)NiOOH
(4)NH4OH
(5)HMnO4
(6)Zn(OH)2

Which pair of sentences is describing the same velocity? a. a car is parked. a car is moving in circles. b. a bus drives 40 miles per hour north. a truck drives 50 miles per hour north. c. a boy walks east at 6 kilometers per hour. a girl walks west at the same speed as the boy. d. valerie rides her bike south at 8 kilometers per hour. owen jogs south at 8 kilometers per hour.