Which of the following is an example of poetential energy changing into kinetic energy ?

a. a girl climbing up a hill
b. a fruit falling from a tree
c. a car stopping when the brake is applied
d. a child on a swing slowing down as she swings upwards

Write a net ionic equation to show that hydrofluoric acid, behaves as an acid in water.

14. complete and balance the equations for the single displacement reactions. a. zn + pb(no3)2 -> b. al + niso4 -> 15. complete and balance the equations for the double displacement reactions. a. agno3(aq) + nacl(aq) -> b. mg(no3)2(aq) + koh(aq) -> 16. complete and balance the equations for the combustion reactions. a. __ ch4 + o2 -> b. __ c3h6 + o2 -> c. + o2 ->

Determine the percent sulfuric acid by mass of a 1.61 m aqueous solution of h2so4. %