7. which hypothesis about the fate of the universe says that all matter will be torn apart as the dark energy in space keeps accelerating faster and faster?
a. the big crunch
b. the big rip
c. the big bang
d. the big chill

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 ->

Electrons are extremely important to what area of technology? a) anti-aging research b) household product development c) electronics d) drug discovery

When water dissociates, each water molecule splits into a hydroxide ion and a) h 3 o + b) a hydrogen atom c) a hydrogen ion d) h 2 o e) oh —