PLEASE HELP
The product of the reaction between sodium fluoride and bromine liquid is
a. NR
b. 2NaF(aq) +Br (l) ► 2NaBr(aq) +F(g)
c. NaF(aq) +Br(l) → NaBr(aq) + F(g)
d. Br2(l) + 2NaF(aq) + 2BrF(aq) + 2Na(s)

Which property of a rock remains unchanged by mechanical weathering? a. total surface area b. size and shape c. mineral composition d. sharpness

How is energy related to the change of state represented by the model? atoms gain energy as a solid changes to a liquid. atoms gain energy as a solid changes to a gas. atoms lose energy as a solid changes to a liquid. atoms lose energy as a solid changes to a gas.

Salt in oceans comes from and of rocks