Which of the following reactions describes the solubility equilibrium of silver bromide (AgBr) in water (H2O)?

AgBr(s) ⇌ Ag+(aq) + Br–(aq)
2AgBr(s) ⇌ 2Ag(s) + Br2(g)
AgBr(s) ⇌ Ag(s) + Br–(aq)
2AgBr(s) ⇌ Ag2(g) + 2Br–(aq)

Which of the following pairs of elements is most likely to form an ionic compound? a oxygen and fluorine b sodium and aluminum c calcium and chlorine d nitrogen and sulfur

4al + 3o2 → 2al2o3 what does the "3" in front of o2 stand for? a) it indicates that there are 5 oxygen atoms after you add the coefficient and the subscript. b) it indicates that that there are are total of 6 oxygen atoms all bonded together as a single molecule. c) it indicates that there are 3 oxygen molecules chemically bonded to each other in the reaction. d) it indicates that there are 3 separate oxygen molecules in the reaction.

What mass of ca(oh)2 is needed to make 1250ml of a .75m solution?