Which reaction occurs spontaneously?
(1) cl2(g) + 2nabr(> br2(l) + 2nacl(aq)
(2) cl2(g) + 2naf(> f2(g) + 2nacl(aq)
(3) i2(s) + 2nabr(> br2(l) + 2nai(aq)
(4) i2(s) + 2naf(> f2(g) + 2nai(aq)

An alloy contains 66 g of pure zinc. what is the percentage of zinc in the alloy? express your answer to two significant figures and include the appropriate units.

We are hoping to create 5.72 grams of glucose. the plant was given 4.75 liters of co2 and 2.81 g of h20. which reactant was the limiting reagent? how much excess mass did we have of the other reactant?

Find the missing probability in the table below a.0.10 b.40 c.0.80 d. 0.20