Which chemical equation represents the reaction of an arrhenius acid and an arrhenius base?
(1) hc2h3o2(aq) + naoh(aq) --> nac2h3o2(aq) + h2o(l)
(2) c3h8(g) + 5 o2(> 3 co2(g) + 4 h2o(l)
(3) zn(s) + 2 hcl(> zncl2(aq) + h2(g)
(4) bacl2(aq) + na2so4(aq) --> baso4(s) + 2 nacl(aq)

1. suppose a reaction mixture, when diluted with water, afforded 300 ml of an aqueous solution of 30 g of the reaction product malononitrile [ch2(cn)2], which is to be isolated by extraction with ether. the solubility of malononitrile in ether at room temperature is 20.0 g/100 ml, and in water is 13.3 g/100 ml. what weight of malononitrile would be recovered by extraction with (a) three 100-ml portions of ether and (b) one 300-ml portion of ether? suggestion: for each extraction, let x equal the weight extracted into the ether layer. in part (a), the concentration in the ether layer is x/100 and in the water layer is (30 x)/300; the ratio of these quantities is equal to k 20/13.3.

Turbo the snail moves across the ground at a pace of 12 feet per day. if the garden is 48 feet away, how many days will it take for the snail to get there?

An electron moved from shell n = 2 to shell n = 1. what most likely happened during the transition? a fraction of a photon was added. a photon of energy was absorbed. a fraction of a photon was removed. a photon of energy was released.