A hockey player has the puck in the corner of the rink. An opposing player muscles him aside and emerges with the puck. This situation is most analogous to which kind of reaction?
A.
double-replacement
B.
combustion
C.
combination
D.
single-replacement
E.
decomposition

Where are each of the three particles located within the atom?

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.

12. calculate the hydroxide ion concentration of a solution with ph = 3.25. show all calculations leading to an answer