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4)The equilibrium system below shifts right. This could be caused by .
4HCl(g) + O 2 (g) <> 2Cl 2 (g) + 2H2O (g) + energy
A) a decrease in [O 2 ] B) a temperature decrease C) a pressure decreases D) [H 2 O] increases

5) The equilibrium system below shifts left. This could be caused by .
2NO2 (g) + energy <> N2O4 (g)
A) a temperature decreases B) a pressure increases C) [N 2 O 4 ] decreases D) [NO2 ] increases

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.

The number to the right of an element's symbol (ex. c-12) identifies the of an isotope.

Most materials are not magnetic because their magnetism has worn off. their magnetic domains are arranged randomly. they lack magnetic fields. earth’s heat has destroyed their magnetism.