From the following enthalpy changes,
2PCl3(l) → 2P(s) + 3Cl2(g) ∆H = -640 kJ
2P(s) + 5Cl2(g)...
Answers: 1
Chemistry, 22.06.2019 01:20, whrjegt4jrnfdvj
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.
Answers: 2
Chemistry, 22.06.2019 07:30, kimberlyrios12p0ts98
Which of the following best supports the concept that genetic information is passed on to offspring from both of their parents, not just one?
Answers: 2
Chemistry, 22.06.2019 23:30, lizdeleon248
The sum of the oxidation numbers in a neutral compound is always
Answers: 2
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