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Chemistry, 22.06.2019 01:20
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.
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Chemistry, 22.06.2019 06:30
Identify the missing numbers below to show the result of multiplying the numbers (1.6 Γ 10-19)(5.0 Γ 106) = c Γ 10d
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Chemistry, 22.06.2019 10:50
How many liters of oxygen gas, at standard temperature and pressure, will react with 35.8 grams of iron metal? 4 fe (s) + 3 oβ (g) β 2 feβoβ (s)
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