Question 9
1 pts
A gas of 3.4 moles occupies a volume of 0.046 Lat 298 K. What is the pressure
in kPa?
O 4.40 x 100 kPa
O 9.45 x 103 kPa
O 6.1 x 102 kPa
O2.1x 105 kPa
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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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