Answers: 2
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.
Answers: 2
Chemistry, 22.06.2019 03:10
Describe the difference between a. a hypothesis and a theory and b. an observation and an experiment.
Answers: 1
Chemistry, 22.06.2019 06:00
In 1901, thomas edison invented the nickel-iron battery. the following reaction takes place in the battery. fe(s) + 2 nio(oh)(s) + 2 h2o(l) fe(oh)2(s) + 2 ni(oh)2(aq) how many mole of fe(oh)2, is produced when 5.35 mol fe and 7.65 mol nio(oh) react?
Answers: 3
The food that plants produce during photosynthesis is...
Biology, 19.05.2020 15:57
English, 19.05.2020 15:57
Geography, 19.05.2020 15:57
Mathematics, 19.05.2020 15:57
Mathematics, 19.05.2020 15:57
Mathematics, 19.05.2020 15:57
Chemistry, 19.05.2020 15:57
Mathematics, 19.05.2020 15:57
Mathematics, 19.05.2020 15:57
Mathematics, 19.05.2020 15:57
Mathematics, 19.05.2020 15:57
Mathematics, 19.05.2020 15:57
Chemistry, 19.05.2020 15:57