Chemistry, 05.10.2019 00:30 Aylin042277
Before free oxygen gas became abundant in the oceans and atmosphere, it reacted with a metal and produced what type of formations?
a. the ionosphere
b. the ozone layer
c. banded iron formations
d. stromatolites
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 01:30
Arollercoaster car at the top of a hill has potential energy kinetic energy chemical energy light energy
Answers: 1
Chemistry, 22.06.2019 06:30
Summarize possible ways in which phases of matter could combine to form a solution.
Answers: 2
Before free oxygen gas became abundant in the oceans and atmosphere, it reacted with a metal and pro...
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