Match the scientific career with the appropriate definition. 1. a scientist who deals with the properties, composition, and reactions of substances
physicist
2. a scientist who studies properties of matter such as gravity, motion and acceleration
marine biologist
3. a scientist who observes and protects dolphins
chemist
4. a scientist who works with the history of the earth and planets that is recorded in rocks
geologist
5. a scientist who studies the origin of living organisms through fossils
paleontologist

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.

What is the polyatamic ion of thiosulfate

Which statement is usually true about the relationship between activation energy and reaction rates? low activation energy barriers result in low rates. high activation energy barriers result in low rates. low activation energy barriers result in no reaction. high activation energy barriers result in no reaction.