Nitrogen has a density of 1.17 x 10^-3 g/cm^3. if you have 2,500 cm^3 of nitrogen gas, which of the following is the correct mass of nitrogen, using significant figures?

a. 2.92 g

b. 2.2 x 10^6g

c. 14 x 10^6g

d. 2.9 g

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.

This classification of drug typically changes the brain's chemistry and reduces its ability to create its own endorphins.

Many pharmaceutical drugs are organic compounds that were originally synthesized in the laboratory. which two scientific disciplines are bridged by pharmaceutical drugs? chemistry and forensics chemistry and medicine biology and forensics biology and criminology