1. To increase the temperature of nitrogen at 1atm to 321K, the volume increases from 750 mL to 500 mL, what must the initial temperature of the nitrogen? (pressure is constant)

2. 568 cm3 of chlorine at 25° C will occupy what volume at -25° C while the pressure remains constant?

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.

Select all of the methods through which a drug can enter your body. injection swallowing inhalation absorption

When water dissolves sugar, which process is not involved? o dissociation o hydration o surface area of the solute increases sa