What would the volume of a gas be at -125°C, if it had a volume of 693 mL at 45°? A -1,925 mL b. 322.5 mL c. 2,279 mL d. 15.4 mL

Which of the following pairs of elements belong to the same groupa. h and he b. li and bec. c and pb d. ga and ge

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 does the cell nucleus do or, how does it function?