Express the product of 5.4 mm and 6.02 mm using the correct number of significant digits. a. 32 mm^2b. 33 mm^2c. 32.5 mm^2d. 32.51 mm^2

In which chemical equation, which symbol should be used to indicate that substance is in solution?

Asample of radium-226 will decay 1/4 of its original amount after 3200years. what is the half-life of radium-226?

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.