Match each molecular formula to the corresponding empirical formula. CAH,02 C4H1204 C₂H100₂ CH3O
CH5O
C2H4O​

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.

How many grams of co(g) are there in 74.5 ml of the gas at 0.933 atm and 30o c?

Concentrations expressed as a percent by mass are useful when the solute is a a. liquid b. gas c. solid