An experiment is performed to measure the mass percent of CaCO, (s) in eggshells. Five different samples of Cacos (s) of known mass remer with an excess of 2.0 M HCl(aq) in identical scaled, rigid reaction vessels.
The pressure of the gas produced is measured with a pressure gauge attached to the reaction vessel. Since the
reaction is exothermic, the reaction system is cooled to its original temperature before the pressure is recorded. The

Which answer lists the fundamental forces in order from strongest to weakest

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.

When a septic tank backs up a goes in to clean it out