If you hear on the news that the epicenter of an earthquake is at "Union City," this means: the earthquake started directly below Union City
the earthquake's focus was at the surface in Union City
the earthquake destroyed Union City

Which of these expressions are correct variations of the combined gas law? p1v1t2 = p2v2t1 both

One way in which the useful metal copper is produced is by dissolving the mineral azurite, which contains copper(ii) carbonate, in concentrated sulfuric acid. the sulfuric acid reacts with the copper(ii) carbonate to produce a blue solution of copper(ii) sulfate. scrap iron is then added to this solution, and pure copper metal precipitates out because of the following chemical reaction: (s) (aq) (s) (aq) suppose an industrial quality-control chemist analyzes a sample from a copper processing plant in the following way. he adds powdered iron to a copper(ii) sulfate sample from the plant until no more copper will precipitate. he then washes, dries, and weighs the precipitate, and finds that it has a mass of .

Arrange the elements in order of increasing electronegativity. use the periodic table to you arrange the elements. p o k mg