If a chemist has 2.3 moles of arsenic (as) that has a molar mass of 74.92 g/mol, which would be the best way to find out how many atoms of arsenic are in the sample? multiply 2.3 by avogadro's number. divide 2.3 by avogadro's number. multiply 2.3 by the molar mass of arsenic. divide 2.3 by the molar mass of arsenic.

How many moles of potassium hydroxide are needed to completely react with 2.94 moles of aluminum sulfate

When the mercury level in a barometer decreases that atmospheric pressure has

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 .