Chemistry, 23.12.2019 18:31, ringo12384
Consider the following reaction: 2mg(s)+o2(> 2mgo(s) delta h=-1204kj
a) is this reaction exothermic or endothermic? exothermic endothermic
b) calculate the amount of heat transferred when 3.55 g of mg(s) reacts at constant pressure. delta h = -87.9 kj
c) how many grams of mgo are produced during an enthalpy change of -238 kj ? m = ? g
d) how many kilojoules of heat are absorbed when 40.5 g of mgo(s) is decomposed into mg(s) and o2(g) at constant pressure? delta h =? kj
Answers: 1
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Scientists have developed an explanation of a phenomenon from several verified hypotheses. the explanation has been confirmed through numerous experimental tests. which option best describes this explanation? a. scientific lawb. research questionc. hypothesisd. scientific theory
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Chemistry, 22.06.2019 21:20, paatnguyyen
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 .
Answers: 2
Consider the following reaction: 2mg(s)+o2(> 2mgo(s) delta h=-1204kj
a) is this reac...
a) is this reac...
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