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: fe(s)+cuso4(aq)→cu(s)+feso4(aq)supp ose an industrial quality-control chemist analyzes a sample from a copper processing plant in the following way. he adds powdered iron to a 200.ml 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 95.mg. calculate the original concentration of copper(ii) sulfate in the sample.

0.0075 M

Explanation:

Mass of copper metal recovered:

Molar mass of copper should be used in this problem in order to convert the mass of copper into moles of copper:

According to the balanced chemical equation, 1 mole of copper(II) sulfate produces 1 mole of copper metal, this means, when we find the number of moles of copper metal, this will be equivalent to the number of moles of copper(II) sulfate. Dividing the number of moles of copper(II) sulfate by the volume of the solution in liters will yield the molarity needed.

Firstly, the number of moles of copper (and copper(II) sulfate):

Given a volume of:

We obtain a molarity of:

definition

                    entropy is a measure of the randomness or the extent of disorder of a chemical process.

                      enthalpy is a measure of the heat change of a reaction occurring at a constant pressure.

measurement units:

                        entropy is measured in joule per kelvin (jk⁻¹)   whereas enthalpy is measured in joule per mole (jmol⁻¹)

requirements:

                            entropy has no requirements or limits, and its change is measured by the division between the heat change of the chemical process and the temperature.

                              in contrast, enthalpy can only be related to the heat change of the reaction under standard conditions.

answer: any goods being imported from another country may be subject to issued by the federal government are tariffs

explanation:  

tariffs are a tax on anything that are imported from abroad. government use them to protect and boost their local industries and the thought is that they encourage consumers to buy local instead of importing and they will hope will protect jobs and economy in the country that implements them