The level of carbon dioxide was measured in a garden and on a city road. where do you think the carbon dioxide level will be higher and why?
a. the carbon dioxide level will be same at both places because the amount of carbon dioxide at all places on the earth is the same.

b. the carbon dioxide level in the city will be higher because the exhaust gases from vehicles release carbon dioxide and there are not many trees to utilize it.

c. the carbon dioxide level in the garden will be higher because of the many plants present which are constantly releasing carbon dioxide by photosynthesis.

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 .