ANSWER ASAP PLEASE True or False:
Pick up evidence weapons by placing a pencil in the end of the barrel to avoid damaging fingerprint evidence.

True or False:
Never submit a loaded gun to the laboratory.

True or False:
Bullets recovered from a body should immediately be placed in pill bottles.

True or False:
Place evidence weapons in well packed, strong cardboard or wooden boxes.

True or False:
Gunshot residue lingers on the clothing of a shooter and can be collected days after a crime has been committed.

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 .