3 years ago

Which can associate a suspect and the firing of a gun?

1 answer:

5 0

D. powder residues.
the police and forensic chemists usually perform a qualitative test called GPR or gun powder residue. the residue sticks to the skin.

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Which element are cations? how do you know?

Paladinen [302]

If it has a positive charge it is a cation if negative it is an anion .

I attached a chart that will help you know the charges of the elements

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<span>The Mechanical energy in a mechanical system is determined by adding the potential and kinetic energy together. </span>

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igor_vitrenko [27]

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3 years ago

Tollens’ test, also known as silver-mirror test, is a qualitative laboratory test used to distinguish between an aldehyde and a

Makovka662 [10]

Explanation:

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Step 1:

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$AgNO_3 + NaOH &\rightarrow AgOH + NHO_3 \nonumber \\ 2AgOH &\rightarrow Ag_2O + H_2O$

Step 2

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$Ag_2O + 4NH_3 + H_2O \rightarrow 2Ag(NH_3)_2^+ + 2OH^-$

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