Question

Which of the following techniques involves separating volatile chemical into their components?

a. UV spectrophotometry
b. DNA analysis
c. Gas chromatography
d. Infrared spectrophotometry

Answer 1

volatile compounds are compound that turn into gases at room temperatures, like acetone.

Answer 2

Also, apply your last question. What did I say spectrophotmetry does vs. chromography. One separated and the other just identified lights interactions with a substance.

Answer 3

is this one a?

Answer 4

*c?

Answer 5

You have it now.

Answer 6

I have one more Q.
In the paints and polymers division of a crime lab, which of the following might you observe?

a. A chemist looking for adhesive residue on a surface.
b. A chemist running a PCR.
c. A chemist analyzing biological samples for drugs.
d. A sketch artist drawing a suspect based on the victim's description.

Answer 7

These are really chemistry questions, but I won't have a problem helping you I think. I have two years general chemistry, two semesters organic chemistry and biochemistry.

Answer 8

Okay, do you remember what I said PCR is?

Answer 9

yeah

Answer 10

So should we let it stay as possible answer or remove it? Oh, first, do you know what polymers are?

Answer 11

not im not sure which answer do you think it is?

Answer 12

I know what answer it is, but we are not suppose to give direct answers.

So, polymers are chemicals that are the same molecule repeated over and over again in chains. Like amylose, amylose is just glucose molecules attached to each other in a chain.

Technically, DNA is a polymer, but this is not traditionally in a paint and polymer place. I think we can safely remove D.

Now, what if I tell you that most paints and glues start off as singular molecules and as they dry the bind together in long chains.

Answer 13

would it be b then?

Answer 14

No, although DNA is a polymer, that would be in molecular lab. Read the last sentence of my last post.

Answer 15

oh its a

Answer 16

Yep.

Answer 17

thank you :)

Answer 18

NP