plzzz help me answer this chem questions...?

Question

I have a quiz tomorrow on chem and this will serve as my reviewer help plzz..thnx


1. Temperature at which the
solid and liquid phases of a
substance can exist together.
2. Temperature at which the
vapor pressure of a liquid is
equal to atmospheric pressure
3. Substance that can transmit
electricity
4. One form of describing the
concentration of a solution
5. Describes any system in
which two changes that
oppose each other are
occurring at the same rate.
A. Boiling point
B. Conductor
C. Equilbrium
D. Freezing point
E. Molality

(16.1) 1210. A solution of sodium chloride is a
A. heterogeneous compound C. heterogeneous mixture
B. homogeneous compound D. homogeneous mixture
(16.1) 1211. Which applies to the dissolved particles in a solution|?
A. They can be seen with a hand lens.
B. They are large enough to scatter light
C. They will settle out of solution when left standing.
D. They will settle out of solution when left standing.
E. They are in the same phase as the solvent.
......

Answer 1

ps F*** the first three people they are being A**holes

1) Solid and liquid together - that's the melting point
2) Vapor pressure - atmospheric pressure --> boiling point

3) Substance to conduct electricity - How about Copper
4) g/ml or mole/liter
5) two charges occuring at the same rate = equilibrium

A+ = B +

16.1)1210 A solution of NaCl is a homogeneous mixture (D)
16.1)1211 dissloved particle are in the same phase as the solvent (E)

Answer 2

This is about as basic as you can get. I agree with the other guy that some simple reading will help to understand this.

Two phases coexist at the temperature which describes the phase change. For solid and liquid, it is the melting point, for liquid and gas, it is the boiling point. A liquid's vapor pressure increases with temperature and spontaneous vaporization occurs when the vapor pressure equals atmospheric pressure. This is usually called the boiling point. I'll leave #3 for you to peruse some basic definitions. #4 will depend on what you have learned at this point, because there are many different ways to express the concentration of a solution, including Molarity, molality, % by mass, ppm, ppb, % by volume, Mole Fraction, etc. In #5, two changes that are equal (same rate) and opposite will cancel out. We say that it is in equilibrium. #1210 is so easy that I will not stoop to answering it here. In #1211, C and D are the same answer. I'm guessing that one of these says "will not settle out". That is the answer that you are looking for.

Answer 3

This will sound rude to you, but you shouldn't take it to be. All of these questions would easily be answered by YOU if you just get your book out, open it and spend some time reading it. If you've been to class and have read your book, you really shouldn't have any problem determining the answers to all of these questions. Only by your making the effort to study and to learn the material will you be able to do well on the test.

Answer 4

Agreed, in the time it took you to type this out and post it, you could have easily looked the answers up in your book, An added benefit? You might find something else out that you didn't know to ask about.