Anyone who is a Chemist or really good in Chemistry?

Posted on 2015-09-07 06:43:00 in Chemistry by DAVID

So I'm in 10th grade, and my Chemistry teacher makes the whole class and subject a slow death. The whole way she teaches is vague and disorganized. I need some help in the following:

a. What does it mean that analytical chemistry refers to the separation, identification, and quantification of chemical compounds of natural and artificial materials? And that separation is extraction, precipitation, distillation, and chromatography? Any clarity to what that statement means?
b. What are metals and non metals, minerals and semiconductors? How to identify them?
c. What does it mean the "properties" of something?
d. How do you classify a property as intensive physical, extensive physical, or chemical?
e. Why does 15 dm^3 refer to volume, and 2.8g/cm^3 refer to density?
f. How do you classify an element as heterogeneous , homogenous, element, physical property, chemical property, compound, mixture, substance, and solution? Or as physical or chemical changes?
g. Why is only gas compressible, and liquids and solids are incompressible? And only liquids have medium forces of attraction?
h. What does it mean that 1m^3 equals 10^3L? And 1cm^3 equals 1mL???
i. What are the properties of calcium chloride, sodium bicarbonate, and phenol red?

I obviously need real help in this class. Even just some clarification in some things that could clear up a lot more other concepts would help. Anything helps!

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