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Thanks for the advice! :D but for such a simple question worth 6 marks, as if you're not expected to mention what cfc's are? How is a marker supposed to know what they are or why they were used without you explaining? Could you explain the "not simply that free radicals directly cause ozone...

Do this pedigree question and tell me what you get! http://community.boredofstudies.org/attachment.php?attachmentid=30959&d=1411817956 also, have not revised last two dot points of industrial yet (solvay or saponification) someone else answer the question

Pedigree. Someone do this, need confirmation.

Industrial

Yes. HSC exam covers both preliminary and HSC work.

Energy released when a compound undergoes combustion (burns) Properrrrr pls

nao keep this chemistry, no bio in here

The joys of doing a bio paper and answering the chem questions you guys put up :D more pls

Bio & Chem = Understand and Rote learn.

Very ugly question. Through collaboration, chemists can assist in reversing or minimising environmental problems caused by technology and the human demand for products and services. Collaboration in general, provides the expertise of different branches of Chemistry and results in either better...

More questions now :D

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Okay provide marks if asking a question e.g. blah blah blah blah? - 4 marks

hahaha if it's 6 marks you have to explain everything. Tbh i don't think a mark is awarded to defining what ozone depletion is, the answer is within the two words. you're not going to so ozone depletion is the deterioration of ozone concentration because the "depletion" tells you that it is...

Ozone depletion occurs because of chlorofluorocarbons. Chlorofluorocarbons are alkane molecules with the hydrogens replaced with chlorine or fluorine molecules. In the troposphere these chemicals are extremely stable, chemically inert and unreactive. They are non-corrosive chemicals which were...

Hence why you picked seventhroot

Why did you stop giving questions?

A Give wordy questions!

nah, just telling you to use your own advice.

Spot on! That's exactly what i do, hence no need for revision. haha good explanation, i use analogies such as pretending the salt is the child and what are the parents blah blah hahahaha