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True - but take care. It's NOT the sum of the numbers. We have two possible set of numbers 1 1 1 2 2 OR 1 1 2 2 2 ......^ NOTE - the third column. Here we see that '1' is less than '2' so the numbering is ROW one so we have (in alpha order) 2,2-dichloro-1,1,1-trifluroethane

Sorry to say this, but you might be mistaken. A co-ordinate covalent bond is a shared pair of electrons (like a normal covalent bond) ... BUT ... both electrons come from only one of the 'atoms' being joined. In a 'normal' covalent bond, each 'atom' supplies one electron each to the "shaired...

There are many ways to make esters - Refluxing is only one of the METHODS - and this method is stipulated by the syllabus.

Re: Need help to write out experiment with chyclohexene and cylcohexane and bromine w This is an example of dynamic equilibrium. As Br2 is only slightly soluble in water most of it stays as Br2 - ie the position of equilibrium lies to the left. However some of the HOBr reacts with the...

A buffer is something that keeps the concentration of (say) H+ ions constant. For example if the [H+] gets too high the pH drops and the blood gets too acidic. A buffer stops this from happening. :)

Amphoteric (is NOT in the syllabus) - it means that that substance REACTS with both acids and bases. (Remember that just by reacting with an acid does NOT mean it is a base eg magnesium ribbbon) The 'typical' amphoteric substance, usually given, is aluminium hydroxide, Al(OH)3 Amphiprotic -...

The actual experiment can be viewed at ... http://www.chem.uiuc.edu/clcwebsite/cyclo.html :)

Bullet points are fine, howerer ... ... the "key words" [eg identify, explain, etc) need to be known & used. btw diagrams are a great way to HELP 'describe' ..... (remember, a picture is worth a 1,000 words. lol)

[my emphasis] Dont forget to learn the meaning of the "key words" - They can be found on the BOD site.

It was never 'one gene one chromosome'. On one chromosome there are many genes which code for 'proteins' or polypeptides - (review protein synthesis).

The syllabus has been on the BOS website for ALL to read. You can blame the teacher :mad1: , but you can also blame yourself for not being informed. :bomb: