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## gary's Content

There have been 535 items by gary (Search limited from 29-November 21)

### #49712 Books For Sale

Posted by gary on 16 August 2005 - 02:23 PM in Chemistry

Leckie and Leckie Questions In Higher Chemistry

Leckie and Leckie Questions In Higher Chemistry

Chemcord Revision Notes For Higher Chemistry

Chemcord Revision Notes For Higher Chemistry

If you want to buy any of these just post here and I will arrange payment.

### #23379 2002 Paper 1 Q.8b

Posted by gary on 15 May 2005 - 12:28 PM in Problem Questions

I keep getting (5/6, - root 3)

Anyone know where I am going wrong?

### #24168 2oo2 Paper 2 - Question 6

Posted by gary on 17 May 2005 - 09:10 PM in Mathematics

Y= 2 sin (pie/3 - pie/6)

= 2 sin (pie/6)

= 2x0.5

= 1

point (pie/3,1)

Then

differentiate

2 cos(pie/3 - pie/6)

2 cos(pie/6)

2xroot 3/2

root 3

then using y-b=m(x-a)

y-1 = root 3(x-pie/3)

y-1 = root 3x - root3pie/3

### #18800 2003 Paper 2 question 6

Posted by gary on 11 April 2005 - 09:03 PM in Problem Questions

Thanks.

### #7916 Help With Questions

Posted by gary on 24 October 2004 - 09:54 AM in Chemistry

What is the mass of one aluminium atom?

What volume of Carbon dioxide is produced when 10cm3 of ethane is burnt in pure oxygen?

What volume of hydrogen is produced when 2g of magnesium reacts with excess hydrochloric acid according to the equation (assume the molar volume is 24 litres)

The combustion of ethan can be summarised by the equation

C2H6(g) = 3 1/2 02(g) gives 2CO2(g) + 3H20(g)

If air is 20%, by volume of oxygen how much air is needed to completely burn 10 litres of ethane?

### #6930 HELP! with this question

Posted by gary on 10 October 2004 - 12:34 PM in Mathematics

### #11530 Straight Line Geometry Problem

Posted by gary on 21 December 2004 - 07:18 PM in Mathematics

Find the equations of PS and QS

Hence find the oordinates of the fourth vertex S

Thanks for any help.

### #21068 2004 Paper 2 Question 10a

Posted by gary on 02 May 2005 - 05:59 PM in Problem Questions

The way to get this I think is 600/e^2 as I can't think of any other way but I keep getting the wrong answer on my calculator any ideas to what I am doing wrong?

### #6922 HELP! with this question

Posted by gary on 10 October 2004 - 10:34 AM in Mathematics

**If x centimetres is the length of the flag, show that the area of the flag, A square centimetres, is given by A(x) = 2x (120-x).**Also can anyone help with this fraction it has puzzled me because my final answer has came out weird:

9/1 x 1/81 - 2/1 x 1/9

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