Top answers

How should I structure my essay?

You should start thinking about essay structure when planning your answer. Break the essay down into intro, 3 or 4 paragraphs and a conclusion. The purpose of the into is to 'unpick' the question - discuss k...
HD
Answered by Harjas D. • History tutor
2631 Views

Calculate Gibbs free energy when S = 131 J mol-1 and H = 155 kJ mol-1 at 25 C, stating whether or not the reaction is feasable.

First, make sure everything is in the correct units: H = 155 kJ mol-1 = 155000 J mol-1 S = 131 J mol-1 T = 25 C = 298K Then use the Gibbs equation to calculate the free energy: G = H - TS G = 155000-298*131 ...
IH
Answered by Isaac H. • Chemistry tutor
2629 Views

How do I rearrange this equation for x? y=(x+2)/(3x-1) +2

First of all we must consider the fraction. To eliminate this we multiply both sides through by 3x-1. We then end up with y(3x-1)=(x+2)+2(3x-1). The next step is to expand out the brackets and collate terms,...
CM
Answered by Charlie M. • Maths tutor
4831 Views

Show (4+5/7) - (2+1/3) as a single mixed fraction.

Mixed number -> top heavy fraction: 4 + 5/7 = ((4 7)+5)/7 = (28+5)/7 = 33/7 2+ 1/3 = ((2 3)+1)/3 = (6+1)/3 = 7/3 Common denominator by multiplying by each others: 33/7 = (33 3)/(7 3) = 99/21 7/3 = (7 7)/(...
ER
Answered by Ethan R. • Maths tutor
4040 Views

Do I need to evaluate the context of a source?

When answering a question that involves a source and asks how far it goes in supporting one historical viewpoint, the easiest thing to do is use the 'COP' system. First look at the context, what was happenin...
AR
Answered by Alicia R. • History tutor
7837 Views