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Find the point of intersection between two lines y=2x+4 and 2y+3x=1:

Initially drawing a diagram of the two lines helps to establish whether values should be positive or negative and gives a rough approximation of where the answer may be: By doing this we see the point of int...
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Answered by Michael W. Maths tutor
5998 Views

How do you calculate the pH of a weak acid?

Lets say we have 0.89 mol dm-3 of CH3COOH, a weak acid, with a ka of 1.7X10^-5.We want to find Ph, but to do this we first need to know [H+] because PH = -log10[H+].Because CH3COOH is a weak acid, it only pa...
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Answered by Amy H. Chemistry tutor
12737 Views

What's the difference between covalent and ionic bonding?

Covalent bonding happens when two molecules share a pair of electrons. For example in hydrogen chloride (HCl). Ionic bonding is when two oppositely charged ions are attracted to each other to form a lattice....
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Answered by Isobel S. Chemistry tutor
2782 Views

How can I evaluate something that I agree with?

Evaluation does not mean having to disprove or negate the point you have made. Some points do not have a logical opposite. However, you do not need to say whether or not the fiscal policy would increase cons...
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Answered by Hobz D. Economics tutor
3188 Views

How do I build literature critics in my exam answer?

The best way to think about literature critics is as an "expert opinion" that you can use to support your point or you can challenge to make a counter-point. In an exam, when you're feeling under t...
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