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Re: Why is HCl added to the fertiliser when finding the % of sulphate in lawn fertili One more thing, how would I write an equation for the addition of HCl to the fertiliser (we don't know what's in the fertiliser other than sulphate). Could I say, SO4 2-(s) + 2HCl(aq) = H2SO4(aq) + 2Cl(aq)...

Re: Why is HCl added to the fertiliser when finding the % of sulphate in lawn fertili Absolute legend!

In terms of the chemistry involved?

I was in a similar position a for weeks back. Pick the one you enjoy most or will need later on in life. For me that was economics.

99

hey, what school do you go to

Business = 35-40 Eco = 15

Any others?

So I will be picking up EXT 2 maths for the HSC and need to drop a subject so that I don't have 14 Units. Ranks: Business Studies - #1 or #2 (haven't got yearlies back yet) Economics - #1 or #2 (haven't got yearlies back yet) I am aware that economics scales better. However, I feel like...

So, my school has got 1 band 6 in eco in the past 8 or so years. Avg 1-2 in business for the last 8 years though. This is a tough decision.

Ah ok. Found this site also https://www.hscninja.com/honour/roll/year/2016

Thanks for the response. Do teachers generally give out past years results? Or is there some sort of website that lists them.

So I will be picking up EXT 2 maths for the HSC and need to drop a subject so that I don't have 14 Units. Ranks: Business Studies - #1 or #2 (haven't got yearlies back yet) Economics - #1 or #2 (haven't got yearlies back yet) I am aware that economics scales better. However, I feel like my...

You're better off learning all of them otherwise you might get a curveball questiom involving an ion you don't know.

Put aligned marks into it

Do you think I should do 4U maths. My Ext 1 marks are as follows: Test 1: 93% Test 2 (Half yearly): 85% Test 3: 80% Test 4 (yearly): 93.5% Overall: 88% Rank #2 So what do you think, and what are some important things to consider in the decision. Thanks :tongue:

Thank you for your help.

yeah he did

Where did you get the 20 degree angle from? The 10 I understand.

I don't quite follow. What would be the equation?