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What mass of zinc can be obtained from the reaction of 16.3g of zinc oxide according to the following equation. ZnO (s) + C (s) -> Zn (s) + CO (g) I orginally got 16.3g as my answer... but now I think it is 65.39g ..

Q1 got me again! Dam.. haha. "Valency IS NOT the # of outer-shell electrons. Where'd you learn that? Oxygen has a valency of 6 then?" I always get tricked by that question :^( IDK ABOUT Q2...take strawberrye's advice and ask ur teachee. Btw, u could've asked that period when u received ur exam...

Technically, your answer for Q1 is correct.. For Q2, im confused... pretty interesting 0.0

Yeah, mathematics... gotta love that subject

@Shadowdude yes, im srs. @matchalolz hmm yes. Maybe. Some of what they say are right, but what annoys me the most is the fact that they think they are the smartest and whatever comes out of my mouth is worth no more than garbage. @Crobat yes, the predicting part is prolly true. But come on...

Why do parents think they know everything because of their age over their children? Why? Why? Why? Age = more life experience? I think that is a load of nonsense because once an individual gains the ability to think logically, in a self-conscious state, age no longer is a factor to the amount of...

Try your best to live up to your expectations :) be happy

It's still early ... focus more in class and maybe you will find something worth learning :D in my opinion, no subject is boring because ull always find something interesting within

Ask your teacher :) I had read some very detailed and sophisticated diary entries before yr 11 and they were more than 2 pages..

Yeah, after figuring out the answer, I realised my stupidity lol.. im dumb D;

Never mind, I understand now :D

Is this equation even right? Because it doesnt make any sense... 3 NaHSO3 + HAuCl4 +3H2O = 3 NaHSO4 + 8HCl + 2 Au

Thank you guys! Helped me a lot but I'll just ask my teacher today to see what exactly I need to include :)

I understand that I need to provide a judgement and give a reason to support my judgement. However, I dont know what im suppose to talk about.. (information) can you give me an example on what im suppose to write?

I dont understand what I am suppose to do here: "effectively justify appropriate criteria used to evaluate the alloys" or "provide a justification of the criteria used to evaluate the alloys." Help

I am using cambridge for now, but some of the questions are a little more than what I can handle for now.. I heard that the questions in fitzpatrick's 2u txtbook is a bit easier so I thought I might try it out

http://www.pearson.com.au/9781442564916 Do u guys think it will be good for me to purchase this book for 2u maths ? thank you in advance :)

Thank you all for your advices ^^

I think very differently when doing question in an exam and out of an exam... for chemistry, I wrote (aq) whenever the question mentioned the word 'solution'.... I lost 6 marks just by that.... so dumb of me ... I dont do that outside exam though... idk why I think so differently when I am doing...

Oh and physics half yearly is on next thursday. How do I study for physics? Advise on that too please