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A carbonic acid/hydrogen carbonate buffer is important in controlling the pH of blood. The normal pH of blood is 7.4. Calculate the ratio of carbonic acid to hydrogen carbonate at this pH give that the pKa for the first dissociation of carbonic acid is 6.35. With my working out I get 1:11...

When I click on the "posts" tab on the side of the home screen, I receive this error. This occurs randomly on some days. 80% of the time it is fine, but it's really annoying when I can't reply to threads I've commented in previously... Solution? I've tried the latest versions of Safari and...

"One of the methods of separating Uranium-235 (a nuclear feul) from uranium-238 (non fuel) is by the effusion of their gaseous hexafluorides, (235UF6 and 238UF6).How much faster will 235UF6 effuse than 238UF6? Use the following atomic masses (in amu): 235U: 235.119, 238U: 238.125, F:18.99840"...

I see the $136.50 Semester fee on "My UNSW". How do I move this fee to my HECS, please? Thank you!

So, I have this really amazing (if I do say so myself) 4-subject lecture book that I plan to take notes in during lectures for each subject (surprise). However, I'm just wondering if I need more than 1 book per semester. Should I get another 4-subject book for each of my tuts/labs? Another...

Anybody going to the SMSSOC 2013 Annual Camp? :)

I went and fetched my Student ID today and also handed in the Concession Fee Application form thingy. During high school I received a Student Concession Card (http://www.131500.com.au/tickets/upload/images/senior_secondary_student_vert.png/image), but they didn't give me one this time. So, is...

Macquarie - E business or UTS Buisness management and tourism. His originally aspirations were for just Business or, ultimately, Nutrition. My knowledge of Business is pretty minimal and I said I would ask you experts which he should pick. He's pretty much on the fence right now. Thoughts?

On a typical uni day, what do you bring with you? Laptop? Lunch? Pokemon cards? Satchel?

I'm enrolled to study Med Sci this year at UNSW in hope to transfer into medicine next year... (aren't we all?) My classes so far are: BABS1201 CHEM1011 SCIF1111 But I still have to do one more...recommended is a maths courses (stats), psychology or physics... What are the other electives...

General Maths- 21/61 Standard English- 14/82 Ancient- 7/20 Business studies- 17/55 Economics- 19/25 Schol rank: 180 Thank you :)

The dream: Study Medicine/Surgery at USYD However, I am well aware of the slim chances of such. So, I question you, what's the best way to achieve the dream? Do you recommend taking MedSci and transferring into medicine that year (what are the chances of this?)? If I pick MedSci, should I...

I understand how each works etc.etc. But why are both needed? If they both effectively kill pathogens, what's the point? This dotpoint(s) is/are driving me insane. =_=" thank you.

Good luck to everyone doing umat today :) I hope you all get the results you deserve! Most importantly, however - stay calm :) I'll be at the 1:30 sess at Olympic park today. I'll be wearing a plain bright yellow shirt and a black jacket. I'll also be the tallest, whitest and most awkward...

Can someone please give me pointers on how to handle these types of Questions? I really get so lost. When I read the solutions, they always seem to provide a huge, complicated table in which to derive the solution from - how on Earth am I meant to do this mentally under time restraints? Thank...

Can someone please help me with these two questions. I tried proving these the as per normal way, but the added variable at the front is putting me off. So, how do you do these questions, please: 1. In actual population studies the rate of growth is given by dP/dt = kP(1-RP) where k and R are...

CCl3CBrF2 1-bromo-2,2,2-trichloro-1,1-difluoroethane or 2-bromo-1,1,1-trichloro-2,2-difluoroethane thank you :)

Can someone please explain to me how to answer the following questions please :) Sketch the graphs of the following functions: i. y = cos^-1(cosx) ii.y = cos(cos^-1x) iii.y= tan^-1(tanx) How do you determine the domain and range of these functions, as well as there shape? thank you. :)

Hi, Can someone show me a quick and easy (?) way of integrating y = 2^x, by noticing that d(2^x)/dx = ln2.2^x Ty :)

How do you write the hydrolysis equation for Zinc Sulfate (a slightly acidic Salt)? Thank you. :)