WTF? Are they expecting me to know the molar mass of carbon dioxide off the top of my head?
the ideal gas law is PV = nRT, with n being the number of moles. How am I supposed to know what n is without memorising the molar mass of carbon dioxide?
>>7982949
carbon and oxygen masses are two of the easiest to remember and also two of the most commonly used
they're 12 and 16 and im not even a fucking chem student
>>/wsr/
>>7982955
I'm a physics student, so I didn't think I needed to know this shit.
What else do I need to memorise from the periodic table?
>>7982959
i dont know, im not in your physics class
>>7982959
If you're a science student, you really should print off a periodic table and put it in a place where you can refer to it easily. You don't need to memorize anything, but you should have something to look to for those answers.
>>7982965
The exam this is a practice paper for allows no calculators, notes or formula sheets though
>>7982967
so memorize the ones that are on the practice exam
fuck i hope you're not majoring in physics
>>7982969
But I can't be sure that there aren't other required pieces of chemistry knowledge that arent in the practice exams by chance.
There is no syllabus for this exam.
>>7982971
A lot of the most basic gases have pretty nice round number estimates for molar mass. For example:
Hydrogen - 1
Helium - 4
Carbon - 12
Nitrogen - 14
Oxygen - 16
Sulfur ~ 32
Potassium ~ 39
You shouldn't be expected to memorize the whole table; Most other elements' molar masses ought to be supplied in the exam question. That's usually how it is.
>>7982949
What are you retarded? The professor is going to give you a periodic table of will give you the mw.
>>7982987
No he won't.
>>7982982
Thanks. I'll stick this up on my noteboard and hope it sinks in over the next few weeks.
>>7982959
If you can't remember the masses of them, derive them from the dirac equation for massive atoms, then just examine their properties, for example carbon conductive when in graphite form. This is simple
It's roughly 44 grams, off the top of my head, and I'm not even taking chem.
Memorizing one decimal place is sufficient. You should definitely know the molar masses of Carbon, Oxygen, and Hydrogen.
I always got a fucking table with my exams though. I just memorized the molar masses of Carbon, Oxygen, Hydrogen, and Nitrogen to save a bit of time.
>>7983045
Its the 3rd most recent PAT practice paper online. I guess a lot of people are taking it now that the exams are nearing.
>>7982949
Kill yourself
