Approximation Q

[BiomajorPreDent]

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Hey, when you guys do chem problems with gases and such like pv=nrt

how much do you approximate the units? Like do you always plug n chug exact units or do you round .0821 to .1 and stuff like that?

I cant remember how close together the answer choices are on the real exam, and I usually dont round and sometimes it takes too long, especially multplying or dividing .0821 and temperatures with 3 digits

I dont wanna round too much and screw up the problem though

(I am referring to the questions where you actually have to solve them obviously, not the ones where the answer choices are already just setup in the formula form)

 

[DrSpeed]

look at your answer choices and you can get a good estimation of how much rounding you can do.

 

[alanan84]

I think you're pretty safe rounding the gas constant to .1 when you need to.