FreeMCATPrep Logo

Support us and cryptocurrency!
Try a browser that's faster, safer, ad-free, and earns you cryptocurrency for using it! W3Schools


More Than 475 Free MCAT Questions with Detailed Answers!

Click HERE for your Random Question from our MCAT Question A Day Archive


MCAT Question A Day - 10/30/14 - Answer!

A 13 gram gaseous sample of an unknown hydrocarbon occupies a volume of 11.2 L at STP. What is the hydrocarbon?

A.  CH
B.  C2H4
C.  C2H2
D.  C3H3

C is correct. You should recognize that 1 mole of gas occupies 22.4 liters at STP, so there is 0.5 moles of gas in the sample. 13 g / 0.5 mol ~ 26 g/mol

Want more questions? - Click here to check out our MCAT Question A Day archive