anonymous
  • anonymous
how many atoms of C are there in 25 grams of C5H12 ? (pentane)
Chemistry
  • Stacey Warren - Expert brainly.com
Hey! We 've verified this expert answer for you, click below to unlock the details :)
SOLVED
At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.
katieb
  • katieb
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
anonymous
  • anonymous
LOOK AT the molecular formula of pentane .82 grams is molecular mass of pentane which is also molar mass of pentane now 1 mole of pentane contains 5*AVAGADROS NUMBER carbons atoms .now calculate the number of moles in 25 grams i hope u illl understand
Xishem
  • Xishem
In a more mathematical sense:\[25g(C_5H_{12})*\frac{1mol(C_5H_{12})}{72.15g(C_5H_{12})}=0.346500mol(C_5H_{12})\]\[0.346500mol(C_5H_{12})*\frac{6.022*10^{23}mlcl(C_5H_{12})}{1mol(C_5H_{12})}=2.086625*10^{23}mlcl(C_5H_{12}))\] Since each molecule of pentane contains 5 atoms of carbon:\[2.086625*10^{23}mlcl(pentane)*\frac{5atoms(C)}{1mlcl(pentane)}=1.0*10^{24}atoms(C)\]We're only justified in keeping 2sigfigs in the final answer.

Looking for something else?

Not the answer you are looking for? Search for more explanations.