a sample of sulfolane, C4H8O2S, contains 5.00*10^24 atoms. How many moles of sulfolane are there in the sample?

Question

nincompoop · Answer

use conversion factor from atoms to moles. 
you know the definition of a mole right?

anonymous · Answer

i did thaaaattt and i got 8.3 moles but it was wrong

nincompoop · Answer

show your solution

nincompoop · Answer

see there are different elements or kinds of atoms in the sample

anonymous · Answer

the answer is 0.554 but idk how to get that...

nincompoop · Answer

see there are different elements or kinds of atoms in the sample

nincompoop · Answer

don't you need to find the mass of the sample first?

anonymous · Answer

hmmm maybe.. ill try that! thanks!

nincompoop · Answer

what are you going to do with the mass after?

anonymous · Answer

hm no idea.... lol

jfraser · Answer

if there are $5 * 10^{24}$ TOTAL atoms in the sample, you need to know how many MOLECULES there are, before you can do anything else. Each molecule is made of 15 atoms total, so there are $$5*10^{24} atoms * (\frac{1 molecule}{15 atoms}) = 3.3*10^{23} molecules$$ $3.3*10^{23}$ moleculesin the sample. NOW you can use the identity of a mole to find how many moles are in the sample.

anonymous · Answer

Yups. Jfraser is right :) so there are 3.3x10*23 molecules of sulfolane. Now, divide this number by the avogadro's constant (approx 6x10*23) and you'll get 0.556mol of sulfolane molecules.