Question

1. Ibuprofen, C13H18O2, is the active ingredient in many non-prescription pain relievers.
(a) If the tablets in a bottle contain a total of 13 g of ibuprofen, how many moles of ibuprofen are in the bottle?
Work

N= mass/mr
N=13/206.29g
N=0.0630n


Answer 0.0630n

(b) How many atoms of ibuprofen are in the bottle?

Answer 1

so you got the moles

to go from moles to molecules divide them moles by avogadros number

\(molecules=\dfrac{moles}{N_A}\)

Answer 2

if it wants ATOMS and not just molecules, then you multiply the number of molecules by the number of atoms 1 molecules of ibuprofen consists of.

Answer 3

so which ones am i divinging? all of the percentages by the moles and adding them?!

Answer 4

moles/avogadros number

Answer 5

i dont know what that means!

Answer 6

but are they asking for molecules of ibuprofen or total number of atoms?

Answer 7

total number of atoms in the entire bottle of ibuprofen

Answer 8

N= mass/mr
N=13/206.29g
N=0.0630n


Answer 0.0630n

this is moles

so moles/avogadros number = \(\dfrac{0.0630}{6.022*10^{22}}\)

Answer 9

i meant to the power of 23, as in "\(6.022*10^{23}\)"

Answer 10

thank you!