Thank you for the opportunity to help you with your question!
Moles Nickel = atoms nickel over atoms per mole
moles nickel = 7.5 x l0^l5 over 6.02 x l0^23 = 1.25 x l0-8 moles, not very much
Now to get this number of moles into grams.
Grams Ni = #moles Ni times 58.7 grams per mole (from atomic wt. for Ni)
Grams Ni = l.25 x l0^-8 times 58.7 g/mole = 7.3 x l0-7 grams
C9H8O4 has a molar mass of 180 g/mol
convert 100.0 mg to grams and yu get 0.1 g
divide the 2 and you end up with mols = 1800 mols
multiply by avogradros number (6.022e23) and you end up with molecules.
1.08396e27 molecules of aspirin in the tablet
Please let me know if you need any clarification. I'm always happy to answer your questions.
15 Million Students Helped!
Sign up to view the full answer