You know one (1) mole of anything contains 6.02E23 atoms.Therefore, calculate moles of each of the substances listed. The larges mols OF ATOMS wins. moles = grams/atomic mass. For Pb that is
100 g/207.whatever = ?
Be careful with O2. That is a MOLECULE so after you find the moles of the MOLECULE O2 you must multiply by 2 to get the number of ATOMS.
Which of the following samples contains the greatest number of atoms.
1) 100g of Pb
2) 5g of He
3) 2.0 moles of Ar
4) 0.1 mole of Fe
5) 20 million O2 molecules
not sure how to go about this and would appreciate any insight
3 answers
good advice on the O2, but since a million is so much less than 6.02E23, you can ignore it from the get-go.
The others are in grams or moles, so they are at least in the same ball park.
The others are in grams or moles, so they are at least in the same ball park.
@oobleck-----but I always do things the hard way. Keeps me consistent.