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From the following set of samples, select the one with the least number of atoms and the one with the greatest

number of total atoms A) 3 mol of CH4 B) 4 mol of H2O C) 2 mol of C3H8 D) 3 mol of P2O5 E) 2 mol of CH5N

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Solution@091212 Mole concept.docx

Solution
Let us first calculate number of atoms in each molecule.
CH4 --- 5 atoms
H2O --- 3 atoms
C3H8 -- 11 atoms
P2O5 -- 7 atoms
CH5N -- 7 atoms
1 mol = 6.023 x 10 23 atoms (Avogadro number)...

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