Mole ConceptHard
Question
Two bulbs A and B contains 16 g O2 and 16g O3, respectively. Which of the statements are true ?
Options
A.Both bulbs contain same number of atoms.
B.Both bulbs contain different number of atoms.
C.Both bulbs contain same number of molecules.
D.Bulb A contains NA/2 molecules while bulb B contains NA/3 molecules. (NA = Avogadro′s number).
Solution
Number of O2 atoms = 
× 2 × NA = 1 × NAa. Number of O2 atoms = × 2 × NA = 1 × NA
b. Number of O3 atoms =
× 3 × NA = 1 × NA
c. i. Number of O2 molecules =
× NA = 
NA
ii. Number of O2 molecules =
× NA = 
NA
d. is correct
× 2 × NA = 1 × NAa. Number of O2 atoms = × 2 × NA = 1 × NAb. Number of O3 atoms =
× 3 × NA = 1 × NAc. i. Number of O2 molecules =
× NA = NAii. Number of O2 molecules =
× NA = NAd. is correct
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