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Which of the following contains greater number of oxygen atoms

(A) 1 gm of O (B) 1 gm of O2 (C) 1 gm of O3 (D) All have same number of atoms 

Asked by djshah.jain4 9th February 2018, 12:25 PM
Answered by Expert
Answer:
The correct answer is option D 
 
F o r space O comma left parenthesis space a t space w t space 16 space g m right parenthesis
o p t i o n space a colon
space 1 space m o l space equals space 16 space g m space
i n space 1 space g m space equals space ? space m o l e space
therefore space 1 space g space equals space 1 over 32 equals space 0.0625 space m o l e s
N o. space o f space a t o m s space equals space 0.0625 space cross times space left parenthesis 6.023 space cross times space 10 to the power of 23 right parenthesis space space equals space 3.76 space cross times space 10 to the power of 22 space space a t o m s space o f space O.

O p t i o n space B space colon space O subscript 2
1 m o l e space o f space O subscript 2 space equals space 16 space cross times 2 space equals 32 space g
1 space g space equals space 1 over 32 space space equals space 0.0313 space m o l e s space
therefore space N o. space o f space a t o m s space equals 0.0313 space cross times space left parenthesis 6.023 space cross times space 10 to the power of 23 right parenthesis space cross times space 2 space equals space 3.76 space cross times space 10 to the power of 22 space space a t o m s space o f space O.

O p t i o n space C colon O subscript 3
1 m o l e space o f space O subscript 3 space equals space 16 space cross times 3 equals 48 space g
1 space g space equals space 1 over 48 space space equals space 0.0208 space m o l e s space
therefore space N o. space o f space a t o m s space equals space 0.0208 space cross times space left parenthesis 6.023 space cross times space 10 to the power of 23 right parenthesis space cross times space 3 space equals space 3.76 space cross times space 10 to the power of 22 space space a t o m s space o f space O.

A l l space t h r e e space o p t i o n s space h a v e space s a m e space n o. space o f space O space a t o m s.
Answered by Expert 9th February 2018, 12:55 PM
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