One mole of any substance contains 6.022 x 1023 atoms/molecules. Number of molecules of H2S04 present in 100 mL of 0.02 M H2S04 solution is ----------------

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asked Mar 5, 2018 in Class XI Chemistry by rahul152 (-2,844 points)

One mole of any substance contains 6.022 x 1023 atoms/molecules. Number of molecules of H2S04 present in 100 mL of 0.02 M H2S04 solution is ---------------- 
(a)12.044 x 1020 molecules 
(b) 6.022 x 1023 molecules
(c) 1 x 1023 molecules         
(d) 12.044 x 1023 molecules 
 

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1 Answer

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answered Mar 5, 2018 by nikita74 (-1,022 points)

(a) We know that M = n/V or n = M × V ( in L)
n = 0.02 × 0.1 = 0.002
No.of molecules = n × 6.022 × 1023
= 0.002 × 6.022 × 1023 = 12.044 × 1020 molecules 

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