KVPY SA Exam 2015 Question Paper

Question : 39 of 80

Marks: +1, -0

If Avogadro’s number is

A _0

, the number of sulphur atoms present in 200 mL of 1N

H_2SO_4

Solution:

M_{ H_2SO_4}= 0.5

V_{ H_2SO_4}= 0.2

n_{ H_2SO_4}= 0.1

no of mole of ‘S’ atom = 0.1
∴ no of ‘s’ atom

= 0.1\ A_0

=A_0/10

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