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Q.

The specific gravity of a HNO3 solution is 1.42 and it is 70% (w/w). The molar concentration of HNO3 is

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a

14.2

b

11.1

c

15.8

d

31.6

answer is A.

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Detailed Solution

D=MV ⇒ 1.42=100V ⇒ V=1001.42
Molarity of HNO3 =70×1.42×100063×100=15.8

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