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Q.

25 ml   of 3.0 M HNO3  are mixed with 75 ml of 4.0 M HNO3. If the volumes are additive, the molarity  of the final solution would be ____?

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a

3.25 M

b

3.50 M

c

3.75 M

d

4.0 M

answer is C.

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Detailed Solution

The molarity of the resultant solution is follows

M=M1V1+M2V2V1+V2     =25×3+75×4100=75+300100=375100=3.75M

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