Question

ans is option 1 i.e., 5
kindly solve it and upload it
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Answer 1

Answer: ( 1 )

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Answer 2

molarity of 40% solution = (% by mass ×density ×10 )/molar mass

=40×1.5×10=3

M₁V₁=M₂V₂

3×V=30×0.5

Volume required =5ml