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Molarity from mass percent and density

This type of question, asked 4 times: 26 Jun 2022, 29 Jan 2024, 31 Jan 2024, 28 Jan 2025. All 5 questions below, oldest first.

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  1. Question 1

    26 Jun 2022

    31
    A commercially sold conc. HClHCl is 35%HCl35\% HCl by mass. If the density of this commercial acid is 1.46 g/mLg/mL, the molarity of this solution is: (Atomic mass: Cl=35.5amu,H=1amuCl = 35.5amu,H = 1amu )

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  2. Question 2

    29 Jan 2024

    55
    A solution of H2SO4H_{2}SO_{4} is 31.4%H2SO431.4\%H_{2}SO_{4} by mass and has a density of 1.25 g/mL1.25\text{ }g/mL. The molarity of the H2SO4H_{2}SO_{4} solution is ___ MM (nearest integer) [Given molar mass of H2SO4=98 g mol−1H_{2}SO_{4}= 98\text{ }g{\text{ }mol}^{- 1} ]

  3. Question 3

    31 Jan 2024

    147
    The molarity of 1 L1\text{ }L orthophosphoric acid (H3PO4)\left( H_{3}PO_{4} \right) having 70%70\% purity by weight (specific gravity 1.54 g cm−31.54\text{ }g{\text{ }cm}^{- 3} ) is ____ M. (Molar mass of H3PO4=98 g mol−1H_{3}PO_{4}= 98\text{ }g{\text{ }mol}^{- 1} )

  4. Question 4

    28 Jan 2025

    48
    The molarity of a 70%70\% (mass // mass) aqueous solution of a monobasic acid (X) is ____\_\_\_\_ M(Nearest integer) [Given : Density of aqueous solution of (X)(X) is 1.25 g mL−11.25\text{ }g{\text{ }mL}^{- 1} Molar mass of the acid is 70 g mol−170\text{ }g{\text{ }mol}^{- 1} ]

  5. Question 5

    28 Jan 2025

    110
    Concentrated nitric acid is labelled as 75%75\% by mass. The volume in mL of the solution which contains 30 g of nitric acid is ___\_\_\_ Given : Density of nitric acid solution is 1.25 g/mL1.25\text{ }g/mL

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