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17 April, 03:42

A 25 mL sample of 0.100 M HNO3 completely reacts with NaOH according to this equation:

HNO3 (aq) + NaOH (aq) → NaNO3 (aq) + H2O (1)

How many moles of HNO3 are in the sample?

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  1. 17 April, 04:04
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    2.5x10^-3 mole.

    Explanation:

    Data obtained from the question include:

    Volume of solution = 25mL

    Molarity of HNO3 = 0.1M

    Mole of HNO3 = ... ?

    First, we'll begin by converting 25mL to L. This can be achieved by doing the following:

    1000mL = 1L

    Therefore, 25mL = 25/1000 = 0.025L

    Now, we can obtain the number of mole of HNO3 present in the solution as follow:

    Molarity = mole / Volume

    Mole = Molarity x Volume

    Mole = 0.1 x 0.025

    Mole = 2.5x10^-3 mole.

    Therefore, 2.5x10^-3 mole of HNO3 is present in the solution.
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