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27 September, 08:19

Calcula la cantidad de gramos que hay en 12,5 mol de NaCl (Masa Na: 23,0; Cl: 35,5).

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  1. 27 September, 08:31
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    731.25 g

    Explanation:

    The question asks us to calculate the mass of 12.5 moles of NaCl. The individual relative atomic masses of the elements were supplied. We must first obtain the molar mass of sodium chloride as follows;

    Molar mass of sodium chloride = 23.0 + 35.5 = 58.5 gmol-1

    From the formula;

    Number of moles (n) = mass / molar mass

    Number of moles of sodium chloride = 12.5 moles

    Mass of sodium = The unknown

    Molar mass of sodium chloride = 58.5gmol-1

    Mass of sodium chloride = number of moles * molar mass

    Mass of sodium chloride = 12.5 * 58.5

    Mass of sodium chloride = 731.25 g
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