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30 December, 19:41

What is the mass in grams of 0.375 mol if the element potassium, k?

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Answers (2)
  1. 30 December, 19:53
    0
    14.625g

    Explanation:

    Mass of a substance = number of moles of the substance * molar mass of the substance

    Substance of interest is potassium, K

    Given, Number of moles of K = 0.375mol

    Molar mass of K = 39g/mol

    Therefore, mass of K = 0.375*39=14.625g
  2. 30 December, 20:01
    0
    Answer: 14.625g

    Explanation:

    No of moles = mass given/molar mass

    No of moles given = 0.375mol

    Mass is the unknown (?)

    Molar mass of K = 39

    No of moles = mass given/molar mass

    Substitute the values

    0.375 = mass/39

    Cross multiply

    Mass = 39*0.375

    Mass = 14.625g

    The mass is 14.625g
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