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26 September, 13:02

3. How many moles are in 75g of Na20?

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Answers (2)
  1. 26 September, 14:22
    0
    Answer: 1.2 moles

    Explanation:

    Given that,

    Amount of moles of Na2O (n) = ?

    Mass of Na2O in grams = 75g

    For molar mass of Na2O, use the atomic masses:

    Sodium, Na = 23g;

    Oxygen, O = 16g

    Na2O = (23g x 2) + 16g

    = 46g + 16g

    = 62g/mol

    Since, amount of moles = mass in grams / molar mass

    n = 75g / 62g/mol

    n = 1.2 moles

    Thus, there are 1.2 moles are in 75g of Na20
  2. 26 September, 15:00
    0
    There are 1.2100884590798249 moles in 75g of Na20
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