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9 December, 15:49

What is the number of moles in 4.00 g of magnesium oxide, MgO?

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Answers (2)
  1. 9 December, 16:03
    0
    Answer: 0.1 mole MgO

    Explanation: 1 mole of MgO is equal to its molar mass.

    4.00 MgO x 1 mole MgO / 40g MgO

    = 0.1 mole MgO
  2. 9 December, 16:31
    0
    Moles = mass/rfm

    MgO 16+24=40

    4/40

    moles = 0.1
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