How many grams of NaOH are produced from 2.1g of Na2O? Na2O + H20 –> 2NaOH

Question

How many grams of NaOH are produced from 2.1g of Na2O?
Na2O + H20 –> 2NaOH

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Kiệt Gia 3 years 2021-09-05T14:09:41+00:00 1 Answers 10 views 0

Answers ( )

  1. Sapo1
    0
    2021-09-05T14:11:37+00:00
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    Answer:

    2.72g

    Explanation:

    The balanced equation of this reaction is given as follows:

    Na2O + H20 –> 2NaOH

    Based on this balanced equation, 1 mole of Na2O will produce 2 moles of NaOH.

    First, we need to convert mass of Na2O into moles by using the formula;

    mole = mass/molar mass

    Molar mass of Na2O = 23(2) + 16

    = 46 + 16

    = 62g/mol

    mole = 2.1g/62g/mol

    mole of Na2O = 0.034mol

    Hence, if 1 mole of Na2O will produce 2 moles of NaOH.

    Then, 0.034mol of Na2O will produce (0.034 × 2) = 0.068mol of NaOH.

    To convert mole of NaOH to mass, we use;

    mole = mass/molar mass

    Molar mass of NaOH = 23 + 16 + 1 = 40g/mol

    0.068 = mass/40

    mass of NaOH produced = 2.72g.

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )