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5 October, 10:51

Which of the following correctly illustrates the mass of reactants and products for the reaction below?

4Na + O2 - -> 2Na2O

92 g Na, 32 g O2, 108 g Na2O

23 g Na, 16 g O2, 124 g Na2O

92 g Na, 16 g O2, 124 g Na2O

23.0 g Na, 16 g O2, 39 g Na2O

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  1. 5 October, 14:31
    0
    The mass of reactants and products for the reaction is this:

    - 92 g Na, 32 g O₂, 124 g Na₂O

    which is not a choice from the list.

    Explanation:

    4 moles of Na reacts with 1 mol of oxygen to produce 2 moles of sodium oxide.

    Na = 23 g/m

    4 moles are (4. 23) = 92 g

    O₂ = 32 g/m

    It's a diatomic molecule (each O is 16 g/m)

    Na₂O = 62 g/m

    2 mol of sodium oxide will be (2.62) = 124 grams

    The mass of reactants and products for the reaction is this:

    - 92 g Na, 32 g O₂, 124 g Na₂O

    which is not a choice from the list.
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