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23 June, 15:48

Calculate the percent composition of the following:

A. VO3

B. V2O5

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  1. 23 June, 15:57
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    A) Answer is: 51.48% V and 48.52% O.

    Ar (V) = 50.94; atomic weight of vanadium.

    Ar (O) = 16; atomic weight of oxygen.

    Ar (VO₃) = 50.94 + 3 · 16.

    Ar (VO₃) = 98.94; molecular weight of vanadium (VI) oxide.

    ω (V) = Ar (V) : Ar (VO₃) · 100%.

    ω (V) = 51.48%; the percent composition of vanadium.

    ω (O) = 100% - 51.48%.

    ω (O) = 48.52%; the percent composition of oxygen.

    B) Answer is: 67.80% V and 32.20% O.

    Ar (V) = 50.94; atomic weight of vanadium.

    Ar (O) = 16; atomic weight of oxygen.

    Ar (V₂O₅) = 2 · 50.94 + 5 · 16.

    Ar (V₂O₅) = 149.88; molecular weight of vanadium (V) oxide.

    ω (V) = 2 · Ar (V) : Ar (V₂O₅) · 100%.

    ω (V) = 67.80%; the percent composition of vanadium.

    ω (O) = 100% - 67.80%.

    ω (O) = 32.20%; the percent composition of oxygen.
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