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20 December, 08:34

When potassium bromate (kbro3) is heated, it decomposes into potassium bromide and a gas that supports the combustion of a glowing splint?

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  1. 20 December, 08:36
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    We know that the oxygen (O2) causes a glowing splint to reignite, however, let us check what is missing on the products side of the chemical equation:

    KBrO3 → KBr + ?

    As we see, oxygen (O2) is the element missing from the other side. Therefore the balanced chemical equation for this decomposition is as follows:

    2KBrO3 → 2KBr + 3O2
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