Which elements have different balancy?
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Answer:
Some of the common elements that has a variable valency are iron(2 and 3),silver(1 and 2), gold(1 and 3), platinum(2 and 4), copper (1 and 2), lead(2 and 4), tin(2 and 4), mercury(1 and 2), tin(2 and 4) and so on.
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Explanation:
Many combustion reactions are hard to balance because of the oxygen in both the CO2 and H2O. Often a mixed fraction of ½ for the O2 will balance the equation. Only thing is you can't have a fraction for a coefficient. Therefore, you double ALL the coefficients when this happens.
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