How to find formula by valency and cross multiplication of carbon dioxide(CO2
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to find formula by valency we should use crossmultiplication method in which the valency of the respective two elements is crossmultiplied to get the formula of the respective compound. for example in the case of co2 the valency of carbon is two whereas the valency of oxygen is 2 hence by crossmultiplication method we get c4 cross multiplied by o2 which gives c2o4or co2
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