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Name the elements present in this gas and wire their valency. [Given, atomic masses of C = 12 u, O = 16 u, NA = 6.022 × 10^23 per mole]

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Name the elements present in this gas and wire their valency. 

[Given, atomic masses of C = 12 u, O = 16 u, NA = 6.022 × 1023 per mole]

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The elements present in carbon dioxide gas are carbon and oxygen. The valency of carbon is 1 and the valency of oxygen is 2-

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