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During the reaction of copper metal with concentrated hno3 one of the products of the reaction is a dense, toxic and red-brown gas. what is the formula of this gas?
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During the reaction of copper metal with concentrated hno3 one of the products of the reaction is a dense, toxic and red-brown gas. what is the formula of this gas?

User Ymln
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The reaction between HNO₃ and Cu is characterised by the reaction:
Cu + 4HNO₃ → Cu(NO₃)₂ + 2NO₂ + 2H₂O

Now, the formula of the thick gas produced that is toxic, and red-brown is actually Nitrogen Dioxide (NO₂).

User Himadri
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