When gases C and D were passed through a hot tube of powdered copper, gas C reacted to form CuO. The remaining gas, D, was collected in a third 821 ml flask and found to have mass of 1.68 g and a pres

Question

When gases C and D were passed through a hot tube of powdered copper, gas C reacted to form CuO. The remaining gas, D, was collected in a third 821 ml flask and found to have mass of 1.68 g and a pressure of 1.8 atm at 27°C. How many moles each of C and D were present and what are their likely identities?

Prashant Kotian · Accepted Answer

Correct answer: A. C reacts with Cu to form CuO, so C is O₂. D remaining at 300 K: . Molar mass of D = (N₂). Moles of C = . Therefore, correct answer is A.

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