When gases B, C and D were passed through a tube of powdered Li₂O, gas B reacted to form Li₂CO₃. The remaining gases, C and D, were collected in another 821 ml flask and found to have a pressure of 2.

Question

When gases B, C and D were passed through a tube of powdered Li₂O, gas B reacted to form Li₂CO₃. The remaining gases, C and D, were collected in another 821 ml flask and found to have a pressure of 2.1 atm at 27°C. How many moles of B were present and what is its likely identity?

Prashant Kotian · Accepted Answer

Correct answer: B. B forms carbonate, so it is CO₂. Remaining C+D at 300 K: . Moles of B = . Identity is CO₂. Therefore, correct answer is B.

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