# chemistry

2NO + O2 -> 2NO2

200. mL of NO at STP is reacted with 500. mL O2of at STP. Calculate the partial pressure of NO2 after the reaction goes to completion. Assume a constant volume.

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asked by yen
1. Constant volume? Exactly what is the volume...200ml, 500ml, or 700ml. It would be interesting to see how this reaction was accomplished. What was the temperature of the vessel when completed?

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2. Of NO2? it's not given.
That's all they gave me..

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