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Nitrate salts (NO3-), when heated, can produce nitrites (NO2-) plus oxygen (O2). A sample of potassium nitrate is heated, and the O2 gas produced is collected in a 740 mL flask. The pressure of the gas in the flask is 2.9 atm, and the temperature is recorded to be 317 K. The value of R= 0.0821 atm L/(mol K) How many moles of O2 gas were produced? moles After a few hours, the 740 mL flask cools to a temperature of 293K. What is the new pressure due to the O2 gas?

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Nitrate salts (NO3–), when heated, can produce nitrites (NO2–) plus

oxygen (O2). A sample of potassium nitrate is heated, and the O2 gas produced is collected in a 740 mL flask. The pressure of the gas in the flask is 2.9 atm, and the temperature is recorded to be 317 K. The value of R= 0.0821 atm L/(mol K)

How many moles of O2 gas were produced?   moles

After a few hours, the 740 mL flask cools to a temperature of 293K. What is the new pressure due to the O2 gas?

 
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