Sunday, February 7, 2010

A sample of carbon dioxide occupies 22.4 liters at STP. Which of the following statements is true?

the sample contains 6.02 麓 1023 atoms


the sample contains 6.02 麓 1023 atoms of oxygen


the sample contains 6.02 麓 1023 molecules


none of the above is trueA sample of carbon dioxide occupies 22.4 liters at STP. Which of the following statements is true?
6.02x10^23 molecules of CO2 (ideal gas law; 1 mole occupies 22.4 L at STP)A sample of carbon dioxide occupies 22.4 liters at STP. Which of the following statements is true?
the sample contains 6.02E23 molecules. if the sample occupies 22.4 L at STP, you have one mole of material. in this case you're looking at a volume of carbon dioxide, not a volume of oxygen or hydrogen gas, so you have 6.02E23 molecules of carbon dioxide.

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