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9 January, 22:55

Which gas sample at STP has the same total number of molecules as 2.0 liters of CO2 (g) at STP?

(1) 5.0 L of CO2 (g) (3) 3.0 L of H2S (g)

(2) 2.0 L of Cl2 (g) (4) 6.0 L of He (g)

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Answers (2)
  1. 10 January, 00:20
    0
    The sample at STP that has the same total number of molecules as 2.0 liters of CO2 (g) at STP is 2) 2.0 L of CI2 (g)
  2. 10 January, 01:19
    0
    Avogadro's law states that the volume of a gas is proportional to the number of moles. Also, the number of moles is proportional to the number of molecules (based on Avogadro's constant). Therefore, if 2 gas samples have the same volume, the have the same number of molecules, and the only choice with the same volume of 2.0 L is choice (2).
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