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A Cold Trap Is Set Up to Cause Molecules to Linger

Question 39

Multiple Choice

A cold trap is set up to cause molecules to linger near the suction in a vacuum system.If the cold trap has an effective volume of 0.200 L and is maintained at A cold trap is set up to cause molecules to linger near the suction in a vacuum system.If the cold trap has an effective volume of 0.200 L and is maintained at   how many molecules are in it at 10.0 Pa of pressure? (Avogadro's number is 6.022 × 10<sup>23</sup> molecules/mol,and the universal gas constant is 8.314 J/mol ∙ K.Assume the behavior of an ideal gas.)  A) 1.11 × 10<sup>19</sup> molecules B) 1.10 × 10<sup>22</sup> molecules C) 7.71 × 10<sup>20</sup> molecules D) 7.71 × 10<sup>23</sup> molecules how many molecules are in it at 10.0 Pa of pressure? (Avogadro's number is 6.022 × 1023 molecules/mol,and the universal gas constant is 8.314 J/mol ∙ K.Assume the behavior of an ideal gas.)


A) 1.11 × 1019 molecules
B) 1.10 × 1022 molecules
C) 7.71 × 1020 molecules
D) 7.71 × 1023 molecules

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