問題詳情

21. As shown in Fig, 1, a container with africtionless movable partitionsfixed volume at constant temperature isdivided into three compartments (A, B, Hzand C) by two partitions, which aremovable without friction. CompartmentsA and C are filled with an equal amount of mass of gas X and Y. When two partitions stop sliding, the density of X is equal tothat of Y. Which of the following statements is correct?
  


(A) Volume of gas: V(X) ＞ V(H2) ＞ V(Y)
(B) Number of moles of gas: n(X) ＜n(H2) ＜n(Y)
(C) Number of moles of gas: n(X) = n(H2) = n(Y)
(D) The molecular mass of X is equal to the molecular mass of Y.
(E) The molecular mass of X is smaller than the molecular mass of Y.

參考答案

答案：D
難度：計算中-1
書單：沒有書單，新增