20. What is the mole fraction of oxygen in a gas mixture that is 27% oxygen and 73% nitrogen by volume? (A) 0.24 (B)0.27 (C) 0.32 (D)0.37

20. What is the mole fraction of oxygen in a gas mixture that is 27% oxygen and 73% nitrogen by volume?
(A) 0.24
(B)0.27
(C) 0.32
(D)0.37

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統計： A(3), B(7), C(0), D(0), E(0) #2740031

詳解 (共 2 筆)

JIA L

B1 · 2022/02/03

#5328162

PV=nRT體積比跟莫爾數比成正比所以答...

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MoAI - 您的AI助手

B2 · 2025/12/11

#7228336

這是一道關於氣體性質與化學計量的重要題目...

(共 1784 字，隱藏中）

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5. Consider the following gas samples:Which one of the following statements is false? (A) The volume of sample A is twice the volume of sample B. (B) The average kinetic energy of the molecules in sample A is twice the average kinetic energy of the molecules in sample B. (C) The fraction of molecules in sample A having a kinetic energy greater than some high fixed value is larger than the fraction of molecules in sample B having kinetic energies greater than that same high fixed value. (D) The mean square velocity of molecules in sample A is twice as large as the mean square velocity of molecules in sample B. (E) Assumning identical intermolecular forces in the two samples, sample A should be more nearly ideal than sample B.

20. What is the mole fraction of oxygen in a gas mixture that is 27% oxygen and 73% nitrogen by volume?
(A) 0.24
(B)0.27
(C) 0.32
(D)0.37

詳解 (共 2 筆)

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