Explanation Given The rate of effusion of arsenic (III) sulfide molecules is 0.28 times the rate of effusion of Ar atoms. The temperature of the gas is 320 ° C . The molar mass of Ar is 39.9 g/mol . The conversion of g into kg is done as, 1 g = 10 − 3 kg The conversion of 39.9 g/mol into kg/mol is, 39.9 g/mol = 39.9 × 10 − 3 kg/mol The conversion of temperature from ° C into Kelvin is done as, T ( K ) = T ( ° C ) + 273 Hence, the conversion of 320 ° C into Kelvin is, T ( K ) = ( 320 + 273 ) K = 593 K The root mean square speed of gas molecules is calculated by the formula, u rms = 3 R T M ……(1) Where, u rms is the root mean square speed of gas molecules. R is the gas constant ( 8.314 J/mol ⋅ K ) . T is the absolute temperature of the gas. M is the molar mass of gas. Substitute the values of T , R and M for argon atoms in above equation. u rms = 3 × 8.314 J/molK × 593 K 39.9 × 10 − 3 kg/mol = 608.8 m/s Since, the rate of effusion of arsenic sulfide is 0.28 times of argon atoms. Therefore, root mean square speed of arsenic sulfide is calculated as, ( u rms ) Arsenic ( III ) sulfide = 0

Laboratory Experiments for Chemistry: The Central Science (14th Edition)

14th Edition

ISBN: 9780134566207

Author: Theodore E. Brown, H. Eugene LeMay, Bruce E. Bursten, Catherine Murphy, Patrick Woodward, Matthew E. Stoltzfus, John H. Nelson, Kenneth C. Kemp

Publisher: PEARSON

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Chapter 10, Problem 87E

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To determine: The molecular formula of arsenic (III) sulfide in gaseous phase.

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Chapter 10, Problem 86E

Chapter 10, Problem 88E

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Laboratory Experiments for Chemistry: The Central Science (14th Edition)

Ch. 10.2 - Prob. 10.1.1PE Ch. 10.2 - Gallium melts just above room temperature...Ch. 10.2 - Prob. 10.2.1PE Ch. 10.2 - Prob. 10.2.2PE Ch. 10.3 - Prob. 10.3.1PE Ch. 10.3 - Prob. 10.3.2PE Ch. 10.4 - Prob. 10.4.1PE Ch. 10.4 - Prob. 10.4.2PE Ch. 10.4 - Prob. 10.5.1PE Ch. 10.4 - Prob. 10.5.2PE

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