The Root-Mean-Square Speed (Thermal Speed)of a Certain Sample of Carbon

question 50

Multiple Choice

The root-mean-square speed (thermal speed) of a certain sample of carbon dioxide molecules,with a molecular weight of 44 g/mol,is 396 m/s.What is the root-mean-square speed (thermal speed) of water vapor molecules,with a molecular weight of 18 g/mol,at the same temperature?

• A) 253 m/s
• B) 396 m/s
• C) 421 m/s
• D) 506 m/s
• E) 619 m/s