Homework Help: Chemistry

Posted by Hannah on Friday, January 13, 2012 at 10:44pm.

Which molecule has the greatest average velocity at 100 degrees celsius.

He, Cl2, Xe, O2, NO2

I used the root mean squared formula but I think I did it wrong. I got Xe as my answer. Is this correct?

Chemistry - DrBob222, Friday, January 13, 2012 at 11:00pm
From u = sqrt(3RT/M), the largest M will give you the smallest u. The smallest M will give you the largest u.
Chemistry - Hannah, Friday, January 13, 2012 at 11:12pm
What is RT?

So for He I would do square root 3 times (value of RT) / 1.0079 correct?
Chemistry - DrBob222, Friday, January 13, 2012 at 11:16pm
R is 8.314
T is temperature.
However, you are asked only for the greatest, not a value. You don't need R or T.
Chemistry - Hannah, Saturday, January 14, 2012 at 12:40am
so I just have to compare the molar mass of each gas and the smallest is the greatest?
Chemistry - DrBob222, Saturday, January 14, 2012 at 1:46am
Yes, if the root mean squared velocity is what you are looking for.

Answer this Question

Related Questions

Chemistry - Which molecule below has the greatest average velocity at 100 ...
Chemistry - Which molecule below has the greatest average velocity at 100 ...
science - which ranks the gases in order of increasing average velocity? H2&...
chemistry - Which of the following equations correctly describes the ...
Chemistry(Please respond, thank you!) - Using this data, 2 NO(g) + Cl2(g) == 2 ...
science - Which of the following equations correctly describes the relationship ...
Chemistry - He is the lightest noble gas component of air, and Xe is the ...
Chemistry - the reaction 2 NO + O2 <=> 2 NO2 (delta H = -114.2 kJ...
Chemistry(Please help, thank you!) - Using this data, 2 NO(g) + Cl2(g) == 2 NOCl...
Chemistry - "Energy is released when 100 kg of steam at 150 degrees Celsius...

For Further Reading

First Name:
School Subject:
Answer: