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Compare the root-mean-square speeds of $\mathrm{O}_{2}$ and $\mathrm{UF}_{6}$ at $65^{\circ} \mathrm{C}$.

The root-mean-square speed of $\mathrm{O}_{2}$ is 3.32 times faster than that of $\mathrm{UF}_{6}$

Chemistry 101

Chapter 5

Gases

University of Central Florida

Drexel University

University of Maryland - University College

University of Toronto

Lectures

05:03

In physics, a gas is one of the three major states of matter (the others being liquid and solid). A gas is a fluid that does not support tensile stress, meaning that it is compressible. The word gas is a neologism first used by the early 17th-century Flemish chemist J.B. van Helmont, based on the Greek word ("chaos"), the simplest of all the elemental forms of matter.

04:46

In physics, thermodynamics is the science of energy and its transformations. The three laws of thermodynamics state that energy can be exchanged between physical systems as heat and work; that the total energy of a system can be calculated by adding up all forms of energy in the system; that energy spontaneously flows from being localized to becoming dispersed, spread out, or uniform; and that the entropy of an isolated system not in equilibrium will tend to increase over time, approaching a maximum value at equilibrium.

02:36

Calculate the root-mean-sq…

01:23

02:03

The root-mean-square speed…

02:47

Determine the root-mean-sq…

This is question 82 from chapter 11 and we're comparing best every square mean, uh, oxygen and uranium fluoride. Okay, so the equation you're going to use this awful we screaming is a square root three time Is the gas constant? Have temperature over the molar mass. Okay, Before we get that, we're gonna have to convert. The soc is temperature to Calvin, so they give us 65 degrees. So she is making the coven. We had to add 273. And when you do this, it should come out to be 330 eight. Okay, Okay. We can now solve four our compounds, So first you have oxygen. Okay, so you have a square roots is gonna be three times the gas. Constant was a right 3145 times a temperature, which we say was 300 and 38 k And this is all over the molar mass. So the more massive to oxygen's is 32 grams. But we have to convert the kilograms and order soft for this. That I was gonna be point zero 32 And this is going to come out to be 500 and 13 0.3. Okay, Next we will dio Iranian fluoride. Okay, so take the square root of this. It's gonna be three times a 0.3 145 times 300 38 k over the molar mass of this compound, which could be 352. But putting it and kilogram of 1.3, but to eso and this is gonna come out to be 100 and 50 former 0.8, Yes.

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