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?

620 m/s

Explanation:

The root-mean-square speed () of a gas can be calculated using the following expression.

where,

R: ideal gas constant

T: absolute temperature

M: molar mass

We can use the data of carbon dioxide to find the temperature.

Now that we know the temperature, we can calculate the root-mean-square speed of water vapor molecules.

answer

i think the answer is a) as air pressure in an area increases, the density of the gas particles in that area decreases.

hope it

c- cold periods in earth's history during which glaciers covered much of the surface.

explanation: