The rms speed of oxygen molecules is 460 m/s at 0°C. The atomic weight of an oxygen atom is approximately 4 times the atomic weight of a helium atom. However, the helium molecule is monatomic whereas the oxygen molecule is diatomic. The rms speed of helium at 40°C is approximately O 880 m/s 440 m/s O 1.08 km/s O 3.68 km/s

A spherical balloon of volume 4.07 x 10³ cm³ contains helium at a pressure of 1.21 x 105 Pa. How many moles of helium are in the balloon if the average kinetic energy of the helium atoms is 3.60 x 10-2² J? mol

What is the average (rms) velocity of nitrogen (diatomic) gas molecules at 20 degrees Celsius?

An argon-40 atom has a mass of 6.64 ✕ 10−26 kg. (a) What temperature (in K) would a gas composed entirely of argon-40 atoms have to be at in order for the rms speed of the atoms to equal the escape speed from Earth, 1.12 ✕ 104 m/s?  K (b) What temperature (in K) would a gas composed entirely of argon-40 atoms have to be at in order for the rms speed of the atoms to equal the escape speed from the Moon, 2.37 ✕ 103 m/s?  K