The internal energy of 10 moles of helium (a monatomic gas) is 15 kJ. What is the rms speed of the molecules? (The molar mass of helium is 4.00 g/mole.)

Explanation:

Hello,

In this case, since the rms speed of the molecules is computed by:

Whereas the absolute temperature is computed from the internal energy (by using the Cp of helium (3.1156 J/g*K) as shown below:

Thereby, the rms speed results:

Regards.

beta decay is the answer

indium, and thallium have three electrons i think