Compare (a) the number of atoms and (b) the num ber of grams present in 1.00 mole of helium and 1.00 mole of argon .

Stage in which a typical star has completely stopped fusion

What happens to the average kinetic energy of a gas when the particles of the gas collide against each other at a constant temperature and volume? explain your answer.

What causes different colors to appear in the sky? the absorption of light by air molecules the reflection of light by bodies of water the greenhouse effect in earth's atmosphere the scattering and reflection of light by dust particles