A weather balloon containing 3.50 kg of helium gas, is released from a location at which the temperature is 20.0°C and the pressure is 101 kPa.The pressure inside the balloon is equal to the exterior pressure. (Note: the mass of a helium molecule is 4u, u=1.66×10-27kg, R=8.314J/mol-K, kB=1.38×10-23 J/K, Avogadro number NA= 6.023×1023mol-1) c)The balloon raises to a location where the temperature is -39°C and the pressure is 25kPa. If the balloon is free to expand so that the pressure of the gas inside is equal to the ambient pressure, what is the new volume of the balloon?

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Diatomic Gas

Molecule, is a collection of two or more atoms together (which constitute the smallest observable unit) into a pure material. There are some ways to represent the structure of a molecule. Factor symbols represent atoms in Lewis structures, and dots represent electrons that accompany them. A pair of mutual electrons (covalent bond) may be represented by a single dash. The ball-and-stick model depicts the spatial structure of the atoms better.