The temperature of a gas is a measure of
- Athe average kinetic energy of gas molecules.
- Bthe average potential energy of gas molecules.
- Cthe average distance between the molecules of a gas.
- Dthe size of the molecules of a gas.
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The kinetic energy of one gram molecule of a gas at normal temperature and pressure is $(R = 8.31\,J/mol\cdot K)$.
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Two gases $A$ and $B$ are at absolute temperatures $360 \ K$ and $420 \ K$ respectively. The ratio of average kinetic energy of the molecules of gas $B$ to that of gas $A$ is
$A$ balloon has $5.0$ $g$ mole of helium at $7^{\circ} C$. Calculate
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$(a)$ the number of atoms of helium in the balloon,
$(b)$ the total internal energy of the system.
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