If you double the average speed of the molecules in a gas, by what factor does the pressure change?10/27/2023 This number is called the Avogadro constant, N A. Laboratory experiments show that the number of atoms in a 12-g sample of 12 C is equal to 6.02 x 10 23 mol -1. " the amount of any substance that contains as many atoms/molecules as there are atoms in The mole is a measure of the number of molecules in a sample, and it is defined as In relating the effects of the motion of atoms and molecules to macroscopic observables like pressure and temperature, we have to determine the number of molecules in the gas. It is however clear that the pressure exerted by a gas is related to the linear momentum of the atoms and molecules, and that the temperature of the gas is related to the kinetic energy of the atoms and molecules. The laws of classical thermodynamics do not show the direct dependence of the observed macroscopic variables on microscopic aspects of the motion of atoms and molecules.
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