The molar density of a gas tells
you the average number of molecules per cubic metre of the gas.
Not exact matches
Also, the overall
number of ozone
molecules destroyed in a vertical column
of air was pretty much the same as the
number of molecules transported into this column by the
average poleward and downward transport
of air in the stratosphere.
Figure 2: Total column ozone loss relative to pre-ozone hole conditions in the 1970s in percent (left) and total
number of molecules (right)(1 DU = 2.69
molecules / cm2)
averaged over 2010 - 2019, during September for the Southern Hemisphere and March for the Northern Hemisphere.
The
number of molecules passing through unit area per unit time multiplied by the
average energy carried per
molecule.
For small
numbers of molecules, temperature is no longer strictly proportional to the
average kinetic energy.
The
average kinetic energy
of a
number of molecules is not independent
of height.
(If you did the same experiment with, say, only 5
molecules in one chamber and 1 in the other, then while most
of the times [on
average 5/6] that you tried the experiment you would see the
number of molecules in the high pressure chamber decrease and the
number in the other increase, if you ran the experiment enough times you would in fact see a case where the 1
molecule in the low pressure chamber went into the high - pressure chamber so that the flow went the «wrong way».
For conduction, which occurs via molecular (or electronic) collisions, you will have collisions between
molecules... and the
molecules will have a range
of velocities but ON
AVERAGE, those coming from the hotter side of the object will have slightly higher speeds than those coming from the cooler side and so, in a large number of collisions, the molecules from the cooler side will gain speed on average and those from the hotter side will lose speed on average in the coll
AVERAGE, those coming from the hotter side
of the object will have slightly higher speeds than those coming from the cooler side and so, in a large
number of collisions, the
molecules from the cooler side will gain speed on
average and those from the hotter side will lose speed on average in the coll
average and those from the hotter side will lose speed on
average in the coll
average in the collisions.
Monthly and weekly mean CO2 concentrations are determined from daily
averages for the
number of CO2
molecules in every one million
molecules of dried air (water vapor removed).