00:01
We have to answer several questions about ideal gays.
00:03
So in the first question, we have to calculate the number of moles.
00:07
According to clapperon -mendilef equation, pv equals to new rt, and therefore, new or number of moles, equals to pv over rt.
00:18
So here we have to, i've already converted atmospheres to pascals, and we have to convert also 20 degrees c to kelvin's, 20 .0 degrees equals to 293 kelvin.
00:35
So therefore number of moles equals to 101 325 pascals multiplied by one cubic meters and divided by gas constant and the temperature.
00:58
So i'm going to use a calculator to get a result.
01:03
Here equals to 41 .6 moles.
01:19
So now let's answer question b.
01:23
Here we have 20 in here we have one more of material one mole of air with a mass of 28 .9 grams so therefore molar mass is equals to 28 .9 grams per mole which is 28 .9 10 power by negative 3 kilograms per mole.
01:57
So, and we have to calculate the density...