00:01
So we have given volume v that is 150 .0 milliliter.
00:11
So this is divided by 1 ,000 milliliter because we know that 1 liter consists of 1 ,000 milliliter.
00:19
So that will be 0 .150 liter.
00:24
Then we have temperature t, that is 25 degrees celsius.
00:40
That is 25 plus 273, that is 298 kelvin.
00:50
Then we have osmotic pressure pi.
01:05
So that is 8 .44 tor.
01:13
So now we know that since one tor, or we should say that, one since one atmosphere okay so that is equals to 760 tall so now divided by 760 tall so this osmotic pressure will be in atmosphere that is 0 .0 1 1 atmosphere okay and we have mass of unknown compound w so that is 15 .2 milligram okay so now since one gram consists of thousand milligrams so to convert milligram to gram we will we can write 15 .2 multiplying 10 raise to power minus 3 gram okay okay, so now the concept involved here is osmotic pressure and this says that since pi osmotic pressure that is equals to c r t.
02:59
So c is the molar concentration.
03:03
Okay, r is the universal gas constant t is the temperature in kelvin...