00:01
So here in this question we need to print out how many grams of lead? lead are contained in a mixture of 0 .155 kilogram of pbc l -h and pbc l -o -h and pb2 cl2 -c -o3.
00:21
So these are the two compounds and these two compounds are contained and mass is 150, 0 .155 so from that we need to find out the mass of let usher.
00:33
So let's consider the first compound first.
00:40
So this 1 .0155 kilogram needs to be converted into gram for our further calculation.
00:47
Therefore it will be 155 grams.
00:50
So the molar mass of pbcl or h is 259 .66 gram per more.
00:59
Okay, so what we can what we are going to do is we are going to find out the number of most of pbcl oh h so number of moles of b b ploh from the given mass that is 155 gram divided smaller mass 2509 .66 gram per mall and we will get 0 .5969 more so in one 1 mall of pbcl -h, 1 -mall of lead atoms are present.
01:36
Let's write that fact.
01:40
In 1 mall of pb -cl -h, 1 -mol of lead atom is present.
01:52
And therefore the number of moles of lead which is exactly equal to the number of of pdcloh as well, 0 .5969 .0 .5969 more.
02:07
So in order to find out the mass of lead, what we are going to do is we just multiplying the given mass with this calculated amount of substance.
02:21
So the mass of lead which is equal to 0 .5969 and its molar mass is 207 .2 gram per mole.
02:32
So the mass of the substance is 123 .67 gram...