00:01
So initially we were given the mass of oxygen oops i'm doing this one giving the mass of oxygen over the mass of nitrogen the ratio of that was 12 over 7 and that is in 2 .3 alright we know that the number of moles is mass over mullamah that's the you know, the general equation for that.
00:37
So if you isolate m, m will be the number of moles times more mass.
00:44
So in the next binary compound, the mass of oxygen over the mass of nitrogen, the ratio was given us 16 to 7.
01:01
We know that the mass is giving us that.
01:05
So now we go to the amount of oxygen is determined the number of modes of oxygen and the more amount of oxygen over the number of modes of nitrogen times the molar mass of nitrogen so the number of modes of oxygen we don't know the number of most of nitrogen we don't know mular mass of oxygen is 16 it's 16 over mular mass of nitrogen is 14 so everything they do that is 16 is going to be equal to 16 of my 7.
01:43
Take 16 can cancel that 16, 14, this will be 2.
01:48
So you've got this times half equal 1.
01:58
So the ratio of the number of most of oxygen to the number of most of hydrogen that's going to be equal to 2 is multiplied to divide 2.
02:11
So the ratio is going to be 2 is to 1, which is so then for the compound that we're looking for the chemical formula is going to be an 02 because oxygen is 2, nitrogen is 1.
02:28
So that's going to be in that.
02:33
Now for the second part of the question, so if you, the first ratio was given us 12 over 7.
02:42
So that was 12 over 7 and then we went to 16 over 7.
02:51
So you can see, what is it? so we got 12 over 7 and then the next ratio of the masses of 16 over 7.
03:02
So the next one by proportion is going to be 20 over 7.
03:12
Right? so the number of moles of oxygen over the number of moles of nitrogen over the number of moles of nitrogen is going to be, you know, so for this is going to be mass over molar mass.
03:33
It's also going to be mass over molar mass.
03:37
So the number of modes of oxygen is going to be 20.
03:49
So that's 20.
03:51
That's the mass over oxygen.
03:56
That's 16...