00:02
In this problem, we are given a certain metal sulfide with the equation in ms2, and we are given that it is 40 .06 % sulfur by mass.
00:23
To solve this problem, we would also need the molar mass of sulfur because it is our only known metal, which is 32 .06.
00:34
And to approach this problem, we can first use our molar ratio.
00:43
For sulfur, we know that it is the metal sulfide is composed of 40 .06 percent, so we can calculate its molar ratio.
01:03
And for unknown metal, we will have 100 minus 40.
01:11
0 .06 % because this metal sulfide is only composed of two elements, so we know the rest of the percent would be the metal.
01:23
We do not know the molar mass of the unknown metal.
01:28
We can say x is our molar mass, which will give us our molar ratio, let's call m.
01:38
Now in this equation, we we know that per one mole of this unknown certain metal, we will have two sulfers.
01:49
So if we divide this, we would know that the unknown metal would have a smaller molar ratio because it has a smaller integer in the empirical formula.
02:02
So we would need to divide both the ratios by the little m because that is our smaller ratio...