00:01
In this question the chemical reaction takes place as follows.
00:18
We have four molecules of iron, four atoms of iron which reacts with three molecules of oxygen gas to produce two molecules of fe2o3.
00:35
And we have to find the mass of fe2o3 that ferric oxide produces.
00:41
So in this reaction we can say four moles of iron metal reacts with three molecules of oxygen gas to produce two moles of ferric oxide that is fe2o3.
01:15
So in the question we have been given the weight of iron metal that is given as 5 .50 grams and we know that in molar mass of iron that is equals to 55 .84 grams per mole.
01:39
So therefore number of moles of iron this will be equal to given mass that is 5 .50 grams and then divided by molar mass that is 55 .84 grams per mole.
01:55
This implies number of moles of iron will be equal to 0 .098 moles.
02:06
We further if you look at the question since four moles of iron react with three moles of oxygen to produce two moles of ferric oxide.
02:16
So we can say since four moles of iron reacts with three moles of oxygen and we have only 0 .098 moles.
02:38
So we will find how many moles of oxygen are required...