AN ADD ON TO THE SUPER FUN W/E HE WROTE....its down below

You see, the last blogger wrote some random stuff about molar ratio and finding moles of different elements....yay....thats such loser stuff. THIS IS THE REAL STUFF.  This is what seperates pros from well people like the last blogger.  Anyway this is an add on to his lesson, this goes further into what stoichiometry is all about....annoying the heck out of people.

Instead of just finding moles of this and that, this time we will convert something like 5 moles of oxygen to 10 grams of what the hell.  The first step is to write out a balanced equation and find the molar ratios.  Then you will convert the number of moles of one element to another element.  Then you would do the same conversions you did in the previous chapters such as multiplying by 6.022 to the power of 23 to find the number of atoms.

It seems confusing and yes it is but this example will explain everything!  If not go read another blog or read the last bloggers post and then read another blog.

                                                  1 PbCl2 + 1 Mg = 1 MgCl2 + 1 Pb

find out how many grams of lead is needed to react with 5 moles of Mg.  Using the mole ratio we look at the place we are going over the where we are.  So when we convert it, it turns to 5 moles Pb.  Now we turn Pb into grams.  We multiply it by its molar mass.  It should be 207.2 times 5 =  1036 grams. The answer is we need 1036  grams of lead is needed to react with 5 moles of Mg.

Now if we changed the question to how many atomes of Pb is needed to react with 48.6 grams of Mg.  Then we will have to change Mg to moles by dividing it by its molar mass and it will be 2.  Then doing the exact same use the molar ratio from Mg to Pb and you will get 2 moles of Pb.  Now instead of going to grams you are going to molecules.  You are going to multiply 2 moles of Pb by 6.022 to the power of 23.  Now that is your answer.

Some cool teacher person talking for a long time non stop about some chemistry thing.  Not sure what it has to do with anything but watch it anyway. She literally talks for the whole time, go grab some popcorn its gonna be a long day.




cool story teacher, very cool.  Gonna watch that again