Question

How do u solve stoichiometry

Answer 1

Is there an example you have in mind or do you want someone to just provide you with one?

Answer 2

The purpose of stoichiometry is to help calculate the relative amounts of reactants and products in a reaction.
There are 4 steps to stoichiometry.

1) Complete/balance the equation
2) Convert to moles
3) Multiply by the mole ratio (coefficient want/coefficient have)
4) Convert from moles

Ex: When 29 L O2 reacts with Al at STP, what mass of Al2O3 forms?

To start this equation, you need to find the equation and balance it.
Regular equation: Al + O2 > Al2O3
Balanced equation: 4Al + 3O2 > 2Al2O3

Then, you would convert from liters to moles: 29/22.4=1.29
Then, you would multiply the moles you just found by the coefficient of the reactant you want/coefficient of the reactant you have. So, the equation would be 1.29 x 2/3 = .86 moles of Al2O3.
To convert back to moles, you would multiply the moles you just found (.86) by the molar mass of the product (Al2O3), so .86 x 101.96 = 87.69g Al2O3