To solve stoichiometry problems using the mole concept, here are some simple steps to follow:

1. Balanced Equation: Start by writing and balancing the chemical equation.

   For example, when hydrogen and oxygen react to make water, it looks like this:
   $2H_2 + O_2 \rightarrow 2H_2O$

2. Convert Units: If you have measurements in grams, liters, or molecules, change them into moles. You can use a special number called Avogadro's number, which is about $6.022 \times 10^{23}$. This number tells us how many particles are in one mole.

3. Mole Ratios: Look at the coefficients (the numbers in front of the molecules) in your balanced equation. These help you set up mole ratios.

   For instance, if you have 2 moles of $H_2$, you will need 1 mole of $O_2$ to react with it.

4. Calculate Required Amounts: Finally, use the mole ratios to figure out the unknown amounts you need.

By following these steps, you can easily solve stoichiometry problems!