 Welcome to Avogadro's Deli. We're going to use the recipes for two sandwiches to understand mole ratios in molecules. The recipe for a water sandwich is that it contains two slices of bread or hydrogen atoms and one slice of ham or oxygen atom per sandwich. So if we look at that in terms of moles, we know that if we have one mole of water, we have two moles of hydrogen and one mole of oxygen, even though we only have one mole of water. Similarly, we have one sandwich. We have two pieces of bread and one slice of ham. That makes one sandwich. So when you're thinking about mole ratios, if you think of it as a molecule as being a sandwich, you can see how it can have different moles of a component, but still only make up one total mole. Similarly, we have the recipe for a sulfuric acid sandwich where we have two slices of bread, again the hydrogen atoms, one slice of Swiss cheese which can represent our sulfur atom, and four slices of ham to represent our oxygen atoms. So again, even though we only have one sandwich, we have multiple components. And so even though we only have one mole of sulfuric acid, we would have two moles of hydrogen, one mole of sulfur, and four moles of oxygen.