Mole Ratio for N2 + H2 = NH3

Find the mole ratio for a chemical equation is a key chemistry skill. In this video we&determine the mole ratio between molecules in the equation N2 + H2 = NH3. We&also briefly discuss the importance of these ratios in reaction stoichiometry. One of the main reasons we balance equations, like N2 + H2 = NH3, is to be able find the coefficients for each substance. The coefficients (number in front of the molecules) give us the ratio between molecules. Using the ratio, if we are given any amount of moles for one type of molecule, we can find the amount (in moles) of the other compounds. For example, the balanced equation 2N2 + 3H2 = 4NH3 tells us that we have 2 moles of N2 for every 4 moles of NH3. So if an exam question stated that you have 1.6 mole of N2 you would know that you get twice as many moles of NH3. And we can convert moles to grams if we need the mass. For more help with mole ratios, reaction stoichiometry, moles to grams conversions, and more: Note that mole ratio sometimes called "molar ratio".