CHEM 14A Chapter Notes - Chapter L 1-2: Stoichiometry, Molar Mass, Chemical Equation

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Sometimes we need to know how much product to expect from a reaction, or how much reactant we need to make a desired amount of product. N2 (g) + 3h2 (g) 2nh3 (g) 1 mol n2 is chemically equivalent to 3 moles of h2. 1 mol of n2 is chemically equivalent to 2 moles of nh3. Mole-to-mole predictions: oxygen reacted with hydrogen to produce water. How much water is formed when 0. 25 mol o2 reacted with hydrogen: 2h2 (g) + o2 (g) 2 h2o (l, 1 mole o2 is equivalent to 2 moles h2o ii. iii. sunbstance required substance given. 1mol o2 amount of water produced=. 25mol o2 x. H2o: the balanced chemical equation for a reaction is used to set the mole ratio, a factor that is used to convert the amount of one substance into the amount of another. 55. 85 g. mol 1 =. 179 mol fe: amount of fe2o3 (mol) = 0. 179 mol fe x.

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