CHEM 1127Q Lecture Notes - Lecture 11: Empirical Formula
27 Feb 2019
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Topics covered: 4. 1 writing and balancing chemical equations. Ex. a laboratory analysis of vanillin , the flavoring agent in vanilla, determined the mass percent composition: c, 63. 15%; h, 5. 30%; o, 31. 55%. Take the lowest value and divide it by each answer. Multiply by a number that will give you a answer closest to a whole number. 2. 666 x 3= 7. 99 2. 666 x 3= 7. 99 1 x 3= 3. Therefore, the empirical formula is h o. 1. the substances undergoing reaction are called reactants , and their formulas are placed on the left side of the equation. formulas are placed on the right sight of the equation. The substances generated by the reaction are called products , and their. The relative numbers of reactant and product species are represented by coefficients (numbers placed immediately to the left of each formula). 4. labels are used to indicate the physical state: (g) gas (l) liquid (s) solid (aq) aqueous [dissolved in water]
