'Calculating empirical formula' diaporamas de présentation

Elements and Compounds

Elements and Compounds. elements combine together to make an almost limitless number of compounds the properties of the compound are totally different from the constituent elements H 2 (g) + O 2 (g) ? H 2 O(l). Formation of Water from Its Elements.

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The MOLE

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Unit #3 CDA Review Material

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Percent Composition, Empirical and Molecular Formulas

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Empirical Formula

Empirical Formula. Empirical Formula. the empirical formula of a chemical compound is the simplest whole number ratio of atoms of each element present in a compound. The empirical formula is used as standard for most ionic compounds, such as CaCl 2

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Percentage Composition

part whole. 24 g 95 g. % = x 100. % Mg = x 100. 24.305. 35.453. Mg. Cl. 12. 17. magnesium. chlorine. Percentage Composition. (by mass...not atoms). 25.52% Mg. Mg 2+ Cl 1-. 74.48% Cl. MgCl 2. It is not 33% Mg and 66% Cl. 1 Mg @ 24.305 amu = 24.305 amu

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Empirical Formulas

Empirical Formulas. Unit 5. Percent Composition. Percent composition is a number that tells us how much of an element makes up a compound The formula used to calculate percent composition is:.

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10-3: Empirical and Molecular Formulas

10-3: Empirical and Molecular Formulas. Percentage Composition. The mass of each element in a compound, compared to the mass of the entire compound (multiplied by 100) Tells you the percent of the mass made up by each element in the compound. How to calculate % comp:.

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Percent Composition, Empirical Formula and Molecular Formula

Percent Composition, Empirical Formula and Molecular Formula. 10.4 summary. Percent Composition. 1 pizza 2 slices pineapple 6 slices pepperoni 4 slices cheese What % of the pizza slices are pineapple? pepperoni? just cheese?.

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Empirical Formula vs. Molecular Formula

Empirical Formula vs. Molecular Formula. Empirical formula: the formula for a compound with the smallest whole-number mole ratio of the elements

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Empiricial vs. Molecular Formulas

Empiricial vs. Molecular Formulas. A molecule that contains the smallest whole number ratio of elements within the compounds CH 2 O The subscripts CANNOT be reduced. A molecule that shows the actual number of elements within the compound C 2 H 4 O 2 The subscripts CAN be reduced.

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