'Mol o' presentation slideshows

Percent Composition

Percent Composition. 10.3. Percent Composition. I think you already know how to do this?. What did Bob score on his test? How do you figure it out?. 87 / 100. Bob. What did Bob score on his test? How do you figure it out? Part X 100 = 87

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Empirical Formula

Empirical Formula. From percentage to formula. The Empirical Formula. The lowest whole number ratio of elements in a compound. The molecular formula the actual ratio of elements in a compound The two can be the same. CH 2 empirical formula C 2 H 4 molecular formula

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Chap 12

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% Composition, Empirical Formulas, & Molecular Formulas

% Composition, Empirical Formulas, & Molecular Formulas. Chapter 9 sections 3 & 4. % Composition. % = (part / whole ) x 100 When calculating the % composition, you are calculating the % of each element in a compound. % Composition. Calculate the % Composition of MgO. Mg = 24.31g O = 16.00g

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III. Formula Calculations (p. 226-233)

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The Mole Hill

The Mole Hill. Grams to Moles to Moles to Grams. Objective 5-6. SWBAT calculate molar mass and use it to convert between grams and moles. (Yes, this is the same objective as last week ). Grams to Moles. Review: Use molar mass! How many moles of H 2 O do I have in 25 grams of H 2 O?.

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II. Formula Calculations

The Mole. II. Formula Calculations. A. Percentage Composition. the percentage by mass of each element in a compound. 127.10 g Cu 159.17 g Cu 2 S. 32.07 g S 159.17 g Cu 2 S. A. Percentage Composition. Find the % composition of Cu 2 S. ? 100 =. %Cu =. 79.852% Cu. %S =. ? 100 =.

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National Transportation Safety Board

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Empirical and Molecular Formulas

Empirical and Molecular Formulas. Determining Empirical Formulas. Definition: the lowest whole number ratio of elements in a compound. Steps to determine empirical formulas: 1) find moles of each element [find the moles of H 2 0 if compound is hydrated].

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Molecular Formula

Molecular Formula. Represents the actual number of atoms of each element in compound Not necessary for ionic compounds Necessary for covalent compounds The molecular formula for water is H 2 O , and the empirical formula for water is H 2 O

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Unit: Chemical Quantities

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UNIT 4

UNIT 4. Percent Composition. Calculating Mass % (or Weight %). Once you have the correct chemical formula for a compound, you can calculate the percent by mass of any element or ion in the compound: mass % of an element in a compound = 100 x mass of the element in the compound

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Molecular Formulas

Molecular Formulas. A molecular formula is either the same as an empirical formula or it is a ?simple whole number multiple of its empirical formula. Determining Molecular Formulas.

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Molar Mass 1) 17.04 g 2) 342.05 g Conversions 1) 1.39 mol Ar 2) 1.31 x 10 g C

Level Stoich Study Guide Answers. Molar Mass 1) 17.04 g 2) 342.05 g Conversions 1) 1.39 mol Ar 2) 1.31 x 10 g C 3) 1.67 x 10 atoms P Empirical Formula 1) C H O 2) FeTiO Molecular Formula 1) C H O 2) C H. -18. 24. 8. 9. 4. 3. 4. 6. 4. 6. 6.

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Percent Composition 1) 65.95% 2) 20.09% Stoichiometry 1) 42.5 mol O 2) 1798 g Fe O

PAP Stoich Study Guide Answers. Percent Composition 1) 65.95% 2) 20.09% Stoichiometry 1) 42.5 mol O 2) 1798 g Fe O Limiting Reactants 1) Limiting = 124 g Fe; Excess = 180 g O 2) Limiting = 35.3 g Fe; Excess = 224 g O Percent Yield 1) 42% 2) 93.2% 3) 91% 4) 85.7%. 2.

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