91008Lecture_7

91008Lecture_7 - Mass • Multiply by 100 Let’s Practice...

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Announcements Workshops will start next week…. Look for sign-ups tomorrow… Service Learning Sign-ups Sophomores see me…not required…but if you are interested…. Graduate Reviews – tonight….#2 in book.
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Compounds Bonding Ionic Bonding Covalent Bonding
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Compounds Formula Ratio of elements in a compound 3 kinds (empirical, molecular, structural) Molecular masses from chemical formulae
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Compounds Naming Cation 1st by name, Anion change suffix to -ide Use di, tri, tetra to indicate how many atoms of one type present Polyatomic ions - page 54 - must know!
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Let’s Practice CaO Calcium hydroxide • CaCO 3 • SiO 2 • MgBr 2 Phosphorus pentafluoride
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Percent Composition Molecular Formula Calculate Molecular Mass Divide the atom mass by the Molecular
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Unformatted text preview: Mass • Multiply by 100 Let’s Practice • Phosphorus tribromide (% bromide) • Magnesium Chloride (% chloride) • Iron (III) chloride (% iron) • C 5 H 12 O (% C, % H, %O) How about the reverse? Yes, but a bit more complicated! – Empirical Formula – Molecular Formula What is the Empirical formula of a compound made of Phosphorus and Chlorine that is 77.45 % Chlorine? % to mass…… Mass to moles…. Divide by small…. Multiply till whole. How about the reverse? Yes, but a bit more complicated! – Empirical Formula – Molecular Formula What is the Empirical formula of a compound made of Phosphorus and Chlorine that is 77.45 % Chlorine? If the Molecular Mass is 137.3327 g/mol, what is the Molecular Formula?...
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91008Lecture_7 - Mass • Multiply by 100 Let’s Practice...

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