Homework 6 (Chapter 3)-problems (1)

Homework 6 (Chapter 3)-problems (1) - ruisi(hhr239 –...

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Unformatted text preview: ruisi (hhr239) – Homework 6 (Chapter 3) – sutcliffe – (50985) 1 This print-out should have 20 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. This homework is entirely on Chapter 3 to give you some Quest practice on moles, grams and stoichiometry. 001 10.0 points Avogadro’s number is really big. If you had 6.02 × 10 23 dollars, and could spend it at $1 billion (10 9 ) per second for the rest of your life (let’s say 80 years), approximately what percentage of your original money would you have left when you die? 1. 95% 2. 100% 3. 90% 4. 50% 5. 10% 6. 75% 7. 0% 002 10.0 points Which one has the greatest number of atoms? 1. 3.05 moles of argon 2. All have the same number of atoms 3. 3.05 moles of helium 4. 3.05 moles of water 5. 3.05 moles of CH 4 003 10.0 points If one electron weighs 9 . × 10- 28 grams, what is the mass of one mole of electrons? 1. 5 . × 10- 23 grams 2. 5 . 4 × 10- 4 grams 3. 9 . × 10- 18 grams 4. 1 . 5 × 10- 51 grams 5. 5 . × 10- 24 grams 004 10.0 points What is the molar mass for fluoxetine (C 16 H 16 F 3 NO), also known as Prozac circlecopyrt R ? 1. 295.3 g/mol 2. 281.3 g/mol 3. 297.1 g/mol 4. 279.3 g/mol 005 10.0 points Calculate the density of propanol C 3 H 8 O if you know that there are 1 . 069 × 10 25 molecules of propanol in 1.35 L.of propanol in 1....
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Homework 6 (Chapter 3)-problems (1) - ruisi(hhr239 –...

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