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The
Chemistry Workshop Ungrouped
Chemistry Homework for 4/13 - 4/26 On Monday & Tuesday of next week, we will review Chapter 7 in class. If you want to use a copy of the assigned textbook instead of a
classroom copy, then please bring your own copy. The exam is next Wednesday, April 15. It is multiple-choice & short answer. What to Study: --Vocabulary --Homework questions & answers --Class notes --Class practice sheets & review material **Be able to name & write formulas of organic compounds **Focus on the "Intro to Organic Chem" and
"Polymers" articles and the naming/formula-writing worksheet &
review materials *********************************************************************************************************For
Chapter 8--This chapter contains lots of calculations. Any
time you do a math calculation: Please draw a box around your answer and show
your work. Thursday,
4/16--Read 8-1 and answer these questions. Questions 1-3 are from "Something To Think About--Sir Hugh's Book" 1. (a) Who is Sir Hugh Beaver? (b) What is his famous book? (c) When was it first published? 2. (a) List the 2 facts you find most amazing. (b) Why is the word "astronomic" used with really big numbers? 3. How many copper atoms would fit inside a common soil bacterium? 4. (a) What is a "mole"? (b) Why do chemists use the word "mole" to keep track of the numbers of atoms? (c) How many copper atoms are in 1 mole of copper atoms? (d) How many water molecules are in 1 mole of water? (e) How many eggs are in 1 mole of eggs? (e) What is Avogadro's Number? 5. Explain how using the word "mole" is like using the word "dozen" or "gross". 6. Study Table 8-1 & figure 8-2, and page 275. Do these calculations. Please draw a box around your answer and show your work. (a) How many eggs are in 45 dozen eggs? (b) How many sheets of paper are in 5 reams of paper? (c) How many atoms are in 1.9 moles of copper atoms? (d) How many sodium atoms are in 6.8 moles of sodium atoms? (e) If you had 4.5 x 1025 carbon atoms, how many moles of carbon do you have? (f) How many moles of water molecules are in 1.3 x 1020 water molecules? Friday,
4/17 & Over the Weekend--Read 8-1 and answer these questions. 7. What quantity of objects is represented by the word "mole"? 8. What value do you use for Avogadro's number in a calculation? 9. When do you use Avogadro's number? 10. 1 mole of K2CrO4 contains 2 moles of potassium ions but only 1 mole of chromate ions. EXPLAIN. 11. Study the "How To" on page 276 & "Sample Problems" 8A & 8B on page 277. Please draw a box around your answer and show your work. (a) How many sodium atoms are contained in 6.7 moles of sodium? (b) How many xenon atoms are contained in 0.35 mole xenon? (c) How many moles of fluorine atoms are in 4.56 x 1019 fluorine atoms? (d) How many moles of silver are in 1.23 x 1027 silver atoms? Monday,
4/20--Read 8-1 and answer these questions. Please draw a box around your answer and show your
work. 12. (a) What is the mass of a proton? (b) What is the mass of a neutron? (c) What is the mass of an electron? 13. Calculate the mass of a Chlorine-35 atom. It has 17 protons, 18 neutrons, and 17electrons. 14. The other kind of chlorine atoms are chlorine-37 atoms. They have 17 protons, 20 neutrons, and 17electrons. Calculate their mass. 15. Chlorine-35 and chlorine-37 are Isotopes. Define "isotope". 16. Study Sample Problem 8C. Complete Practice Problems #1 and #2 on page 279. 17. Study figure 8-4. (a) Calculate the mass of 1.2 moles of helium atoms. (c) How many moles are in 350 grams of Lead atoms? (b) Calculate the mass of 0.44 moles of gold atoms. (d) How many moles are in 0.45 grams of nitrogen atoms? Tuesday,
4/21--Read 8-1 and answer these questions. Please draw a box around your answer and show your
work. 18. Define Molar Mass. 19. Study Sample Problems 8D & 8E. (a) Determine the mass in grams of 4.87 moles of Argon atoms. (b) Determine the mass in grams of 0.098 moles of Boron atoms. (c). Determine the number of moles in 548.9 grams of Iron atoms. (d) Determine the number of moles on 0.087 grams of calcium atoms. 20. Study Sample Problem 8F. (a) Find the mass of a single Sulfur atom. (b) Find the mass of a single Uranium atom. Wednesday,
4/22--Read 8-2 and complete these questions. 21. Study Sample Problems 8i and 8j. Complete Practice Problems #1 & #2 on page 292. 22. Study Sample Problem 8k. Complete Practice Problems #1 & #2 on page 294. 23. Study Sample Problems 8l. Complete Practice Problems #1 & #2 on page 295. Thursday,
4/23--Review Chapter 8. Complete
these "Section Review" questions on page 297. #9a,b, & c, #10 a, b, c, & d Friday,
4/24 & over the weekend--Complete the Chapter 8 Calculations Party Handout
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