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Unformatted text preview: STUDY GUIDE/SUGGESTED PROBLEMS Chapter 1: Typical Test Questions: 1. Perform the following calculations, reporting the answer to the correct number of significant figures and reporting the answer in both scientific notation and decimal notation. a. 2.64E4 x 1.15E-3 d. 32.5 x 1.0E-3 b. 205.1 + 1.386 e. 1.3E4 – 5.41E3 c. 14.69 / 1.1E5 f. 14.3 – (12.12 x 0.650) 2. How many feet are there in 0.50 km? 3. How many ml are there in 1.25E-2 L 4. If the students in a particular class are 40% male and 60% female and there are 16 males, what is the number in the total class? How many females in the class? 5. What is the volume occupied by 15.2g of a material with a density of 2.41 g/ml? 6. Convert 87 ° F into ° C and ° K. Convert -40 ° C into ° F and ° K. Chapter 2: Typical test questions: 1. An atom has an atomic number of 17 and an atomic weight of 35. How many protons, electron, and neutrons. 2. A fluoride ion has an atomic number of 9, and atomic mass of 19, and a charge of – 1. How many electrons, protons, and neutrons. 3. How many protons, electrons, and neutrons does a typical calcium cation have? 4. In the following, supply the name or the formula, depending on what is missing. Hydrogen peroxide NaF Nitric acid FeSO 3 Ammonia HClO 4 Benzene H 2 CO 3 Magnesium nitrate Sn(OH) 2 Aluminum carbonate KHSO 4 Copper (I) phosphate Mg(CN) 2 Potasium acetate AgF Silver oxide NH 4 NO 3 Zinc hydroxide LiCH 3 COO Ch 3: Typical test questions: Consider the following reactions in answering the questions below: a. 2 NaOH(aq) + H 2 SO 4(aq) 2 H 2 O (l) + Na 2 SO 4(aq) b. Ag (S) + H 2 S (g) Ag 2 S (s) + H 2(g) c. CaCO 3(s) + HCl (aq) CaCl 2(aq) + CO 2(g) + H 2 O (l) d. Fe(OH) 3(s) + H 3 PO 4(aq) FePO 4(aq) + H 2 O (l) 1. The first reaction is balanced. Balance the rest of the reactions. 2. How many moles of Na 2 SO 4 could be produced from 0.23 moles of NaOH in a? 3. How many moles of sulfuric acid would be consumed in the above reaction? 4. How many grams of Ag 2 S would be produced by the complete reaction of 0.25 moles of hydrogen sulfide in b? 5. If, in c, the reaction produced 2.42 g of CO 2 , how many grams of CaCO 3 reacted (assuming 100% yield)? 6. Assume that you started with 15.1g of Fe(OH) 3 and 25.2 g of phosphoric acid, what is the potential yield of FePO 4 ? Which reagent was limiting? How much of the excess reagent is left after the reaction? If the yield of Iron(III) phosphate were 17.9g, what was the % yield? 7. If I dissolve 25.3 g of HCl in 0.360 L of total solution, what is the molarity of the solution? How many moles of HCl would there be in 450 ml of this solution? What volume of solution would I need to take if I needed 15.1 g of HCl?...
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This note was uploaded on 01/16/2009 for the course CHEM 1411 taught by Professor Moses during the Fall '08 term at A.T. Still University.

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