Chemistry Practice Exam v2 Directions: It is important that you provide answers in your own words. Please focus only on information from the text/eBook to create your own solutions. Please do not use direct information from an outside source (especially copying and pasting from an “answer” website). Use of direct information from an outside source is against school policy. All answers will be checked for plagiarism. Instances of plagiarism can result in probation or possible dismissal from the school. Please be sure to follow all guidelines (number of sentences/showing all calculations) and to provide the correct metric units of measure. All questions are 3.33 points each (.33 for unit) 1. A student collected the following data for a fixed volume of gas: Temperature (⁰C) Pressure (mm of Hg) 10 726 20 750 40 800 70 880 100 960 150 1085 Fill in the missing data point. Show all calculations leading to an answer. The General Law of Gases states that P1*V1/T1 = P2*V2/T2. As Volume is constant, we can write this as P1/T1 = P2/T2, P1 and T1 are the pressure and temperature at time 1. P2 and T2 are the pressure and temperature at time 2. You can take any pair of values as P1 and T1 and find P2 = P1T2/T1, once you sum 273.15 to each temperature to get kelvins. P1 = 726 mm Hg T1 = 10 + 273.15 = 283.15 K; T2 = 150 + 273.15 = 423.15 K. Then, P2 = 726 * 423.15/283.15 = 1085.96 mm Hg. 2. You are given a clear solution of KNO3. Using 3 – 4 sentences (in your own word ...
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