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A practice exam for chapters 1-3 of a chemistry course, consisting of multiple choice and short answer questions. Topics covered include atomic structure, formulas and balancing equations, and molar masses. Students are required to identify the correct answer for multiple choice questions and provide reasoning and calculations for short answer questions.
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CH 221 Chapters 1- Practice EXAM I (chapters 1, 2,3)
Part I. Multiple Choice. Choose the single best response to each question, and put the letter identifying that response in the blank numbered the same as the question. If you choose a "none of these" response for a question with a numerical answer, you must write your answer in the answer blank. Five (5) points each, fifty (50) points total.
1 atm = 1.01325 x 10^5 Pa = 760 torr If a gas cylinder has a pressure of 542 atm, it could be recorded as A. 0.713 torr B. 4.12 x 10^5 torr C. 5.49 x 10-7^ Pa D. 5.35 x 10-3^ Pa E. none of these
A. 15 electrons B. 18 electrons C. 19 electrons D. 20 electrons E. none of these
iron(III) oxide_____________________ nitrogen trifluoride _____________________ nitric acid _____________________ NaHCO 3 ______________________ SnS_______________________ P 2 O 5 ________________________
Suppose 4.20 g H 2 react with 24.0 g O 2.
a) What is the limiting reagent (reactant)? (8 points)
b) What mass of H 2 O will be produced? (6 points)