Ap04_sg_b_chem - AP Chemistry 2004 Scoring Guidelines Form B The materials included in these files are intended for noncommercial use by AP

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AP ® Chemistry 2004 Scoring Guidelines Form B The College Board is a not-for-profit membership association whose mission is to connect students to college success and opportunity. Founded in 1900, the association is composed of more than 4,500 schools, colleges, universities, and other educational organizations. Each year, the College Board serves over three million students and their parents, 23,000 high schools, and 3,500 colleges through major programs and services in college admissions, guidance, assessment, financial aid, enrollment, and teaching and learning. Among its best-known programs are the SAT ® , the PSAT/NMSQT ® , and the Advanced Placement Program ® (AP ® ). The College Board is committed to the principles of excellence and equity, and that commitment is embodied in all of its programs, services, activities, and concerns. For further information, visit www.collegeboard.com Copyright © 2004 College Entrance Examination Board. All rights reserved. College Board, Advanced Placement Program, AP, AP Central, AP Vertical Teams, APCD, Pacesetter, Pre-AP, SAT, Student Search Service, and the acorn logo are registered trademarks of the College Entrance Examination Board. PSAT/NMSQT is a registered trademark of the College Entrance Examination Board and National Merit Scholarship Corporation. Educational Testing Service and ETS are registered trademarks of Educational Testing Service. Other products and services may be trademarks of their respective owners. For the College Board’s online home for AP professionals, visit AP Central at apcentral.collegeboard.com. The materials included in these files are intended for noncommercial use by AP teachers for course and exam preparation; permission for any other use must be sought from the Advanced Placement Program ® . Teachers may reproduce them, in whole or in part, in limited quantities, for face-to-face teaching purposes but may not mass distribute the materials, electronically or otherwise. This permission does not apply to any third-party copyrights contained herein. These materials and any copies made of them may not be resold, and the copyright notices must be retained as they appear here.
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AP ® CHEMISTRY 2004 SCORING GUIDELINES (Form B) Copyright © 2004 by College Entrance Examination Board. All rights reserved. Visit apcentral.collegeboard.com (for AP professionals) and www.collegeboard.com/apstudents (for AP students and parents). 2 Question 1 N 2 ( g ) + 3 H 2 ( g ) 2 NH 3 ( g ) 1. For the reaction represented above, the value of the equilibrium constant, K p , is 3.1 × 10 –4 at 700. K. (a) Write the expression for the equilibrium constant, K p , for the reaction. K p = 3 22 2 NH 3 NH p pp × 1 point for pressure expression 1 point for correct substitution (b) Assume that the initial partial pressures of the gases are as follows: p N 2 = 0.411 atm, p H 2 = 0.903 atm, and p NH 3 = 0.224 atm.
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This note was uploaded on 05/05/2011 for the course CHEM 504 taught by Professor John during the Fall '11 term at American College of Computer & Information Sciences.

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Ap04_sg_b_chem - AP Chemistry 2004 Scoring Guidelines Form B The materials included in these files are intended for noncommercial use by AP

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