Hardest ap chem questions

The College Board has free-response questions (along with scoring guidelines) from past tests (1999 to 2013) on its site for AP Chemistry. You can also find free-response questions from 2014 to 2020 and 2021 on the AP Student section of the College Board website.

Hardest ap chem questions. šŸŽ„ Watch AP Chemistry teacher Wes Winter review the different types of reactions, including oxidation-reduction reactions. Key Terms to Review (33) Acidic Solution: An acidic solution is a water-based liquid that has a pH level less than 7. It's characterized by an excess of hydrogen ions (H+).

The AP Chemistry Exam, like many of the other AP exams, is composed of two sections. The multiple choice section and the free response section. The multiple choice section is 1 hour and 30 minutes long, 60 questions with 4 choices each, and is worth 50% of your total score. You will not be allowed a calculator for this portion of the exam.

Mark an ā€œNā€ next to the questions that you donā€™t have any idea how to work. Force yourself to move through 15 questions each 10 minutes and the full 60 questions in 40 minutes. Now make a second pass concentrating on the ā€œYā€ questions only. Do not spend any time on the ā€œNā€ questions.In the previous post, we talked about the Hessā€™s law and how it can be used for measuring the enthalpy change (Ī”H) for a reaction without making calorimetric measurements.. In short, the Hessā€™s law is based on the fact that enthalpy is a state function, and therefore, Ī”H rxn is the same whether the reaction takes place in one step or in a series of steps.Directions: Questions 1-3 are long free-response questions that require about 23 minutes each to answer and are worth 10 points each. Questions 4-7 are short free-response questions that require about 9 minutes each to answer and are worth 4 points each. For each question, show your work for each part in the space provided after that part.Use the following AP® Chemistry tips in answering the multiple-choice questions: 1. Manage your time. The best way to do this is to mark and skip difficult questions as you move through the test. Answer easy questions for guaranteed points, then return to your marked questions at the end. 2.The AP Environmental Science exam is scored from 1-5. A 3 or higher is a passing score. The multiple-choice section accounts for 60% of the overall score, while the free-response questions in section two account for 40% of the overall score. Students should keep the score breakdown in mind and play to their strengths.

Hardest: I think the general consensus here is that Acids and Bases is the hardest unit. I agree. (Question 1 on last year's FRQ anyone?) Titration curves really sucked. pH/pOH/pKa/pKb/pKw always became confusing. I never learned how to use H-H correctly, so I would always write out ICE tables (foolproof though).Conceptual Questions. Acids, Bases, and Conjugates, Miscellaneous 1. In the BrĆønsted-Lowry definition of acids and bases, an acid _____ a. is a proton donor. d. breaks stable hydrogen bonds. b. is a proton acceptor. e. corrodes metals. c. forms stable hydrogen bonds. 2. In the BrĆønsted-Lowry definition of acids and bases, a base _____ a.We would like to show you a description here but the site won't allow us.Correct answer: r = k [A] [B]2. Explanation: When the concentration of A stays the same but the concentration of B doubles, the rate quadruples, showing a second order rate law based on B. When the concentration of A doubles and B stays the same, the rate also doubles, showing a first order rate law based on A.so I came up with a list of units ranked easiest to hardest. let me know what you guys think and what units you thought were the easiest and hardest too. U7 Kinetics. already covered most of it in honors chem, so all that was new was just integrated rate law and the slow step stuff. U2 Molecular and ionic compound structure.Correct Answer: A. Endothermic reactions have the heat on the left side and a positive Ī”H. Reactions with an increase in entropy also have a positive Ī”S. Because the reaction in choice (A) produces two moles of gas for each mole of solid, it would have a positive Ī”S. AP Chemistry Free Practice Question #4. 2N2O5 (g) ā†’ 2N2 (g) + 5O2 (g)

Calculate the value of Kp at 700. K for each of the reactions represented below. NH4HS(g) x NH3(g) + H2S(g) 2 H2S(g) + N2(g) + 3 H2(g) x 2 NH4HS(g) Answer Key. Testname: CH_13_PRAC_TEST_EQUILIBRIUM.TST. MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. A.The AP chemistry exam is a two-part exam designed to take about three hours. The first section has 60 multiple-choice questions. You will have 90 minutes to complete this section. The second part of the exam is the free-response section. You will begin this section after you have completed and turned in your multiple-choice scan sheet.Our completely free AP Chemistry practice tests are the perfect way to brush up your skills. Take one of our many AP Chemistry practice tests for a run-through of commonly asked questions. You will receive incredibly detailed scoring results at the end of your AP Chemistry practice test to help you identify your strengths and weaknesses.The Ultimate Study Guide to APĀ® Chemistry. Preparing for APĀ® Chemistry can be incredibly stressful. From remembering how to balance reactions to keeping entropy and enthalpy straight, APĀ® Chemistry is one of the densest APĀ® subjects the College Board offers. Albert.io provides hundreds of APĀ® Chemistry practice questions to help you ...The AP chemistry exam is a two-part exam designed to take about three hours. The first section has 60 multiple-choice questions. You will have 90 minutes to complete this section. The second part of the exam is the free-response section. You will begin this section after you have completed and turned in your multiple-choice scan sheet.

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Thermochemistry. That shit still makes no sense to me. I really did not like Acid/Base with the buffers, but I also found electrochemistry difficult as well. thermodynamics. I had a solid A in ap chem all year and then got a 54 on thermo. Buffers IMO. Stoichiometry by far lol.In conclusion, AP Chemistry is a challenging course that requires dedication, hard work, and strong analytical skills. The subject matter is complex and can be overwhelming, but with consistent practice and effective study strategies, students can master the material and succeed in the course. The pace of the course is demanding, and students ...Note: This document is not a complete practice exam. Rather, it is a compilation of questions from the 2013 AP Chemistry International Exam that support the learning objectives of the redesigned AP course. Questions that do not support this course have been removed. This publication may be used to help students prepare for the 2014 AP Chemistry exam and future exams. Following the last page of ...21.4%. The AP Chemistry exam is a tough one to master, though many students do well enough to pass (which typically means earning a score of 3 or higher). In 2019, 55.6% of students who took the AP Chemistry exam received a score of 3 or higher. Of these, only 11.5% of students received the top score of 5 with another 16.6% scoring a 4.Subject Guides. Learn about the AP Chemistry essentials. These are things that you should have memorized to succeed in AP Chemistry. We'll cover everything from nomenclature to energy to significant figures. With this review, you'll be more than ready to tackle AP Chemistry!

Practice Problems. Practice Problems. Answer the following questions and check your answers below. These problems are for practice only will not be graded. Be sure you know how to draw correct Lewis Dot Structures and are able to correctly predict the electronic arrangement and molecular geometry before going on to the lab assignment.ShortCalligrapher09. ā€¢. princeton reviewā€”i took ap chem sophomore year (last year) and princeton review helped the best. i got a 4 on the exam too using that book so i'd recommend princeton review! Reply. I'm taking ap chem next year and I plan to study over the summer and get a good hold on the concepts beforehand.These questions may rely on answers from other questions. 500 AP Chemistry Questions to Know by Test Day by. Table of Contents. About the Author. Introduction. Note from the Author. Chapter 1 Atomic Theory and Structure. Questions 1-50. Chapter 2 Chemical Bonding. Questions 51-90. Chapter 3 States of Matter. Questions 91-150. Chapter 4 ...The AP Chemistry Exam has a total of 67 questions. The exam is divided into two sections: Multiple-Choice and Free-Response. ... Despite being one of the hardest AP classes, AP Chemistry was still opted by 124,780 students in 2022 as it is one of the preferred AP courses of many competitive colleges/universities.MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1)B ID: chem9b 10.1-112 SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question. 2)In contrast to the assumptions used for ideal gases, real molecules and atoms have finite (not zero) volumes, and theyFeb 15, 2013 Ā· golfer78 February 20, 2013, 9:50pm 2. <p>I am currently taking AP Chemistry and the hardest part would be the workload and remembering to use significant figures.</p>. Darthpwner February 22, 2013, 12:50am 3. <p>Acids and Bases and Electrochemistry</p>. manrushi February 24, 2013, 7:12pm 4. Small Question Stems. In test-speak, the portion of a problem that comes before the answer choices is typically called the question stem. Stem length varies on the AP Chemistry exam from eight-word simple sentences to elaborate 50-word descriptions of hypothetical situations. Either way, while youā€™re reading the question stem, time is ticking ...17 Apr 2023 ... In this video, we'll unpack sample multiple-choice individual questions. Download questions here: https://tinyurl.com/2p94axru Stay ...This question is about the gaseous equilibrium between compounds E, F and G as shown in the equation. E (g) + 2F(g) 2G(g) Ī”H = -50 kJ mol-1 (a) A 2.0 mol sample of E was heated in a sealed container with a 1.0 mol sample of F. Equilibrium was established at a given temperature and the equilibriumOverview of the AP Macroeconomics Exam; 10 Hardest AP Macroeconomics Questions; Final Tips The AP Macroeconomics Exam is fairly tricky compared to other AP exams, with 63.3% of students receiving a score of 3 or higher in 2020 but only 19.7% of students receiving a 5. The exam requires students to complete difficult economics problems in a ...

In this video, a teacher works through a question that is widely regarded as the most difficult ever asked in an A-level Chemistry exam.The question is based...

There are two types of multiple-choice questions on the AP Chemistry Exam, discrete items and item sets. The discrete items are the typical stand-alone test questions in which four choices, A-D, are given from which the correct answer is to be selected. Item sets will have two or more test questions, each with four choices, A-D, based on a ...PRACTICE PROBLEMS ON NET IONIC EQUATIONS page 1 of 3 Show the complete ionic and net ionic forms of the following equations. If all species are spectator ions, please indicate that no reaction takes place. Note: you need to make sure the original equation is balanced before proceeding!A. At atmospheric pressure, helium can exist in all three phases, as well as a supercritical fluid phase near absolute zero. (Choice B) Solid and gaseous helium never exist in equilibrium with each other at any temperature or ā€¦AP Chemistry Free-Response Practice Test 22: Short Free-Response Questions; AP Chemistry Downloads. AP Chemistry: Basics Multiple-Choice Practice Questions; AP ā€¦The College Board has free-response questions (along with scoring guidelines) from past tests (1999 to 2013) on its site for AP Chemistry. You can also find free-response questions from 2014 to 2020 and 2021 on the AP Student section of the College Board website.Does video footage of Bigfoot exist? In a way, sure. These days, itā€™s less a question of whether or not thereā€™s video footage of Bigfoot ā€” itā€™s more about whether or not that very ...There are two types of multiple-choice questions on the AP Chemistry Exam, discrete items and item sets. The discrete items are the typical stand-alone test questions in which four choices, A-D, are given from which the correct answer is to be selected. Item sets will have two or more test questions, each with four choices, A-D, based on a ...The difference between tiers shows a large difference. Hardest: Physics C, AP Biology, AP Chem. 2nd: AB, BC (took AB first so BC is a breeze) 3rd: Lit, Stats, CS, Macro. Easiest: Lang, Micro, APUSH, US Gov. I self studied for AP World and Enviromental Science. If you want to include those, put them into the 4th tier. 4.The AP Chemistry test is considered one of the most difficult AP tests. In many years, up to half of students receive a failing score of 2 or lower! And, unfortunately, AP Chem hasn't gotten any easier. Luckily, there is a solution. Those who study effectively tend to do better on the testā€”no surprise there. So donā€™t be one of those people ...

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Varsity Tutors Diagnostic Tests. There are six diagnostic tests here with 50-60 questions each at varying difficulty levels. You'll also be timed as you take the tests so you can get a better sense of your pacing. Questions ā€¦Good morning, Quartz readers! Good morning, Quartz readers! A$AP Rocky awaits his verdict. The American rapper, whose real name is Rakim Meyers, was detained and charged with assau...Exam Format. As you know, the FRQ section on the AP Chem exam is 7 questions long (3 long, 4 short answer questions). You will have 1 hour and 45 minutes to complete the section. Your score on this section equates to 50% of your total exam score. Here is a clip of Dylan Black, a chemistry streamer, going over the format of the exam as a whole.Learn for free about math, art, computer programming, economics, physics, chemistry, biology, medicine, finance, history, and more. Khan Academy is a nonprofit with the mission of providing a free, world-class education for anyone, anywhere. ... APĀ®ļøŽ/College Chemistry. Course: APĀ®ļøŽ/College Chemistry > Unit 3. Lesson 2: Properties of ...These test all six skills that are taught in the course: argumentation, mathematical routines, models and representations, representing data and phenomena, model analysis, and question and method. Details: 3 long-answer questions, 10 points each. 4 short-answer questions, 4 points each. Worth 50% of total exam score.After overseeing franchises like 'World of Warcraft' and 'Candy Crush,' Activision COO Daniel Alegre will try to lead Yuga Labs into gaming. Activision Blizzard COO Daniel Alegre i...About This Edition. v. About This Edition. This edition of the . AP Chemistry Course and Exam Description. includes the following changes, which take effect in fall 2014:Last Updated On: March 1, 2022. Most science classes have a reputation for being difficult, and AP® Chemistry is no exception. A lot of students donā€™t even bother with ā€œIs AP® Chemistry Hard?ā€ and skip directly to ā€œHow Hard is AP® Chemistry?ā€.Q7. Justify the reaction: 2Cu2O (S) + Cu2S (s) ā†’ 6Cu (s) + SO2 (g) is a redox reaction. Identify the species oxidized, and reduced, which acts as an oxidant and which acts as a reductant. Answer. Copper is reduced from + 1 oxidation state to 0 oxidation state in this reaction, and sulphur is oxidised from ā€“ 2 to +4 state.Updated on July 03, 2019. The empirical formula of a compound represents the simplest whole-number ratio between the elements that make up the compound. This 10-question practice test deals with finding empirical formulas of chemical compounds. A periodic table will be required to complete this practice test.The AP Chemistry Exam has consistent question types, weighting, and scoring guidelines every year, so you and your students know what to expect on exam day. Starting with the 2023 exam, a scientific or graphing calculator is recommended for use on both sections of the exam. Section I: Multiple Choice. 60 Questions | 1 Hour 30 minutes | 50% of ...Overview. Question 4 involves the catalytic oxidation of elemental iron inside a small container of sand to produce Fe2O3. Part (a) asks for a calculation of the heat absorbed by the iron/catalyst/sand mixture given the change in temperature of the system (ENE-2.D, 5.F). In part (b), the student must calculate the mass of iron required to ... ā€¦.

6. AP Chemistry. This course covers the fundamental concepts of chemistry in the areas of states of matter, intermolecular forces, and reactions. This course is heavily focused on doing labs and the process of doing labs such as writing a pre lab and a lab report. Fast Facts About AP Chemistry Exam: Section 1: Multiple Choice. 60 Questions; 90 ...1. The chemical reaction between HCl (aq) and NH3 (aq) is represented above. A student combines equimolar amounts of HCl (aq) and NHā‚ƒ (aq), both solutions initially at 24Ā°C, in a coffee-cup calorimeter. The student observes that the mixture reaches a temperature of 28Ā°C.Choose 1 answer: (Choice A) c e l l e q e q. (Choice B) c e l l. (Choice C) (Choice D) Learn for free about math, art, computer programming, economics, physics, chemistry, biology, medicine, finance, history, and more. Khan Academy is a nonprofit with the mission of providing a free, world-class education for anyone, anywhere.Questions 1-3 are long free-response questions that require about 23 minutes each to answer and are worth 10 points each. Questions 4-7 are short free-response questions that require about 9 minutes each to answer and are worth 4 points each. For each question, show your work for each part in the space provided after that part.your dream score on test day! Study on your own schedule at an affordable price. Thousands of practice questions that mimic the real test. Answer explanations that help you learn and retain information. Full-length practice tests, score predictors, and ongoing progress monitoring. Plus, itā€™s all online and at your fingertips on any device.If you're include the AP Chemistry Exam, you'll like to know what difficult questions you shall expect. Click are our tips for getting a top score on your proctored. Provided you're taking the APPROVED Chemistry Assessment, you'll want in know about difficult questions you shoud expect. Right are our pointers required getting a summit ā€¦AP Chemistry Practice Questions Solids, Liquids and Gases Multiple Choice Identify the choice that best completes the statement or answers the question. ____ 1. Which of the following statements is false? a. Condensed states have much higher densities than gases. b. Molecules are very far apart in gases and closer together in liquids and solids.Updated on July 18, 2019. This collection of chemistry test questions is grouped according to subject. Each exam has answers supplied at the end. They provide a useful study tool for students. For instructors, they are a good resource for homework, quiz, or test questions, or practice for the AP Chemistry test . 01.2019 AP Ā® CHEMISTRY FREE-RESPONSE QUESTIONS . GO ON TO THE NEXT PAGE. -5-CHEMISTRY . Section II . Timeā€”1 hour and 45 minutes . 7 Questions . YOU MAY USE YOUR CALCULATOR FOR THIS SECTION. Directions: Questions 1ā€“3 are long free-response questions that require about 23 minutes each to answer and are worth 10 points each. Hardest ap chem questions, K = [NO2] [N2O4]1 2. Although the equilibrium constant expressions have a 2:1 ratio of concentration for the products to the concentration of the reactants for the same species involved to get the K value for a. We would need to square it to get the K value for b. 3. K ā€² = [NH3] [N2]1 2[H2]3 2., Cram for AP Chemistry Unit 1 ā€“ Topic 1.7 with study guides and practice quizzes to review Atomic radius, ... When you are given this type of question, just look for the huge jump in ionization energies. ... the periodic trends aren't too difficult to grasp since they follow the chronology of the periodic table. It was purposely made to group ..., AP Chemistry Exam . 2017-18 AP Exam Instructions. Students are not allowed to use calculators in Section I of the AP Chemistry Exam. However, students are permitted to use scientiic or graphing calculators to answer questions in Section II. Four-function calculators are also permitted for use in Section II, but are not recommended., Official Classroom Resources including pacing guide and short daily videos. Study Notes/Powerpoints. Chalkbored: Powerpoints, study notes and labs designed for grades 11-12. John Bergmann & Jeff Christopherson, Normal Community High School: Student guided notes. Megan Wong, Wong Chemistry: Exam review packets., <p>Our teacher told us this is the hardest AP Chem equation balance question heā€™s ever come across. He gave our whole class an hour to do with no success. I have the answer now, but would like to test CollegeConfidentialā€™s intelligence =). Lets seeee.</p> <p>Copper (I) sulfide plus hydrogen nitrate yields copper (II) nitrate plus copper (II) sulfate plus nitrogen dioxide plus water.</p> <p ..., 1. The chemical reaction between HCl (aq) and NH3 (aq) is represented above. A student combines equimolar amounts of HCl (aq) and NHā‚ƒ (aq), both solutions initially at 24Ā°C, in a coffee-cup calorimeter. The student observes that the mixture reaches a temperature of 28Ā°C., United States History, Biology, English Literature, Calculus BC, Physics C, and Chemistry are often named as the hardest AP classes and tests. These classes have large curriculums, tough tests, and conceptually difficult material. We put together this list based on personal experience, online chatter, passing rates, 5 rates, and looking at ..., This site has an excellent selection of over 900 free AP Chemistry mutiple choice questions. They are organized by unit so that you can review them all or just focus by topic. Science Geek Interactive Review. This is a huge collection of practice quizzes including chapter review questions and many tests on many specific topics. This is an ..., Are humans separate from chimps and other apes? Learn what separates us from chimps. Advertisement Human beings see themselves in everything. We establish emotional connections to ..., 3 May 2020 ... I take the 2017 AP Chemistry Free Response Section, demonstrating that knowing the material is not enough if you are half as prodigious as I ..., The AP Calculus BC Exam will have both paper and digital formats in 2021. The paper administration is held on May 4, 2021 and May 24, 2021: Section I: Multiple Choice, 50% of exam score. No calculator: 30 questions (60 minutes) Calculator: 15 questions (45 minutes) Section II: Free Response, 50% of exam score., AP Ā® Chemistry 2021 Scoring Commentary . Question 6 . Note: Student samples are quoted verbatim and may contain spelling and grammatical errors. Overview . Question 6 focuses upon two salts, CaSO. 4. and PbSO. 4. In part (a), the student must explain why neither compound conducts electricity in its solid state (SAP-5.B, 1.B)., D. The final temperature cannot be determined without knowing T 1 and T 2 . AP Chemistry equations and constants. Heat transfer equation: q = m c Ī” T. Heat transfer variables and constants: q = heat m = mass c = specific heat capacity T = temperature. Learn for free about math, art, computer programming, economics, physics, chemistry, biology ..., 12 Feb 2020 ... AP Chem - Unit 2 Review - Molecular & Ionic Compound Structure and Properites. Jeremy Krug · 33K views ; 9.3 Hybridization | General Chemistry., United States History, Biology, English Literature, Calculus BC, Physics C, and Chemistry are often named as the hardest AP classes and tests. These classes have large curriculums, tough tests, and conceptually difficult material. We put together this list based on personal experience, online chatter, passing rates, 5 rates, and looking at ..., so I came up with a list of units ranked easiest to hardest. let me know what you guys think and what units you thought were the easiest and hardest too. U7 Kinetics. already covered most of it in honors chem, so all that was new was just integrated rate law and the slow step stuff. U2 Molecular and ionic compound structure., The death of a loved one raises legal and financial questions, such as who receives money and other assets the deceased person leaves behind and whether taxes are due on those asse..., Interactive tutorials and question sets on various chemical principles. "The interactive tutorials engage students deeply, and the question sets are very good at identifying weakness in student learning." Science Geek - AP Chemistry. Self-directed student practice; PowerPoints, notes, reviews, and interactive quizzes for each AP Chemistry ..., Multiple-choice AP Chemistry questions are often chunked together. ... The AP Chemistry exam covers a challenging set of concepts that require skills in math, factual recall, and analytical thinking. It's also one of the longest AP tests, lasting three hours and 15 minutes total., When looking through AP exams with the highest pass rate, many students won't be entirely shocked to see that AP Chemistry is considered one of the hardest AP classes because of the academic rigor it entails. While only 29.5% of students score a 4/5 on the AP Chem exam, don't let that statistic intimidate you., Updated on July 03, 2019. The empirical formula of a compound represents the simplest whole-number ratio between the elements that make up the compound. This 10-question practice test deals with finding empirical formulas of chemical compounds. A periodic table will be required to complete this practice test., Sample Question 1 Time allotted: 25 minutes (plus 5 minutes to submit) Common additives to drinking water include elemental chlorine, chloride ions, and phosphate ions. Recently, reports of elevated lead levels in drinking water have been reported in cities with pipes that contain lead, Pb(s). When . Cl. 2 (aq) flows through a metal pipe ..., SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question. 17) ID: chem9b 6.1-90 MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 18) D ID: chem9b 6.1-95 19) E ID: chem9b 6.1-103 20) A ID: chem9b 6.1-105 21) A, Chapter-wise Important Questions for Class 11 Chemistry. Chapter 1: Some Basic Concepts of Chemistry. Chapter 2: Structure of Atom. Chapter 3: Classification of Elements and Periodicity in Properties. Chapter 4: Chemical Bonding and Molecular Structure. Chapter 5: States of Matter. Chapter 6: Thermodynamics., Learn AP Chemistry using videos, articles, and AP-aligned practice. Review the fundamentals of atomic structure, intermolecular forces and bonding, chemical reactions, kinetics, thermodynamics, and equilibrium., AP® Chemistry is a challenging, college-level class. The curve is designed to account for the difficulty of this course and to provide an accurate assessment of the test-takerā€™s skills and knowledge. ... Albert has hundreds of AP-aligned AP® Chemistry practice questions and free response questions for you to study as you prepare for your AP ..., AP Chemistry Course and Exam Topics. This is an outline of the chemistry topics covered by the AP ( Advanced Placement) Chemistry course and exam, as described by the College Board. The percentage given after the topic is the approximate percentage of multiple-choice questions on the AP Chemistry Exam about that topic., e. CO. 2 ____ 24. London forces exist . a. for all molecules. b. only for molecules with nonpolar bonds. c. only for molecules with polar bonds., chem - hardest class by a landslide. the other 2 classes were easy as hell, chem was the only one I felt like I actually had to try in. disclaimer though, I had an incredible teacher who did square root curve on exams (aka insanely generous curve, take the square root of your score and x10. a 64, for example, becomes an 80) which help keeps test grades up if that's something anyone was ..., Free AP Subjects Questions of the Day. AP Biology Question of the Day Begin. AP Chemistry Question of the Day Begin. AP English Literature Question of the Day Begin. AP Environmental Science Question of the Day Begin. AP European History Question of the Day Begin. AP Macroeconomics Question of the Day Begin., What is the hardest unit in AP Chemistry? Closed ā€¢ total votes ... Whoever's decision it was to make chem labs only 3 units is going to rot. ... r/ApplyingToCollege. r/ApplyingToCollege is the premier forum for college admissions questions, advice, and discussions, from college essays and scholarships to SAT/ACT test prep, career guidance ..., 10 points. calculated value: 0.00250 mol CH 3 NH 3 Cl Ɨ 67.52 g. 1 mol. = 0.169 g. (b) For a correct description of step 1: Accept one of the following: Use the spatula, balance, and weighing paper to measure out exactly 0.169 g of CH 3 NH 3 Cl( s ) . Use the balance to weigh out the mass of solid in part (a)., AP Chemistry Past Exam Questions. Free-Response Questions. Download free-response questions from past exams along with scoring guidelines, sample responses ā€¦