Chemistry Gre Questions

[Kipa Crawn]

Whilethe commenter didn't explicitly say that the question was off-topic for not being about chemistry, and should not have been asked at this site on that basis, that was the implication I read into it.

While for me the ideal gas law and related laws were always covered as part of the chemistry curriculum, I realize that there may be regional variation and a difference in opinion on this topic, hence my question to make it official:

With this particular question, however, I have some issues. Mainly this is because it is a wall of text and it asks us to watch a YouTube video for referral, which can disappear at any given moment. But that's a different story. When asked in a more external-link-free fashion, I think it is a good fit for our site.

AP Exams are regularly updated to align with best practices in college-level learning. Not all free-response questions on this page reflect the current exam, but the question types and the topics are similar, making them a valuable resource for teachers and students.

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The Chemistry exam covers material that is usually taught in a one-year college course in general chemistry. Understanding of the structure and states of matter, reaction types, equations and stoichiometry, equilibrium, kinetics, thermodynamics, and descriptive and experimental chemistry is required, as is the ability to interpret and apply this material to new and unfamiliar problems. During this exam, an online scientific calculator function and a periodic table are available as part of the testing software.

To use the calculator during the exam, students need to select the Calculator icon. Information about how to use the calculator is available in the Help icon under the Calculator tab. Students are expected to know how and when to make appropriate use of the calculator.

Visit ETS to learn more and to practice using the scientific calculator.. Students will find the online scientific calculator helpful in performing calculations (e.g., arithmetic, exponents, roots, and logarithms).

Some questions are based on laboratory experiments widely performed in general chemistry and ask about the equipment used, observations made, calculations performed, and interpretation of the results. The questions are designed to provide a measure of understanding of the basic tools of chemistry and their applications to simple chemical systems.

Note: Each institution reserves the right to set its own credit-granting policy, which may differ from the American Council on Education (ACE). Contact your college to find out the score required for credit and the number of credit hours granted.

Aktiv Chemistry is a comprehensive online homework platform that helps students build mastery of chemistry. Take advantage of over 15,000 built-in chemistry problems, scaffolded practice, a powerful instructor dashboard, LMS grade syncing, and much more.

Building engaging classroom activities has never been easier. Aktiv Chemistry provides an extensive library of questions for chemistry courses such as General Chemistry, Introductory Chemistry, GOB Chemistry, Organic Chemistry. The content library includes discipline-specific problem types such as molecule drawing, chemical equations and naming, dimensional analysis, numerical entry, and more.

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One of our Learning Specialists will give you a tour of the Aktiv Chemistry or Aktiv Mathematics learning platforms and provide a free instructor playground account with access to the content library.

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While in femtochemistry control is exerted at time scales where the structural rearrangement dominates the molecular dynamics, in attochemistry the goal is to control the outcomes of a chemical reaction by acting at the electron time scale.

Water plays a vital role in living systems as it constitutes a significant component, exerting control over the organization, durability, dynamics, and functionality of various biological processes. The comprehension of the interaction of water with biomolecules is crucial for unlocking their functions, a prerequisite for numerous applications ranging from drug development to the effective synthesis of complex macromolecules like proteins. Furthermore, most chemistry experiments in the lab are performed in solution. Within this framework, an intriguing question arises: how do electronic mechanisms, such as charge migration, potentially respond to the presence of a solvent environment? Solvation profoundly influences the electronic structure of molecules, and when water is present, it can form new hydrogen bonds with the solvated molecule, acting both as a donor and acceptor of these bonds.

Attosecond time-resolved experiments have traditionally been confined to the study of isolated molecules, i.e. in the gas phase. However, recent advancements have witnessed a significant technological endeavor to expand these techniques to investigate pure liquid water and water clusters. Particularly, the measurement of attosecond time-resolved photoemission delays from size-resolved water clusters has shed light on the relationship between orbital localization and time delays. This groundbreaking research has confirmed that solvation strongly influences the electronic structure of water molecules20. While experimental investigations regarding charge migration in solvated molecules are yet to be conducted, theoretical studies employing time-dependent density functional theory (TDDFT) have already made notable advancements21,22. These studies suggest that solvation introduces additional pathways for charge migration through water molecules. In particular, theoretical studies have addressed hole migration subsequent to the ionization of uracil21 and synthetic peptides22. For the latter, computational analyses demonstrate that linear ureidopeptides exhibit variations not only in the electronic structure but also in the excitation-induced charge and in the hole migration following ionization, contingent upon the positioning of water molecules at either the amino or carboxylate ends or along the alkyl bridge. These findings offer intriguing prospects and offer a clear path to experimental investigations aimed at substantiating the effects of solvation in ultrafast electronic mechanisms like charge migration.

The last decade has witnessed the advent and initial breakthroughs of attochemistry, a discipline that has emerged from the extension of the tools and concepts of attosecond science to investigate problems of chemical interest. Attochemistry allows for real-time imaging of electron dynamics in molecules and, therefore, can potentially be used to exert control of electronic motion. Current efforts focus on improving the available imaging procedures, e.g., by combining the existing tools with XFEL pulses or STM, and on adapting the developed approaches to problems of widespread interest in chemistry, like charge transfer induced by VIS and UV light in neutral molecules, either in the gas phase or in solution. All these are guided by theoretical modelling, which has been an essential ingredient since the very beginning of this discipline and will remain so in the near future. Attochemistry is still at its infancy, but its long-term goal, achieving control of chemical processes by acting on electronic motion at its natural time scale, does not seem to be just a remote possibility anymore.

This is a list of unsolved problems in chemistry. Problems in chemistry are considered unsolved when an expert in the field considers it unsolved or when several experts in the field disagree about a solution to a problem.

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Try these quizzes based on GCSE chemistry past papers. By working your way through the chemistry questions created by experts, you can prepare for your chemistry exams and make your revision more interesting.

There are ten exam-style GCSE chemistry questions based on past papers, covering topics including early ideas about atoms, alloys and properties of fractions. This activity should take you around 5-10 minutes to complete.

There are ten exam-style GCSE chemistry questions covering topics including group 1 elements, reversible reactions and dot and cross diagrams. This activity should take you around 5-10 minutes to complete.

There are ten exam-style GCSE chemistry questions based on past papers. This quiz covers topics including graphene and fullerenes, extraction methods and potable water. This activity should take you around 5-10 minutes to complete.

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