HESI A2 Chemistry
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ExploreAbout this exam
The HESI A2 Chemistry test is one of the subject-area modules in the HESI Admission Assessment (A2), a battery of tests that many nursing and health-science programs in the United States use as part of their admissions review. Candidates are typically prospective nursing students, transfer applicants, or pre-nursing students who must demonstrate readiness in core science before enrolling in a program's science sequence. The chemistry module is delivered in multiple-choice format and is usually taken alongside other A2 subjects such as biology, anatomy and physiology, mathematics, reading comprehension, vocabulary, and grammar. Because individual schools choose which modules to require and how to weight them, the chemistry content you see will generally stay within introductory, first-semester general chemistry: classifying matter and its properties, measurement and significant figures, atomic structure and electron configuration, periodic trends, ionic and covalent bonding, formula writing and nomenclature, balancing equations, mole and stoichiometry calculations, and solution concentration. Preparation should be active rather than passive: work through a standard introductory chemistry textbook or open courseware, then drill calculation types (molar mass, limiting reactant, dilution, molarity) until they are automatic, and finish with timed practice sets that mimic the multiple-choice pacing. Confirm the exact module requirements, scoring expectations, and testing logistics directly with your target program, since those details are set by the school rather than by a single national standard. This page is independent study material and is not affiliated with, endorsed by, or sponsored by the exam publisher or any testing vendor; always verify current requirements with your program and the official testing provider before you register.
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About HESI A2 Chemistry preparation
What is the HESI A2 Chemistry test used for?
It is a subject module within the HESI Admission Assessment used by many nursing and health-science programs as one data point in admissions decisions. Your target school decides whether chemistry is required, whether a minimum score applies, and how the result is weighted against your GPA and other modules.
What is the format of the chemistry module?
It is delivered as multiple-choice questions, typically completed on a computer at a testing center or through remote proctoring. Expect straightforward calculation and recall items rather than essays or lab practicals. Check your program's current instructions for delivery mode, permitted scratch paper, and calculator policy before test day.
How difficult is the chemistry section?
Difficulty is roughly introductory college chemistry: no organic synthesis, no quantum mechanics. Most misses come from unit conversion, significant figures, and stoichiometry setup rather than obscure facts. If you can confidently balance equations and convert grams to moles to molarity, you are already handling the highest-yield material.
Can I retake the exam if my chemistry score is low?
Retake rules are set by the individual school or testing site, not by a universal policy. Many programs impose a waiting period or a limit on attempts, and some average your scores. Ask your admissions office in writing how many attempts are allowed and how repeat scores are treated before you schedule a retake.
How should I order my studying?
Start with matter, measurement, and significant figures, since every later calculation depends on them. Then move to atomic structure and periodic trends, followed by bonding and nomenclature, and finish with reactions, stoichiometry, and solutions. End with mixed timed sets so you practice switching between topics under pressure.
What are the most common mistakes candidates make?
Skipping dimensional analysis, misreading whether a question asks for mass or moles, forgetting to balance an equation before using mole ratios, confusing molarity with moles, and ignoring significant figures. Candidates also lose points by not knowing polyatomic ion names and charges, which slows formula writing and nomenclature questions.
How much time should I allow for preparation?
That depends on your background. If your last chemistry course was years ago, plan several weeks of consistent review with practice problems several times a week. If you recently finished general chemistry, a shorter refresher focused on calculation speed and nomenclature is usually enough. Build in at least two full timed practice sessions.
Where can I confirm current test details and fees?
Only your target program and the official testing provider can confirm current registration fees, test length, score reporting, and accepted scores. Published figures change, so verify directly rather than relying on forums or older prep books. This page is independent study material and makes no claim of official affiliation.