The Health Education Systems, Inc (HESI) Admission Assessment (A2) exam is an examination used by nursing programs to evaluate your fit and potential success in a demanding nursing education environment.
The HESI A2 Chemistry Test consists of 30 questions related to the Atom; the Periodic Table; Scientific Notation, the Metric System, and Temperature; Chemical Equations; Chemical Reactions; Solutions; Acids and Bases; Oxidation-Reduction Reactions; Nuclear Chemistry; and Biochemistry. Below you will find additional information on each Chemistry subsection and HESI A2 Chemistry Practice Test.
Let’s get started with our free HESI A2 practice test to pass your real exam with a high score on your first attempt.
What’s on the HESI A2 Chemistry Section?
Scientific Notation, the Metric System, and Temperature
This subsection will require that you show your knowledge of scientific notation, metric prefixes and basic units of measurement, temperature, and SI units of measurement.
This subsection consists of questions related to the structure of the atom, including nuclei, protons, electrons, electron clouds, ions, atomic radius, and other related terms and concepts.
The Periodic Table
This subsection consists of questions related to element grouping on the periodic table, as well as atomic radii, atomic weight, electron affinity, electronegativity, and other related concepts and terms.
This subsection consists of questions related to chemical equations, including products, reactants, coefficients, as well as balanced and unbalanced equations, along with other related concepts and terms.
This subsection contains questions related to molarity, percent concentrations, Avogadro’s number, common solutions, and their properties, solutes, polar and nonpolar solvents, and the effects of pressure and temperature on solubility, along with other related concepts and terms.
The questions in this subsection cover the rates and catalysts of chemical reactions, as well as the effects of temperature on reaction rate, single versus double substitution reactions, combination and decomposition reactions, and covalent and ionic bonding, among other related concepts and terms.
This subsection contains questions related to metathesis reactions, oxidizing and reducing agents, single replacement reactions, as well as oxidation number, and state, among other related concepts and terms.
Acids and Bases
This subsection contains questions related to weak and strong acids and bases, superbases, superacids, and the potential of hydrogen (pH), among other related terms and concepts.
This subsection contains questions related to nuclear force, isotopes, radioactive half-life, radioisotopes, radioactivity, and radioactive decay, as well as gamma, alpha, and rays, beta among other related terms and concepts.
This subsection consists of questions related to carbohydrates, including proton motive force, glycolysis, the Embden-Meyerhof pathway, condensation reaction, proteins, amino acids, peptides, nucleic acids, and lipids among other related terms and concepts.
Read more>>> HESI A2 Chemistry Study Guide
HESI A2 Chemistry Practice Test
The following are some HESI A2 Chemistry practice test questions and answers. Check them out!
1. An unknown element has a mass number of 33 and an atomic number of 12. How many neutrons does the element contain?
2. BF3 is also known as ____.
A. boron tetrafluoride
B. boron trifluoride
C. boron monofluoride
D. tri-boron monofluoride
3. What is the metric prefix meaning one-billionth?
4. Which of the following describes a non-polar covalent bond?
A. An even sharing of electrons between atoms
B. An even sharing of protons between atoms
C. An uneven sharing of electrons between atoms
D. An uneven sharing of protons between atoms
5. Which of the following is the correct description of stoichiometry?
A. Stoichiometry describes the chemical reactions between the elements of a compound.
B. Stoichiometry is the calculation of relative quantities of reactants and products in chemical reactions.
C. Stoichiometry describes the color flares expected based on the participants of a chemical reaction.
D. Stoichiometry describes the fundamental properties of atoms universally.
Answer & Explanation
1. Answer: A
Explanation: The mass number of an atom provides the total number of neutrons and protons in the atom. Electrons, which are incredibly light, do not significantly contribute to the overall mass of an atom; recalling this fact can make it easier to remember the meaning of the mass number.
An atom’s atomic number represents the total number of protons in the atom.
The number of neutrons can then be found by calculating the difference between the mass number and the atomic number: 33−12=21
2. Answer: B
Explanation: “B” is representative of boron in the periodic table, and “F” stands for fluorine. Anions of the element fluorine are called fluorides. The “3” behind the “F” changes the prefix to “tri,” making the correct answer “boron trifluoride.”
3. Answer: A
The common metric prefixes for numbers less than 1 are as follows:
deci = tenth
centi = hundredth
milli = thousandth
micro = millionth
nano = billionth
pico = trillionth
4. Answer: A
Explanation: In a non-polar covalent bond, electrons are shared evenly between the atoms in the molecule. This means that the overall molecule does not have a dipole.
In a polar covalent bond, electrons are shared unevenly between atoms because one atom is more electronegative than the other.
5. Answer: B
Explanation: Stoichiometry deals with calculations of the masses of reactants and products involved in a chemical reaction. Stoichiometry is a mathematical part of chemistry.
Study with our FREE HESI Chemistry Practice Test
You must perform well on the HESI A2 in order to get accepted into nursing school. How can you study as effectively as possible for this critical exam? You should use a variety of study resources and take the HESI A2 practice exam to ensure that you are well prepared for the exam.
Passemall offers free resources to assist you with this task. A free Chemistry HESI A2 practice test will evaluate your knowledge and skills and give you an estimate of your HESI A2 exam readiness. A practice exam will also show any areas that require additional investigation and comprehension. To make the greatest use of your time, take the HESI A2 practice test for the first time and mark which of the following claims is true next to each question.
By asking yourself these questions, you will be able to determine your areas of strength and weakness, allowing you to focus your study time on the areas that require the most improvement.
Obviously, the questions you answered correctly did not necessitate lengthy research; however, you should go over this information again to verify that you have a thorough understanding of the subject. To put it another way, you must understand why it is the correct response. You’ll need to devote extra time and attention to the questions that you answered correctly but were dubious about. Perhaps you merely have a basic understanding of the question’s subject.
Read more: How is the HESI A2 exam scored
Don’t wait any longer! Start studying for your HESI exam right now by taking our HESI A2 Chemistry practice test to get familiarized with the format and chemistry test questions of the actual test! We hope that by using our guidance, you will be able to increase your chances of passing your actual test with a good score on the first try.
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