The HESI Chemistry test consists of 25 multiple choice questions which must be answered within 25 minutes. Many nursing schools do not require the chemistry test, so be sure to check with your school for their requirements. The topics covered include atomic structure, chemical equations, chemical reactions, and biochemistry. Our free HESI A2 Chemistry practice test will help ensure that you are fully prepared.
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Question 1 of 25
1. Question
Sterling silver contains 92.5% silver and 7.5% copper by weight. Which term applies to sterling silver?
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Question 2 of 25
2. Question
Which of the following provides an example of a double replacement reaction?
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Question 3 of 25
3. Question
What is the correct order of decreasing bond strength?
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Question 4 of 25
4. Question
Which Kelvin temperature most closely corresponds to human body temperature?
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Question 5 of 25
5. Question
Cholesterol is an example of which class of compounds?
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Question 6 of 25
6. Question
Radioactive iodine-131 has a half-life of 8.06 days and decays via beta-particle emission to afford stable 131Xe. How many half-lives is/are required for 75% decay of iodine-131?
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Question 7 of 25
7. Question
Which statement correctly describes a structural difference between DNA and RNA?
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Question 8 of 25
8. Question
Which gas possesses the lowest density at standard temperature (25 °C) and pressure (1 atm)? (Refer to the periodic table)
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Question 9 of 25
9. Question
The composition of which of the following nuclei represents an ion with net charge (−1) and mass number 37?
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Question 10 of 25
10. Question
Which one of the following is not involved in RNA base-pairing?
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Question 11 of 25
11. Question
Which of the following constitutes one of the DNA base pairs that joins the two DNA chains?
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Question 12 of 25
12. Question
Which element is not present in monosaccharides?
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Question 13 of 25
13. Question
Consider the following reaction: C3H8+ 5 O2 → 3 CO2 + 4 H2O. How many moles of CO2 will be formed from 3 moles of propane?
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Question 14 of 25
14. Question
A one molar solution of NaCl contains 58.4 grams of solute in one liter of water. How much NaCl is present in 10 mL of this solution?
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Question 15 of 25
15. Question
Potassium chloride is an ionic compound composed of K+ and Cl− ions. How many electrons are present in the K+ valence shell? (Refer to the periodic table)
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Question 16 of 25
16. Question
A prime number is a whole number greater than 1 that is not a product of two smaller numbers. Which of the following is not a prime number?
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Question 17 of 25
17. Question
Which monosaccharide is one of the components in both sucrose and lactose (disaccharides)?
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Question 18 of 25
18. Question
Which of the following functions as a catalyst in human metabolism?
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Question 19 of 25
19. Question
Which statement does not accurately describe an equilibrium reaction?
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Question 20 of 25
20. Question
How many nanometers are there in one millimeter?
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Question 21 of 25
21. Question
What is the product of (4 x 103) multiplied by (6 x 10−2)?
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Question 22 of 25
22. Question
How many amino acids are required by humans to biosynthesize proteins from metabolic intermediates?
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Question 23 of 25
23. Question
The elements F, Cl and Br contain the same number of:
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Question 24 of 25
24. Question
In the forward reaction Mg + CuCl2 → MgCl2 + Cu, electrons are transferred:
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Question 25 of 25
25. Question
Which of the following corresponds to the conjugate base of H3PO4?
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