HESI A2 CHEMISTRY 2026 V1 | V2

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HESI A2 CHEMISTRY V1/V2 Questions and Answers for 2025 Exam

If Hydrogen is in a compound, what would its oxidation number be? +1

2. What is the oxidation number of any simple ion? The same as the charge of the ion

3. How many kilograms are in a pound? 0.453592 kg

4. What is the temperature for freezing point of water in Celsius? 0 degrees Celsius (32°F for Fahrenheit) 5. What is the conversion of Celsius to Fahrenheit? 5F=9C+160 (remember 5F because you have 5 fingers on a hand & 9C because cats have 9 lives)

6. What is the oxidation number of an element atom? 0 7. What is the freezing point of sea water in Fahrenheit? Below 0C (pick and answer choice around -2C, actual temp depends on how much salt is in the water)

8. How many amino acids are in a dipeptide? 2

9. If Oxygen is in a compound, what would its oxidation number be? -2

10. Which of the following pH values would lemon juice likely have? 2 because the lower the pH value, the more acidic

11. What is a pentose? A 5 carbon sugar (Pent = 5) (ose = sugar)

12. What is the oxidation state of the Sulfur atom in Sulfuric Acid H2SO4? 6 (each H is +1, each O is -2. All charges have to add to 0. 2+S-8=0, so S=6)

13. How many neutrons does carbon 14 have? 8 ( mass# - atomics # = neutrons) 14 - 6 = 8

14. How many protons does Potassium have?

19 (same as the atomic number) 15. How many amino acids are essential for human life? 20 amino acids 16. Normal body temperature in °C? 37°C 17. Normal body temperature in °F? 98.6°F

18. Boiling point of water in °C? 100°C

19. Boiling point of water in °F?

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