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HESI Exam Questions: Chemistry
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HESI Exam Questions: Chemistry
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25 Questions

1. Which element might you encounter in nature in its pure form?
2. Name the reaction shown.
8Fe + S8 → 8FeS
3. The energy required to remove the outermost electron from an atom is called _____.
4. Which is a property of an ionic compound?
5. How do organic reactions compare to inorganic reactions?
6. Why is salt often used on icy roads?
7. The difference between hydrochloric acid and hydrosulfuric acid is _____.
8. If a neutral sodium atom has one electron removed, what is the result?
9. What is the charge of an alpha ray?
10. Blood with a pH of 1.3 indicates what about the blood sample?
11. In the periodic table of elements, which are the periods?
12. When a metallic atom combines with a nonmetallic atom, what typically happens to the metallic atom?
13. What is the product of combustion of a hydrocarbon in excess oxygen?
14. Which solution would change red litmus paper to blue?
15. How many neutrons are in an atom of carbon-12?
16. What is the correct formula for sodium nitrate?
17. What is a cation?
18. What is the oxidation state of the chlorine atom in the compound HCl?
19. Among the following elements, which is a nonmetal?
20. Which pair are isotopes?
21. What is the coefficient of O2 after the following equation is balanced?
__CH4 + __O2 →__CO2 +__H2O
22. Which of these elements is a liquid at room temperature?
23. If gas A has four times the molar mass of gas B, you would expect it to diffuse through a plug _____.
24. Why does fluorine have a higher ionization energy than oxygen?
25. What is the correct name of AgNO3?

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