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

1. Among the following elements, which is a nonmetal?
2. What is the coefficient of O2 after the following equation is balanced?
__CH4 + __O2 →__CO2 +__H2O
3. Name the reaction shown.
8Fe + S8 → 8FeS
4. Which compound contains a polar covalent bond?
5. Which element might you encounter in nature in its pure form?
6. If you leave a metal rake outside and it rusts, what reaction has taken place?
7. What is the correct electron configuration for magnesium?
8. Which two halogens are gases at room temperature?
9. If 58.5 g of NaCl (1 mole of NaCl) are dissolved in enough water to make 0.500 L of solution, what is the molarity of the solution?
10. What is the oxidation state of the chlorine atom in the compound HCl?
11. Which compound is represented by this structure?
12. Which is a triatomic allotrope of oxygen?
13. Which have about the same mass?
14. Which pair are isotopes?
15. If a neutral sodium atom has one electron removed, what is the result?
16. What is the correct name of AgNO3?
17. Which solution would change red litmus paper to blue?
18. Balance this equation: Zn + HCl → ZnCl2 + H2
19. How do organic reactions compare to inorganic reactions?
20. Which material would you expect to have the highest melting point?
21. What is the name of the compound CH3-CH2-CH2-CH3?
22. What is a cation?
23. Which element would you expect to be least reactive?
24. Which process has the greatest overall effect on solubility?
25. B, Si, As, Te, At, Ge, and Sb form a staircase pattern on the right side of the periodic table. How can these elements be classified?

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