HESI A2 ENTRANCE CHEMISTRY 2023

 HESI A2 ENTRANCE EXAM FOR  CHAMBERLAIN COLLGE OF NURSING  2023 QUESTIONS WITH ANSWERS  CHEMISTRY HESI A2 CHEMISTRY V1/V2 FILE 1. If a Hydrogen is in a compound, what would its oxidation number be? +1 2. What is the oxidation number of any simple ion? +1 or -1 depending on the charge of the ion 3. How many kilograms are in a pound? 0. 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? 0°C = 32°F 6. What is the oxidation number of an element atom? 0 7. What is the freezing point of sea water in Fahrenheit? 0°F 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 13. How many neutrons does carbon 14 have? 8 ( mass# - atomics # = neutrons) 14 - 6 = 8 14. How many protons does Potassium have? 19 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? 212°F 20. 0°K is equal to °C? -273°C 21. The term Amphoteric means? A substance that can act as both a base & acid 22. What is Kelvin based around? Absolute zero 23. A compound that is a Hydrogen or proton donor, corrosive to metals, causes blue litmus paper to become red and becomes less acidic when mixed with a base is? Acid 24. Mixture of 2 or more metals are? Alloys 25. Acids: 33. Atomic #: # of protons in nucleus of an atom 34. Base?  A Hydrogen or proton ACCEPTOR & has hydroxide group in the makeup of the molecule pH less than 7.0 sour/tart Formulas begin with H (Hydrogen) Proton Donor 26. 3 types of radiation in nuclear chemistry? Alpha, Beta & Gamma 27. Alpha radiation: * Emission of Helium (He) ions in the nuclei * Contains 2 protons & 2 neutrons. * +2 Charge * Largest radiation particle. * Can be stopped by piece of paper 00. Type of Alloy in which another metal is dissolved in Mercury (Hg)? Amalgam 28. Proteins are made up of? Amino Acids 29. Glycogen is what kind of starch? Animal Starch 30. When a electron gains one or more electrons? Anions 31. Basic building block of a molecule? Atom (NOT CELL!!) 32. Atomic mass? Average mass of a elements isotope  Produce -OH  Bitter, slippery, conduct electricity, formulas contain -OH  pH value greater than 7.0  Proton acceptor 35. Key note: Acids are Proton donors as Bases are proton acceptors 36. Beta radiation:  Decomposition product of a proton or neutron  High speed/energy Electrons  EITHER - charged electrons or + charged positrons  Can be stopped by aluminum foil 37. What is Biochemistry? Study ofsubstances & processes occurring in living things 38. Fahrenheit is based off of? Body temperature 39. How does ↑ Surface area speed up chemical reactions? By ↑ areas of contact where chemical reactions can occur 40. How do catalyst accelerate a chemical reaction? By reducing the amount of energy needed for a reaction to occur 41. What does COOH symbolize? A Carboxyl group 42. Which of the following is not a solution type? Catalyst 43. Define Catalyst. Substance that speeds up a chemical reaction. 44. What is an atom called when it LOSES 1 or more electrons? Cations 45. What is chemical bonding? The joining of atoms to form new substances. 2 types: ionic & covalent bonding 46. What is a Ionic bond?  Electrical attraction between 2 oppositely charged atoms groups of atoms called ions  (between metals & nonmetals) 47. Ionic bonding? Chemical bond that’sformed when an atom transfers a electron to another atom. (steals) 48. Single Covalent bond?  Chemical bond that shares 1 electron pair  Formed by non-metals 49. What are chemical reactions? Making & breaking of chemical bonds, leading to changes in composition of matter 50. Double Covalent bond? When 2 electron pairs are share