HESI A2: Chemistry (Quiz 4) Welcome to your HESI A2 Practice Quizzes. Note: We designed FIVE (5) sets of practice quizzes for this Domain. Each set has 30 questions. Domain 4 (quiz 4): Chemistry. (30 questions) Please click NEXT to start your Free HESI Practice Quizzes right away. Best of Luck! 1. What is 6.5 × 10^-5 equal to in standard form? 0.0065 650,000 0.000065 0.00065 None 2. What is 85oC in degrees Fahrenheit. 23 °F 54 °F 155 °F 185 °F None 3. Which metric prefix is represented numerically by 10^-3? deci- kilo- milli- centi- None 4. Which of the following is the metric system’s basic measure of distance? inch meter mile kilometer None 5. Which of the following is the SI unit of length? Kilometer Inches Meter Feet None 6. Which of the following is the SI unit used to measure the amount of a substance? Gram Mole Kilogram Meter None 7. Which of the following Kelvin temperatures represents the freezing point of water? -273.15 K 273.15 K 373.15 K 0 K None 8. Which of the following best describes a cation? An atom that has more neutrons than protons An atom that has more electrons than protons An atom with a negative charge An atom that has more protons than electrons None 9. Which of the following best describes an ion? A charged atom An atom that does not react A neutral atom A pair of atoms with different mass numbers None 10. Which of the following correctly defines the term isotope? Atoms that have different numbers of neutrons, electrons, and protons. Atoms with the same number of neutrons and electrons, but a different number of protons. Atoms that have the same number of protons and neutrons, but a different number of electrons. Atoms with the same number of protons and electrons, but a different number of neutrons. None 11. Which of the following elements is a halogen? Cl Al H Ne None 12. Which of the following elements is a non-metal? Lithium Chlorine Lead Zinc None 13. Which of the following exists as a diatomic element? Xenon Helium Sodium Chlorine None 14. Which of the following elements is a metal? Neon Bromine Strontium Helium None 15. Which of the following occurs when ice melts? None of these Water molecules gain kinetic energy. Water molecules lose kinetic energy. The kinetic energy of water molecules does not change. None 16. Which of the following represents the original units for a concentration of a solution described as wt/wt%? g/g mol/kg g/mL mL/g None 17. Which of the following best describes a saturated solution? An unstable solution where crystals form A solution where more solute can dissolve A solution that contains salt A solution where no more solute can dissolve None 18. When brass is created by mixing zinc and copper, what type of solution is created? Liquid-liquid Alloy Emulsion Compound None 19. What kind of bond would hold carbon and hydrogen together? Ionic bond Metallic bond Covalent bond Hydrogen bond None 20. What type of bond is formed when a bond’s electrons are equally shared? Polar covalent bond Ionic bond Hydrogen bond Nonpolar covalent bond None 21. What type of bonding exists in NaCl? Isotopic Stoic Synthetic Ionic None 22. What type of reaction is shown below: 2C5H5 + Fe → Fe(C5H5)2 Double displacement Single displacement Synthesis Decomposition None 23. When methane (CH4) is heated in the presence of oxygen, water and CO2 are produced. What type of reaction is this? Synthesis Decomposition Combustion Double replacement None 24. Which is the strongest intramolecular force? Polar covalent bond Ionic bonding Metallic bonding Nonpolar covalent bond None 25. Which of the following is the oxidation number of magnesium in an ionic compound? 1+ 2+ 1– None 26. What is the oxidation number of oxygen? 2– 1– 1+ None 27. Which of the following does pH measure? The strength of an acid The concentration of hydrogen ions Acid concentration The concentration of hydroxide ions None 28. Which of the following represents a normal blood pH level? 14 7.40 7.0 0 None 29. Which of the following is emitted during beta decay? Proton Electron Neutron Nucleus None 30. What type of radiation produces a particle with no mass? Gamma radiation Beta radiation Positron emission Alpha radiation None 1 out of 30 Time is Up! Time's up
