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HESI A2 / CHEMISTRY EXAM QUESTIONS
Qs and Ans Expert- Explanation
This Exam contains:
-Guarantee passing score -23 Questions and Answers -format set of multiple-choice -Expert- Explanation
Question 1: What is the mass in grams of 1.0 mol oxygen gas?
Answer:
32 g
Question 2: Which of the following substances allows for the fastest diffusion?
Answer:
Gas
Question 3: Which material has the smallest specific heat?
Answer:
aluminum Question 4: What is the name for the reactant that is entirely consumed by the reaction?
Answer:
Limiting reactant
Question 5: What is the SI unit of energy?
Answer:
joule
Question 6: What is the name of the binary molecular compound NOs
Answer:
nitrogen pentoxide
Question 7: Which kind of radiation has no charge?
Answer:
gamma
Question 8: Which of the following orbitals is the last to fill?
Answer:
6s
Question 9: What are the van Der Waals forces?
Answer:
the weak forces of attraction between two molecules
Question 10: How many d orbitals are there in a d subshell?
Answer:
5
Question 11: Which of the following elements is an alkali metal?
Answer:
rubidium
Question 12: What is the name for the horizontal rows of the periodic table?
Answer:
Periods
Question 13: Which of the following elements is not involved in many hydrogen bonds?
Answer:
carbon
Question 14: Which of the following does not exist as a diatomic molecule?
Answer:
boron
Question 15: What is the Oxidation number of hydrogen in CaH2?
Answer:
-1
Question 16: What is the mass in grams of 7.35 mol water?
Answer:
132 g Question 17: What is the name of the state in which forward and reverse chemical reactions are occurring at the same rate?
Answer:
equilibrium Question 18: What is the name for a reaction in which electrons are transferred from one atom to another?
Answer:
redox reaction
Question 19: What is 119 k in degrees Celsius?
Answer:
-154 C
Question 20: Which of the following gases effuses the fastest?
Answer:
H2
Question 21: What is the name of the device that separates gaseous ions by their mass-to-charge ratio?
Answer:
mass spectrometer
Question 22: What is another name for aqueous HI?
Answer:
Hydriodic Acid
Question 23: What is the name for the number of protons in an atom?
Answer:
atomic number
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