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HESI CHEMISTRY (2024) EXAM QUESTIONS
Qs and Ans Expert- Explanation
This Exam contains:
-Guarantee passing score -45 Questions and Answers -format set of multiple-choice -Expert- Explanation
Question 1: What are the weakest bonds between two molecules
Answer:
dispersion forces
Question 2: Which molecule can act as both an acid and a base?
Answer:
H2O
Question 3: Which of the following describes a catalyst
Answer:
a substance that increases the rate of a chemical reaction
Question 4: A temperature of 100 degrees Celsius represents the
Answer:
boiling point of water
Question 5: What type of bonding exists in NaCl
Answer:
ionic Question 6: Which of the following is the correct term for chemicals in the left side of the reaction arrow?
Answer:
reactants Question 7: How many days will it take 128 kilograms of a radioactive substance to decay to 16 kilograms if it has a half life of 32 days?
Answer:
96
Question 8: What is the name given to a negatively charged atom?
Answer:
anion
Question 9: _____ is going from liquid to solid
Answer:
freezing
Question 10: Which of the following is not likely to have a dipole?
- polar compound
- salt
- non-polar compound
- ionic compound
Answer:
Non-polar compound
Question 11: Which of the following increases the rate of a chemical reaction?
Answer:
increasing the temperature Question 12: Which of the following correctly represents the general chemical formula of a carbohydrate
Answer:
(CH2O)n
Question 13: What is the oxidation number of oxygen?
Answer:
-2 Question 14: How many total amino acids are needed for the human body to produce all the proteins it needs?
Answer:
20
Question 15: Which of the following is not an intermolecular force?
- dipole-dipole interaction
- dispersion force
- hydrogen bond
- metallic bond
Answer:
Metallic bond Question 16: In a redox reaction, oxidation is the _____ of electrons and reduction is the _____ of electrons
Answer:
loss, gain
Question 17: Alkaline ph
Answer:
more than 7
Question 18: What terms describes the decay of an unstable isotope
Answer:
Half-life
Question 19: Which of the following does pH mean?
Answer:
The concentration of hydrogen ions
Question 20: intermolecular forces
Answer:
forces of attraction between molecules Question 21: Which of the following is the SI unit used to measure the amount of a substance
Answer:
mole
Question 22: An individual who weighs 70kg weighs how many pounds?
Answer:
154 70 x 2.2 = 154 Question 23: Which of the following is represented by the atomic number of an element?
Answer:
an element's number of protons
Question 24: Which term refers to a large group of amino acids joined together?
Answer:
polypeptide
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