HESI CHEMISTRY EXAM QUESTIONS

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HESI CHEMISTRY (2024) EXAM QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -45 Questions and Answers -format set of multiple-choice -Expert-Verified 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