HESI A2 V1 CHEMISTRY EXAM QUESTIONS

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HESI A2 V1 CHEMISTRY EXAM QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -31 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation Question 1: A neutral atom contains seven electrons. How many protons does this atom contain?

Answer:

7

Question 2: Which statement regarding atomic size is true?

Answer:

K+ is smaller than neutral K atom Question 3: What is the molecular weight of ethanol C2H5OH (atomic weights are C=12 g/mol, H=1 g/mol, O=16 g/mol)?

Answer:

46 g/mol

Question 4: What is the expected pH of the stomach?

Answer:

0.90 to 1.50

Question 5: Water is in what state of matter at room temperature?

Answer:

Liquid

Question 6: The electron can be found in what location of an atom?

Answer:

Orbit Question 7: What is the amount of energy necessary to raise the temperature of one gram of a substance by one degree Celsius called?

Answer:

Specific heat Question 8: What term describes the affinity of two ions for the opposite charge?

Answer:

Electrovalent Bond (Ionic Bond) Electrostatic attraction

Question 9: What term best describes NaOH in this reaction?

HCl + NaOH = NaCl + H20

Answer:

Reactant

Question 10: An isotope has the same number of protons and a

Answer:

different number of neutrons

Question 11: The oxidation number of Magnesium (Mg) with any other compound is

Answer:

+2 Question 12: The substance in which the solute is dissolving into is known as the

Answer:

Solvent

Question 13: According to the law of conservation of energy

Answer:

Energy is neither created nor destroyed Question 14: What term describes the region in space where there is a high probability of finding an electron?

Answer:

Atomic ORBITAL Question 15: Which statement is correct about the description of chemical matter?

Answer:

A substance is a form of matter that has a definite composition and distinct properties

Question 16: Water can be observed in which states of matter on earth?

Answer:

Gas, Solid, Liquid Question 17: What process occurs when hydrogen and hydroxide ions are combined in equal concentrations?

Answer:

Neutralizations Question 18: What type of biochemical molecule contains two or more amino acids joined by peptide bonds?

Answer:

Protein

Question 19: What is systematic name of ammonia?

Answer:

Hydrogen Nitride/ Nitrogen Trihydride Question 20: Bacon grease is solid at room temperature and vegetable oil is a liquid. Although they have different properties, what type of biochemical compound describes both of them?

Answer:

Lipids

Question 21: When hydrogen and hydroxide ions are combined in equal concentrations.

Answer:

Ionization Occurs Question 22: What type of bond is caused by the electrostatic attraction between a metal and a nonmetal?

Answer:

Ionic Bond

Question 23: A urine sample with a pH value of 5.5 is

Answer:

Acidic

Question 24: Which statement is correct about these elements?

Answer:

Iron is a transitional metal Question 25: What subatomic particles are located in the nucleus and have no effect on the charge of an atom?

Answer:

Neutrons

Question 26: What is the strongest of the intermolecular forces?

Answer:

Hydrogen bonding Question 27: If an element has a mass number of 14, and contains 8 neutrons, what is the atomic number of this element?

Answer:

6 Question 28: The following are pH values for four different reservoirs. Which is the most acidic?

Answer:

6.5