HESI A2 CHEMISTRY EXAM STUDY MATERIAL

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HESI A2 CHEMISTRY EXAM STUDY MATERIAL

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -72 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation

Question 1: Which of the following gases effuses the fastest?

Cl2 O2 N2 H2

Answer:

H2

Question 2: Which of the following orbitals is the last to fill?

1s 3s 4p 6s

Answer:

6s Question 3: Which of the following is exchanged between two or more atoms that undergo ionic bonding?Neutrons Transitory electrons Valence electrons Electrical charges

Answer:

Valence electrons Question 4: Which of the answer choices provided best defines the following statement: For a given mass and constant temperature, an inverse relationship exists between the volume ad pressure of a gas?Ideal Gas Law Boyle's Law Charles' Law Stefan-Boltzmann Law

Answer:

Boyle's Law Question 5: What type of organic reaction occurs when water is released as two functional groups bond together?

Answer:

Condensation Question 6: What is the name of the device that separates gaseous ions by their mass-to-charge ratio?

Answer:

Mass spectrometer

Question 7: What is another name for aqueous HI?

Answer:

Hydriodic acid

Question 8: Which of the following is true?

Mass and weight are the same thing Mass is the quantity of matter an object has Mass equals twice the weight of an object Mass equals half the weight of an object

Answer:

Mass is the quantity of matter an object has

Question 9: According to Charles' Law:

Answer:

Temperature and volume are directly related Question 10: What type of substance has some properties of a metal, but is made up of a mixture of different elements?

Answer:

Alloy

Question 11: What is 119 K in degrees Celsius?

Answer:

154 degrees Celcius

Question 12: Which kind of radiation has no changes?

Answer:

Gamma

Question 13: What is the mass (in grams) of 1.0 mol oxygen gas?

Answer:

32g Question 14: What is the difference between an Arrhenius base and a Bronsted-Lowery base?

Answer:

The Arrhenius base releases hydroxide ions, and the Bronsted-Lowery base accepts hydrogen ions Question 15: What is the release of a massive amount of energy caused by the bombarding and splitting of a nucleus by a neutron called?

Answer:

Nuclear fission Question 16: According to the second law of thermodynamics:

Answer:

Entropy is always increasing in the universe

Question 17: Which of the following does not exist as a diatomic molelcule?

Boron Flourine Oxygen Nitrogen

Answer:

Boron

Question 18: Which of the following statements is not true of most metals?

They are good conductors of heat They are gases at room temperature They are ductile They make up the majority of elements on the periodic table

Answer:

They are gases at room temperature

Question 19: Which of the following elements is an alkali metal?

Magnesium Rubidium Hydrogen Chlorine

Answer:

Rubidium Question 20: The process of sublimation occurs when a ______ changes into a ______.

Answer:

Solid, gas Question 21: What is most likely the pH of a solution containing many hydrogen ions (OH-) and few hydrogen ions (H+)?

Answer:

9

Question 22: What are two types of measurement important in science?

Answer:

Quantitative and qualitative