Exam 3 Practice - Pre-AP Chem

15 Questions | By Jkrug | Updated: Mar 21, 2022 | Attempts: 517

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An exam covering electrons in atoms, periodic properties, ionization, the mole concept, and the kinetic-molecular theory.

Questions and Answers

1.

In which of the following states of matter do the molecules take the shape of their container?
- A.
  
  Solid
- B.
  
  Liquid
- C.
  
  Gas
- D.
  
  Liquid AND gas
2.

According to the kinetic-molecular theory, particles of matter are in motion
- A.
  
  At absolute zero
- B.
  
  At all temperatures above absolute zero
- C.
  
  Only in gases
- D.
  
  Only in liquids
3.

Which instrument, invented by Evangelista Torricelli, measures the pressure of the atmosphere?
- A.
  
  Barometer
- B.
  
  Manometer
- C.
  
  U-tube
- D.
  
  Torrometer
4.

Convert the pressure 2.42 atmospheres to kilopascals. Remember that 1 atm = 101.3 kPa.
- A.
  
  2 kPa
- B.
  
  115 kPa
- C.
  
  41.9 kPa
- D.
  
  245 kPa
5.

How many moles are in 2.8 x 10²⁴ atoms of W?
- A.
  
  0.215 mol
- B.
  
  4.65 mol
- C.
  
  855 mol
- D.
  
  4.65 x 10⁴⁸ mol
6.

What is the mass of one mole of BaCl₂?
- A.
  
  172.8 g
- B.
  
  208.3 g
- C.
  
  137.3 g
- D.
  
  345.8 g
7.

What is the number of moles in 432 grams of Ba(NO₃)₂?
- A.
  
  0.237 mol
- B.
  
  0.605 mol
- C.
  
  1.65 mol
- D.
  
  3.66 mol
8.

What group of elements on the Periodic Table tends to have the highest ionization energy?
- A.
  
  7
- B.
  
  18
- C.
  
  1
- D.
  
  8
9.

In this diagram, what is the first ionization energy for beryllium?
- A.
  
  496 kJ/mol
- B.
  
  521 kJ/mol
- C.
  
  738 kJ/mol
- D.
  
  899 kJ/mol
10.

Which of the following ions does NOT have an octet?
- A.
  
  Na⁺
- B.
  
  S^2-
- C.
  
  Sr⁺
- D.
  
  P^3-
11.

How does a calcium atom most commonly achieve an octet of electrons?
- A.
  
  By gaining 1 electron
- B.
  
  By gaining 2 electrons
- C.
  
  By losing 2 electrons
- D.
  
  By losing 1 electron
12.

Of the following elements, which has the highest electronegativity value?
- A.
  
  Fr
- B.
  
  I
- C.
  
  O
- D.
  
  Al
13.

How many valence electrons would be found in an atom of oxygen?
- A.
  
  4
- B.
  
  2
- C.
  
  6
- D.
  
  5
14.

One mole of water molecules would fill
- A.
  
  The whole world.
- B.
  
  A high school gymnasium.
- C.
  
  A small shot glass.
- D.
  
  The state of Florida.
15.

Which one of the following could NOT be a unit of pressure?
- A.
  
  Newtons per square meter
- B.
  
  Pounds per square inch
- C.
  
  Pascal
- D.
  
  Manometers per square foot