Chemistry 101 Final Review

The quantity 0.003010 correctly expressed in scientific notation while retaining the current number of sig figs is____.

• 3.01 x 10^-3

• 3.010 x 10 ^-3

• 0.3010 × 10^−2
  

• 3.012 x 10^-2

Which of the following is/are likely to occur as a gas at room temperature?

• NH3

• O2

• CaF2

• CH4

• More than 1

Which ion is the largest ion among the following?

• P3-

• Cl-

• S2-

• ca2+

• K+

Which of the image(s) below represents a compound that should be classified as covalent

• 2 and 4

• 2 only

• 3, 4, and 5

• 2 and 3

• 2, 3, and 5

Which of the following substances has both ionic and covalent bonding?

• NaNO3
  

• NaCl

• I2

• AlCl3

Which of the following compounds is expected to have the lowest boiling point?

• KNO3

• CaF2

• H2O

• MgCl2

Which of the following statements about the structure and shape of ammonia, NH3, is not true?

• Each N—H bond in ammonia is pola

• The parent structure of NH3 is tetrahedral (AX4).

• The atoms in the NH3 molecule are in a trigonal-pyramidal arrangement, making the molecule pola

• The H—N—H bond angle is about 107 degrees

• The molecule contains two non-bonding pairs of electrons

Which of the following represents a polar covalent bond?

• H-Cl

• Cl-Cl

• H-H

• F-F

• Br-Br

Which of the molecules shown below is/are polar? Assume in this question only that every covalent bond in a molecule is polar

• 1 and 2

• 2 only

• 1, 2, and 3

• 1 and 3

Identify the main-group element that X in the following Lewis structure could stand for. O is oxygen.

• C

• N

• O

• Cl

• H