CHEM 30A Exam 2 Review

Which of these do NOT exist as diatomic elements?

• C

• Br

• N

• F

What is the charge for sulfur?

• +2

• -2

• -3

• -1

How many valence electrons does nitrogen have?

• 3

• 4

• 5

• 6

Tags

NGSS.HS-PS1-1

What is the charge for barium?

• +1

• +2

• +3

• -2

What is the prefix for 7?

• hexa-
• hepta-
• octa-
• nona-

Which of these molecular geometries are always polar?

• bent

• linear

• trigonal planar

• tetrahedral

What is the charge of iron in FeO?

• +3

• +2

• -2

• -3

3 Li + AlCl3 -> 3 LiCl + Al

What type of chemical reaction is this?

• combination

• double replacement

• single replacement

• decomposition

True or False: 1 mole = 6.02 x 10^23 atoms, ions, molecules, or formula units

• False

• True

Tags

NGSS.HS-PS1-7

The molar mass is for ___ mole of substance.

• 1

• 6.02 x 10^23

• 2

• 3

Tags

NGSS.HS-PS1-7