Chemistry Video 701 Quiz Questions

Which of the following correctly represents the compound formed from the ions Sr2+ and Se2-?
a. SrSe

b. Sr2Se2

c. Se2Sr2

d. SeSr

The starting substances in a chemical reaction are called the _____?
a. products

b. yield

c. reactants

d. coefficients

In chemistry class, what do we mean when we refer to a mole?
a. a fuzzy little creature

b. a dozen

c. 6.02 x 10²³

The periodic table tells you how many grams are in a mole of atoms of any element. This is known as the
a. gramole

b. molar mass

c. atomic mass unit

What is the molar mass of aluminum chloride?
a. 62.5 g/mol

b. 133.5 g/mol

c. 116.5 g/mol

How many moles of atoms are in 12.0 grams of helium?
a. 1

b. 2

c. 3

d. 4

How many molecules of water are in 4.8 moles of water?
a. 7.97 x 10-24

b. 2.89 x 1024

c. 5.20 x 1025

d. 1.61 x 1023



(Answers:  1.A  2.C. 3.C.  4.B.  5.B. 6.B. 7.C.)