Moles and Molar Mass
Periodic Trends
Elemental Composition of Pure Substances
100

What is the Molar Mass of CO2?

44.01 g/mol

100

Al has a smaller atomic radius than Ar? True or False.

False. Ar has a smaller atomic radius than Al. 

100

Does all pure substances have a fixed composition?

Yes.

200

How many moles of H20 (11 g)?

0.61 moles

200

In terms of Ionization Energy, the larger the atomic radius the weaker or stronger attraction to its ve-.

The larger the atomic radius the weaker the  attraction. 

200
What are the two types of Pure Substances?

Elements and Compounds

300

What is the Molar Mass of H2SO3?

82.08 g/mol

300

Why are metals easier to lose electrons?

The nucleus doesn't have a stronger attraction to ve-.

300

Beach sand is a ___ mixture.

Heterogeneous.

400

How many moles of CH4 (5 g)?

0.31 moles

400

Why are nonmetals easier to gain electrons?

The nucleus has a stronger attraction to ve-.

400

Kool Aid is a _____mixture.

Homogeneous.

500

What is the Molar Mass of C12H22O11? 

342.3 g/mol?

500

What is Ionization Energy?

Energy required to remove an electron from a gaseous atom. 

500

Elements are composed of the same _____.

Atom.