CHEM 108 REVIEW!

What's my name?

100

Na₂O

sodium oxide

200

P₂O₅

diphosphorus pentoxide

300

Ca(OH)₂

Calcium hydroxide

400

Na₂CO₃

sodium carbonate

500

Bi(NO₃)₃

bismuth (III) nitrate

Avogadro's number and not avocado's number

100

6.02x10²³ 

Avogadro's number

200

1 mole element = _________ of element

1 mole element = 6.02x10²³ atoms of element

300

To convert between grams and mole, what do we use?

molar mass

400

How many moles are there in 1.25x10²³ atoms of Fe?

1.25x10²³ atoms Fe x ( 1mole Fe / 6.02x10²³ atoms Fe) =  0.208 mole Fe

500

How many grams of calcium are there in 2.02 x 10²³ atoms of calcium?

13.4 g

Balancing Act

100

The reaction is ____ when the number of atoms are equal on both sides of the equation

balanced

200

Balance the following chemical equation. 

Fe + O₂ --> Fe₂O₃

4 Fe + 3O₂ --> 2 Fe₂O₃

300

Balance the following equation.  

   Li + Br₂ --> LiBr

2Li + Br₂ --> 2LiBr

400

Balance the following Equation: 

_____KClO₃ ---> KCl + ______O₂

2KClO₃ ---> 2KCl + 3O₂

500

What do we change to balance a chemical equation?

The coefficients

The name is bond

100

This is used to represent the structure of an atom

Lewis Structure

200

How many bonds are there for carbon?

4

300

A simple chemical rule of thumb that states that atoms tend to combine in such a way that they each have eight electrons in their valence shell in order to feel "complete

Octet rule

400

What is the shape of CS₂?

linear

500

What is the shape of OF₂?

Bent