Week 5 Summaries
This weeks videos discussed the mole, molarity, molality, osmolarity, osmolality and
tonicity. The mole is simply a name referring to a number. One mole is equal to 6.022 times 1023.
1 gram is equal to 1 mole ti
Chapter 8 Textbook Questions
1. A pile of marbles weigh 394.80 g. 10 marbles weigh 37.60 g. How many marbles are in
a. There would be 105 marbles in the pile.
2. Calculate the mass (in amu) of 231 atoms of carbon.
Lab: Observations of Chemical Changes
NaHCO3 and HC - CO2
The mixture will bubble.
HCI and BTB
The acid HCI will change the color of the BTB.
NH3 and BTB
The basic NH3 wil
Chapter One Assignment
1. Which of the following is an example of a quantitative observation?
The piece of metal is longer than the piece of wood.
Solution 1 is much darker than solution 2.
The liquid in beake
Experiment #2 Physical and Chemical Properties
Data Table 1 : Solubility or Reaction
Chapter 3 Textbook Problems
1. List an example of the following:
Change in one or more physical properties of a substance, not in its chemical
A change in state of matter will drastically alter the physical properti
Week 4 Textbook Problems
1. Of the 118 known elements, how many are found in nature?
a. 88 elements from the periodic table occur naturally.
2. What is the most abundant element in the Earth?
a. Oxygen is the most abundant eleme
Week 2 Video Response
An orbital is an area around the nucleus of an atom where there is a probability of finding
an electron. If we assume that an atom is neutral, then they will have the same number of
electrons as protons. The
Introduction to Chemistry : Week 1 Videos
Pure substances that have specific properties at certain temperatures are called
elements. The elements are all organized on the periodic table. The smallest unit of an element
is an atom.
Week 4 Summaries
This week the videos covered types of chemical bonds which are ionic, covalent, polar
covalent and metallic. All bonds are atoms sticking together because they are sharing electrons.
An ionic bond creates a cati
Experiment 3: Lab Techniques and Measurements
Data Table 1: Length Measurements