Post on 19-Jan-2016
Welcome Back!
Take a seat anywhere.
Agenda• Heading to Media Center for
Pretest• Take a look at wiki • Review of chapter 1• Hand out notes• Hand out books• Need lab notebook tomorrow!
Review of chapter 1
• Grab a white board and marker• Going to review whole chapter
today
Describe the scientific method and the purpose
of it.
Describe the differences between a hypothesis,
theory and law?
What is the law of conservation of mass and
why is it useful?
An antacid tablet weighing 0.853 g contained calcium carbonate as the active ingredient, in addition to an inert binder. When an acid solution weighing 56.519 g was added to the
tablet, carbon dioxide gas was released, producing a fizz. The
resulting solution weighed 57.152 g. How many grams of carbon dioxide
were produced?
Draw pictures to illustrate the three phases of
matter.
Describe what occurs during a physical change.
Describe what occurs during a chemical change.
Is grass growing an example of a physical or chemical change? Why?
Is a cake baking an example of a physical or chemical change? Why?
Is salt dissolving an example of a physical or chemical change? Why?
Describe how to tell the difference between an
element, compound and mixture.
What information is necessary?
Identify each of the following elements from its properties
under normal conditions.
• Red-brown liquid• White, waxy solid• Soft, yellow metal• Soft, black solid
• Reddish metal• Brittle, yellow solid• Greenish-yellow gas• Silver-colored liquid
metal
Describe the differences between accuracy and
precision.
Compare to bulls eye.
Describe significant figures. What’s the point?
A cylinder with circular cross section has a radius of 2.45 cm and a height of
56.32 cm. What is the volume of the cylinder?
What is the International System of Units?
List the base units.
List the prefixes.
Describe how to change from one unit into
another.
What are the conversion factors between oF, oC, and K?
What’s so special about K?
How would you determine the identity of an unknown
element?
If the necessary mass and density of a liquid are known, how would you determine the volume
needed?
A room measures 10.0ft X 12.0ft and is 9.0ft high.
What is its volume in liters?
If an atom has a radius of 85 pm, calculate the
percentage of the volume occupied by the atoms of
the gas, assuming STP conditions.
The density of an irregularly shaped object
is desired. How would you determine it?
A student determined the density of the metal sample to
be 19.0 g/cm3. The true density is 19.3 g/cm3. The
student claims the sample to be pure. Discuss the validity of the claim and possible sources
of error.
What does an interactive ppt mean to you?
How many have used ppt?2007?