Unit 1 Flashcards
One side of a cube measures 2.0 m. The volume of this cube is _______ m^3.
8.0
How many significant figures are in the measurement 0.000221700?
Six
What is the answer to the following problem using the correct number of significant figures? 1.00 x 7.000 x 2.0=
14
What is the answer to the following problem using the correct number of significant figures? 1.50 + 3.010=
4.51
How many sig figs are in the following measurement? 1.30 x 10^3
3
The correct answer (reported to the proper number of significant figures) to the following is… 4.0 x 2.00 =
8.0
What is the purpose of using significant figures in the science laboratory?
To determine the precision of measurement
You have a 5.2 L sample of oil. How many milliliters is this?
5200 mL
A patient must take 220 mg of pain medication every six hours. How many grams is that?
.22 g
You have signed up for a 8-kilometer race; how many centimeters will you be running?
8 x 10^5
3 kilogram = ______ milligrams
3 x 10^6
If you do not understand a direction or part of a lab procedure, you should ….
ask the instructor before proceeding
After completing an experiment, all chemical wastes should be …
disposed of according to your instructor’s directions.
A substance that can be separated by filtration might be a(n)
Heterogeneous Mixture
If matter is uniform throughout and cannot be separated into other substances by physical processes, but can be decomposed into other substances by chemical processes, it is called a(n) …
Compound
The teacher performs an experiment before the class. The student observes the following: gas given off, odor, gives off heat, change of color. What type of change has likely taken place?
A chemical change
Which phase change is occurring when solid carbon dioxide turns into a gas?
sublimation
If molecules go from flowing around one another to a state where they are much closer and vibrating about a fixed point, which phase change has occurred?
Freezing
Solids have a _____ shape and are ______.
definite, not easily compressed
You are given a large piece of wood. You cut the wood in half. What happens to the density?
The density does not change.
The density of aluminum is 3.00 g/mL. The volume of a piece of aluminum is 2.00 mL. Find its mass.
6.00 g
The density of a pure diamond is 4.0 g/mL. The mass of a diamond is 1.0 g. What is the volume?
.25 mL
The mass of a 10.0 mL sample of kerosene is 5.00g. The density of the kerosene is:
.500 g/mL
What is the density of distilled water?
1.0 g/mL
Look at the diagram attached. Which board shows precision but not accuracy?
Bottom left
True or False: Salt water, & salad can ONLY be separated by a chemical reaction.
False
True or False: Sodium chloride can ONLY be separated by a chemical reaction.
True.
True or False: Sodium, Salad and Sodium Chloride are classified as a homogeneous mixture.
False
True or False: Salt water is classified as a homogeneous mixture.
True
True or False: Sodium, salad, & salt water are classified as compounds.
False
True or False: Sodium Chloride is classified as a compound.
True
Is reactivity a chemical or physical property?
Chemical
Three physical properties of water are:
It has a boiling point of 100 degree Celsius. It is a colorless liquid. Sugar dissolves in it.
Is corrosion of metal a physical or chemical change?
Chemical
Is density an intensive or extensive physical property?
Intensive
Is mass an intensive or extensive physical property?
Extensive
When a metal rusts, is it a chemical or physical change?
Chemical
What kind of volume and shape does oil have at room temperature?
Definite volume, Indefinite shape
What kind of volume and shape does nitrogen take at room temperature?
Indefinite volume and indefinite shape
True or False: Water at 175 degrees Celsius is more easily compressed than water at 25 degrees Celsius or -10 degrees Celsius.
True
True or False: Two samples of a pure substance may have different densities
False
True or false: density is a chemical property
False
True or false: the density of a sample depends on its location on earth
false
True or false: density is a physical property
true
Look at the diagram attached. At which point will this compound be a liquid?
G
Look at the diagram attached. After the compound undergoes a decrease in pressure from point G to F; which phase change does it experience?
Evaporation
At point A, the compound is a ________. At point G, the compound is a ________.
Solid; Liquid.
(When the compound is below the line it is a gas.)
