Conversions
Convert 23 cm to m.
0.23 m
Write the following number is standard notation:
6.32 x 10-2
0.0632
What is a qualitative observation?
An observation about the qualities of something
A type of matter formed by chemically joining two or more elements
compound
Boiling point, solubility, color, taste and density are all examples of...
physical properties
Convert 3,600,000 mm to km.
3.6 km
Write the following number in scientific notation:
3,102,000
3.102 x 106
Convert 432 K to Celsius.
158.85 K
Hydrogen, Gold, and Iron are all examples of...
elements
A sheet of metal is 2 cm wide, 10 cm tall and 1.5 cm long. It has a mass of 42 grams. What is its density?
1.4 g/cm3
Convert 3 days to seconds.
259,200 seconds
How many sig figs are in this number:
103.40
5
What is the difference in accuracy and precision?
accuracy - how close a measurement is to an accepted value
precision - how close your measurements are to each other
This is another name for homogeneous mixtures.
solution
Which property of matter measures a substance's ability to dissolve?
solubility
Convert 20 ft to meters
6.096 meters
How many sig figs are in this number:
0.00000000000005
1
What is the density of a cube that has a volume of 2.56 mL and 40.2 grams?
15.7 g/mL
Explain the difference between compounds and mixtures.
compounds are chemically combined, mixtures are physically combined.
What are 2 possible pieces of evidence that a chemical reaction has occurred?
Release of light
Sudden temp change
Sudden color change
Odor change
Gas given off
Appearance of precipitate
Convert 71,000 mL to gallons
18.8 gallons
4.56 x 3.2
15
Micah tells his mom he can't go to school today to take his chemistry test because he is running a temperature of 310.2 K. What is his temperature in degrees Fahrenheit?
98.7
Determine if the following mixtures are homogeneous or heterogeneous:
1.) saltwater
2.) vegetable soup
3.) paint
1.) homogeneous
2.) heterogeneous
3.) heterogeneous
What is the difference between extensive and intensive properties?
Extensive - depends on the amount of matter present
Intensive - does NOT depend on the amount of matter present