Definitions
Significant Figures
Classification of matter
Periodic Table & AMU
Dimensional analysis w/ sig. figs.
100
What is matter?
Matter is anything that has mass and takes up space.
(From lecture slides)
100
How many significant figures: 1 L = 1000mL
Infinite--it's a definition
(From lecture slides)
100
“White gold,” used in jewelry, contains gold and
another “white” metal such as palladium. Two
different samples of white gold differ in the
relative amounts of gold and palladium that they
contain. Both samples are uniform in
composition throughout. Without knowing any
more about the materials, how would you
classify this material?
Homogenous mixture because it is uniform throughout but does not have a specific, definite formula and ratios
100
An atom of 198 Au has ___ protons, ___ neutrons, and ___ electrons.
79, 119, 79
100
Convert 5.00m into inches
- 100 cm = 1 meter
- 1 inch = 2.54 cm
197 inches
(Modified lecture slide problem)
200
What is a physical property?
Properties of a substance that can be observed without changing a substance into another substance.
(From lecture slides)
200
How many significant figures: 0.000002023000
7
200
Aspirin is composed of 60.0% carbon,
4.5% hydrogen, and 35.5% oxygen by
mass, regardless of its source. How would you
to characterize and classify aspirin?
Pure substance made of compounds because it has a definite ratio of elements that does not change.
(From lecture slides)
200
What element is defined by the following information?
p+ = 11
n* = 12
e- = 11
sodium
200
The average speed of a carbon dioxide molecule in the stratosphere of the Earth travels at a speed of 1651 m/s. Convert into miles per hour.
(Not fact checked)
- 1 km = 1000 meters
- 1 mile = 1.6093 km
3693 miles per hour
(Modified lecture slide problem)
300
What is a chemical property?
Properties of a substance that can be observed ONLY when a substance is changed into another substance.
(From lecture slides)
300
How many significant figures: 238.1500 - 14.8 =
223.4
300
Tap water
Homogeneous mixture
300
Determine the number of protons, neutrons and electrons in the following:
p+ : 18 n* : 22 e- : 18
300
The Earth's oceans contain approximately 1.36 x 10^9 km^3 of water. Calculate the volume in liters.
- 1 L = 10^-3 m^3
1.36 x 10^21 L
(From lecture slides)
400
What is an extensive property?
A property that is dependent upon the amount of the substance present (mass, volume, energy, etc. etc.)
(From lecture slides)
400
How many significant figures: 10054.67 + 454.2 + 64.78 + 289 =
10863
400
Diamonds
A pure substance made of entirely carbon (element) in a crystalline structure which gives diamond it's characteristic hardness.
400
Which atom has the smallest number of neutrons?
A) neon-20
B) nitrogen-13
C) fluorine-18
D) carbon-14
E) oxygen-16
104.87 amu
400
What is the mass in grams of 1.00 gal of
water?
- 1.00 g water = 1 mL water
- 1 L = 1000 mL
- 1 L = 1.057 qt
- 1 gal = 4 qt
3.78 x 10^3 g of water
(From lecture slides)
500
What is an intensive property?
A property that is independent of the amount of the substance that is present (density, boiling point, color, etc. etc.)
(From lecture slides)
500
How many significant figures: (15 x 2.4) + (360/15.5) + (3.278 x 100.2) =
388
500
Milk
homogeneous
500
Calculate the atomic mass of silver if silver has 2 naturally occurring isotopes with the following masses. Ag-107 is 51.54% abundant.
Ag-107 : 106.90509 amu
Ag-109 : 108.90476 amu
104.87 amu
500
A toy car is moving at a speed of 3.5 cm/s, what is the toy car's speed in kilometers per hour?
- 1 meter = 100 cm
- 1 km = 1000 m
0.13 kilometers per hour