Properties of Atoms/Matter
Significant Figures
Dimensional Analysis
Laws & Theories
Chemical Nomenclature
100
A mixture that is uniform in composition and appearance
What is homogeneous?
100
How many significant figures are in the following measurements?
1. 6.702 mL
2. 0.00330 g
3. 18.00 s
1. 4 sig figs
2. 3 sig figs
3. 4 sig figs
100
Convert 8.00 m to inches (1 inch = 2.54 cm)
315 in.
100
Matter is composed of small particles called atoms, which are neither created nor destroyed during a chemical change, but instead rearranged.
What is Dalton's Atomic Theory?
100
Formula that contains nonmetal molecules, written like CH4
What is the molecular formula?
200
A fundamental unit of matter, it cannot be divided while retaining its identity
What is an atom?
200
How many sig figs are in the final answer?
(12.3 + 0.06) * 53.44
660.518, 6 sig figs
200
How many seconds are in 2.5 days?
2.5 day (24 hr / 1 day)(60 min / 1 hr)( 60 sec / 1 min) = 2.2 x 10^5 or 220,000 sec
200
A compound always forms from a fixed ratio of its elements
What is Law of constant composition/definite proportions?
200
Negative anions formed by elements on the right side of the periodic chart
What are anions?
300
Can only be observed when a substance is changed into another substance
What is a chemical change?
300
Write these numbers in scientific notation:
1. 42,000
2. 27.0040
3. 150,000,000
4. 0.00000003500
1. 4.2 x 10^4
2. 2.70040 x 10^1
3. 1.5 x 10^8
4. 3.500 x 10^-8
300
A 525 gram rock contains 25.0% gold. How many grams are gold?
131 g of Au
300
The discovery of the nucleus using alpha particles at a very thin piece of gold foil was discovered by this scientist.
Ernest Rutherford
300
Name the following cations:
1. Fe 2+
2. Fe 3+
3. Cu +
4. Cu 2+
1. iron (II) ion
2. iron (III) ion
3. copper (I) ion
4. copper (II) ion
400
Depends on the amount of substance present, e.g Mass, Volume, and Energy
What are extensive properties?
400
Round the following into a 4 SF number
1. 1999.5
2. 335.645
3. 80236
4. 18,000
1. 2000
2. 335.6
3. 80240
4. 1.800 * 10^4
400
The diameter of a red blood cell is about 3 x 10-4 inches. What is the diameter in centimeters?
7.6 x 10^-4 cm
400
The charge on the electron was discovered to be 1.6 x 10^-19, through this experiment.
What is the Millikan Oil Drop Experiment?
400
Write the molecular formula for the following polyatomic anions
1. nitrate ion
2. sulfate ion
3. perchlorate ion
4. hypochlorite ion
1. NO3-
2. SO4 2-
3. ClO4 -
4. ClO -
500
Independent of the amount of substance that is present. e.g Density, boiling point, color, etc.
What are intensive properties?
500
An irregularly shaped metal object has a mass of 48.4416 g. When the object is placed into a graduated cylinder containing 15.1 mL of water the volume rises to 20.8 mL. What is the density of the object with the correct number of significant figures?
500
As an instructor is preparing for an experiment, he requires 225 g of phosphoric acid. The only container readily available is a 150-mL Erlenmeyer flask. Is it large enough to contain the acid, the density of which is 1.83 g/mL?
Yes, the acid's volume will be 122.95 mL
500
If two elements form more than one compound, then the ratios of the masses of the second element combined with a fixed mass of the first element will be ratios of small, whole numbers.
What is Law of Multiple Proportions?
500
Name the following ionic compounds
1. CaCl2
2. Al(NO3)3
3. Cu(ClO4)2
1. calcium chloride
2. aluminum nitrate
3. copper (II) perchlorate