Science History and What is Chemistry?
Numbers of Science
Atoms, Compounds, and Molecules
Ionic Compounds
Covalent Compounds
100
Which term best defines the following statement; “A body wholly or partially submerged in liquid is buoyed up by a force equal to the weight of the displaced liquid.”
Scientific Law
100
How many milliliters are in
2.4 x 102 kiloliters?
2.4 x 108 mL
100
How many protons, neutrons, and electrons does an atom with an atomic number of 17, a mass of 35 amu, and a charge of -1 have?
17 protons, 18 neutrons, 18 electrons
100
How many anions are in the formula for iron (III) bromide?
3
100
What is the name if NCl3?
nitrogen trichloride
200
True or False: If there is a strong correlation between two variables, one can also say that one variable causes the other.
False
200
Using the thermometer above, what is the temperature in degrees Celsius to the correct number of decimal places and with the correct uncertainty?
23 ± 1 °C
200
How many neutrons are in sulfur-33?
17
200
Is rubidium oxide soluble or insoluble?
soluble
200
How many double bonds does the Lewis structure of CO2 have?
2
300
Which physical change is being described here; “Particles start off not having the ability to be compressed and take the shape of their container. After the change they slow down and are still not capable of being compressed, but they do not take the shape of their container.”
Freezing
300
An insect travels at 0.25 meters per second. What is the speed in miles per hour?
0.56 mi/hr
300
How many neutrons are present in this atomic symbol?
143
300
Will calcium nitrate and sodium carbonate form a precipitate when mixed together, and if so, what is the formula of the precipitate?
Yes, CaCO3
300
What is the molecular geometry of PCl3?
trigonal pyramidal
400
What type of change is burning gasoline?
Chemical change
400
How many liters are in
6.5 x 10-3 microliters?
6.5 x 10-9 L
400
Baking soda (NaHCO3) is a
Pure element
pure compound
mixture of compounds
mixture of molecules
pure compound
400
What is wrong with this dissociation reaction?
Cs3PO4(s) -> Cs+(aq) + PO43-(aq)
Not balanced
400
Which intermolecular force explains why methane is a gas and hexane is a liquid?
London forces
500
What type of change is melting ice?
Physical change
500
What is the difference between these two graphs?
y-axis manipulation
500
Which layer of the atmosphere is the most dense and therefore has the highest atmospheric pressure?
troposphere
500
What is the name of Ni(OH)2?
nickel (II) hydroxide
500
What is the correct ranking of boiling point from lowest to highest?
H2 CH4 NH3 H2S
H2 < CH4 < H2S < NH3