Values
Avogadro's number
6.022x1023
The mass of a sample of brass is 2.50 g. If brass has a density of 8.47 g/cm3, what is the volume of this sample?
0.295 cm3
Wrong unit means no points!
What compound is represented by the name:
Pentabromine hexafluoride
Trisulfur triphosphide
Nitrogen monoxide
Br5F6
S3P3
NO
What is the physical meaning of temperature? What's the definition of pressure?
Temperature is the speed of individual particles
Pressure is force spread over an area
Sketch the cathode-ray tube experiment and state what it told about the nature of the atom.
The atom has a negative part that is easily removed
Number of torr in an atmosphere
1.01325
How many cL are in 4,500 microliters?
0.45 cL
What compounds refers to the following compounds:
Nickel(II) oxide
Lithium nitride
Lead(III) sulfide
NiO
Li3N
Pb2S3
What is the relationship between pressure and volume? What is relationship between volume and temperature?
P and V are inversely related
T and V are directly related
Which of the following becomes a cation? Does it gain or lose electrons when forming an ion?
Cs
I
Pb
Ar
Cs and Pb
Pico
10-12
An average man requires about 2.0 mg of riboflavin (Vitamin B12) per day. One slice of cheese contains 5.5 µg of riboflavin. How many slices of cheese would a man have to eat per day if it were his only source of riboflavin?
360 slices
Which of the compounds is incorrectly named?
Dicarbon trioxate
Magnesium iodide
Ditellurium nitride
Ammonium Sulfate
Dicarbon trioxate
Ditellurium mononitride
A gas takes up a volume of 50.0cL at a pressure of 600 torr. As the balloon falls, the atmosphere pressure decreases to 50.0 mm Hg. What is the new volume of the balloon?
600 cL
SIG FIGS
How many atoms are in the molecule Sc(NO3)3? How many ions? How many nitrogen atoms?
13 atoms
4 ions
3 nitrogen atoms
Mega
106
The re-entry speed of the Apollo 10 space capsule was 11.0 km/s. How many hours would it have taken for the capsule to fall through the 25,000 miles?
1 mile = 1.61 km
1.0 hours
What is the molar mass of the compound potassium phosphide?
148.269 g/mol
2.50 g of a gas is held in a 2.00 L container. It is measured to be at 25.0°C and 650 torr. What is the molar mass of this gas?
36 g/mol
Fill in the missing ions, name, and particle model of the compound K3PO3
K+ PO33-
Potassium sulfite
Number of pascals in 760 mm Hg.
1.01325x105
Diamonds are measured in carats and 1 carat = 0.200 g. The density of diamond is 3.51 g/cm3 . A diamond is dropped into a graduated cylinder filled with 30 mL of water and the final volume is measured to be 35 mL. How many carats is the diamond?
88 carats
What is the name of the following compounds?
(NH4)3PO4
Fe2(SO4)3
U(CO3)3
Ammonium Phosphate
Iron(III) sulfate
Uranium(VI) carbonate
A piston has a gas at 3.67 L at 35.0C and with a pressure of 2.50 atm. If the pressure increases to 3.00 bar, how would the temperature need to change to leave the volume constant? 1 atm = 1.01325 bar
91.8 C
Sketch why the compound rubidium oxide would conduct electricity in water and not carbon trisulfide.
Rb2O CS3
Both come apart, but only the first has ions that break apart, the other has molecules that stay together.