SI System
SI unit for counting
The mole!
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
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
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
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
Avogadro's number
6.022x1023
A sample of gold weighs 3.66 g. How many atoms of gold are contained within?
1.12 x 1022
Which of the compounds is incorrectly named?
Dicarbon trioxate
Magnesium iodide
Ditellurium nitride
Ammonium Sulfate
Dicarbon trioxate
Ditellurium mononitride
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
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
What is the molar mass of the compound potassium phosphide?
148.269 g/mol
How many protons, neutrons, and electrons are in the sample 200Ir6+?
Protons: 77
Neutrons: 123
Electrons: 76
What are the seven SI base units?
Kilogram
Meter
Second
Kelvin
Mole
Amp
Candela
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
Fill in the missing ions and name of the compound Fe3N2
Fe2+ N3-
Iron(II) nitride