Unit 1-2
(Measurement, Lab Equipment, and Matter)
(Measurement, Lab Equipment, and Matter)
Convert 5 Km to mm
5,000,000
How many valence electrons does Germanium (Ge) have?
4
Write the formula of tetraphosphorus dichloride.
P4Cl2
What are the products of a combustion reaction?
water and carbon dioxide
State the Law of Conservation of Mass
Matter cannot be created nor destroyed.
Write 49,045,000,000 in scientific notation.
4.9045x1010
How many protons, neutrons, and electrons are in Bromine?
P+: 35
n0: 45 (80-35)
e-: 35
Draw the Lewis Dot Structure for carbon disulfide
S=C=S
Determine the reaction type:
AlCl3 + Na2S → Al2S3 + NaCl
Double replacement
What is the name of the elements in Group 2?
Alkaline Earth Metals
How many significant figures are in 0.0093060?
5
What element has the highest electronegativity?
(sodium, carbon, or chlorine?)
Chlorine
Is PbO ionic or covalent? How do you know?
Ionic, it contains a metal
Balance the equation:
Al + Br2 --> AlBr3
2 Al + 3 Br2 --> 2 AlBr3
Why isn't fission a practical option for energy right now?
It requires temperatures at over a million degrees celsius.
What is the density of a 4 gram object that has a length of 5 cm, width of 6 cm, and height of 7 cm?
0.019 g/cm3
Write the noble gas notation for iodine.
[Kr]5s24d105p5
Write the formula of calcium nitrate.
Ca(NO3)2
How many molecules of TiO2 are in 2.5 grams?
1.9 x 1022 molecules
What two molecular shapes are always polar?
Bent and Trigonal Pyramidal
If the original pressure was 865 torr and the original temperature was 24oC, what is the temperature of the gas (in Kelvin) when the pressure is reduced to 750 torr?
T2 = 259 K
If U-238 undergoes alpha decay, what element does it turn into?
Thorium
What is the name of H3AsO4?
Arsenic Acid
If you were to burn 15g of propane gas (with oxygen), how much carbon dioxide would you release into the atmosphere (in g)?
44.90 g CO2
Explain the difference between an ion and an isotope.
An ion is an atom with a different number of electrons (develops a charge). An isotope is an atom with a different number of neutrons (different mass number).