Week 1
homogenous
How many milliliters are in 8.5L?
8,500 mL
write the electron configuration for carbon.
1s22s22p2
Name the compound: CuCl2
Copper (II) chloride
Balance the following equation:
Fe2O3+C--->Fe+CO2
2Fe2O3+3C--->4Fe+3CO2
Calculate the formula mass for C2H5O3
77.06 u
The corrosion of the Statue of Liberty is an example of a ________ change.
A dam contains 9.3 milligrams of impurity per gallon of water. How many micrograms of impurity are present per liter of water? (0.264gal=1L)
2455 micrograms/L or 2500 micrograms/L (sig figs)
What element has the electron configuration of 1s22s22p63s23p2?
Silicon
Write the formula for lead (IV) nitrite
Pb(NO2)4
Classify the type of reaction:
Zn+CuCl2--->ZnCl2+Cu
single replacement
How many moles of NH3 are present in 78.2 gram sample?
4.59 moles NH3
A person going downhill on a bike is an example of ______ energy.
kinetic
Calculate the density for a solution that has a mass of 7.2 grams and a volume of 56.2 mL.
0.128 g/mL
Write the electron configuration for selenium using the noble gas shorthand.
[Ar]4s23d104p4
write the formula for diphosphorus tetroxide
P2O4
Name the element that is being oxidized and the element that is reduced:
Br2+Cu--->CuBr2
Cu is oxidized, Br is reduced
What is the mass in grams of 5.23x1023 nickel atoms?
51.0 grams Ni
Write 0.0000987 in scientific notation
9.87x10-5
Convert 35 degrees Celsius to Fahrenheit.
95 degrees Fahrenheit
A photon of light has an energy of 1.34x10-18 J. What is the wavelength of this light in nanometers? (h=6.63x10-34J/s) (c=3.00x108m/s)
149 nm
Covalent, Ammonia
Write the balanced combustion reaction for C3H8
C3H8+5O2--->3CO2+4H2O
A manufacturer reacts 145.0 kilograms of carbon with excess fluorine gas. What mass of CF4 is theoretically possible for this conversion? After the reaction is complete, the manufacturer isolates 565.2 kg of CF2. What was the percent yield for this process?
Theoretical: 603.6 kg
Percent yield: 93.64%
solve the following: (8.2x107)/(2.1x104)
3.9x103
What is the name of group 8A on the periodic table?
Noble gases
What is the electron configuration for sodium? What are the inner electrons and outer electrons?
1s22s22p63s1
all inner electrons except 3s1
Name the acid: HBr
hydrobromic acid
You expect to create 3.00 grams of a substance during a process and end up with a 54.3% yield. How many grams did you actually create?
1.63g
Identify the limiting and excess reactants given the following initial conditions:
0.5 mol C6H6
4 mol O2
2C6H6+15O2----12CO2+6H2O
Limiting reactant: C6H6
excess reactant: O2