Elements + Conversion
What is the difference between molecular and ionic compounds?
Molecular - covalent bonds between nonmetals
Ionic - electrostatic interactions between metals and nonmetals
What is the molar mass of sodium nitrate?
NaNO3
85.00 g/mol
What is the molecular geometry and polarity of CH4
Nonpolar, tetrahedral
What does it mean to be chiral?
There are 4 different groups around the central carbon atom
Calculate the molarity of a 1.5L solution with 36 g of HCl (molar mass of HCl=36.45 g/mol)
0.658 M
What is Avogadro's number
6.023 x 1023
What are the quantum numbers for the 2p orbital
n = 2
l = 1
ml = -1, 0, +1
ms = +1/2 (or -1/2, it doesn't really matter as long as they're all pointing the same way)
What is the hybridization of oxygen in water?
sp3
Define Charles' Law
The direct relationship between volume and temperature
V1/T1 = V2/T2
Name this compound CoCl2
Cobalt (II) chloride
Convert 112.7 m into nm
1.127 x 107 nm
Which block is the first to lose electrons when a transition metal becomes a cation?
the s block
Draw the Lewis structure and polarity for NH3
NH3
What is the relationship between bond length, bond order, and bond strength
As bond order increases, bond strength increases, and bond length decreases
If the pressure of a 12 mole system is 713 torr, the temperature is 23oC, what is the volume?
311 L
Calculate the protons, neutrons, and electrons in 2311Na+
protons - 11
neutrons - 12
electrons - 10
What is the condensed electron configuration for Calcium?
[Ar] 4s2
What are the two types of covalent bonds and what kind of overlap are they?
Sigma - head to head overlap of hybridized sp orbitals
Pi - side to side overlap of unhybridized p orbitals
What is a phase diagram? Describe two elements of one
A graphical representation of how the stabilities of the physical states of a substance depend on temperature and pressure
Any of these elements work: critical point, triple point, supercritical region, supercritical fluid, equilibrium lines
What is the equation used to calculate the quantity of heat/enthalpy?
q=mcdeltaT if specific heat is involved
q=ncdeltaT if molar heat capacity is given
What is the weighted atomic mass of magnesium if the isotopes have the following abundance?
24Mg = 78.99%, 23.985 amu
25Mg = 10.005%, 24.9858 amu
26Mg = 11.01%, 25.9853 amu
24.31 amu
If your theoretical yield is 95.6 g and your actual yield is 46.23 g, what is your percent yield?
48.6 %
I am a compound with a steric number of 6 with 2 lone pairs, what is my molecular geometry?
Square planar
What is an MO diagram? What is the difference between the scheme for N2 and O2
Shows the bonding behavior of a molecule
N2 has a 2-1-2-1 scheme
O2 has a 1-2-2-1 scheme
Balance this redox reaction:
Al + Fe2+ --> Fe + Al3+
2Al + 3Fe2+ ---> 3Fe + 2Al3+