Formula for Success
Radiation? I hardly know EM!
Bohr-bitals
Periodically Trending
Chemically Crazy
100
10 KClO3 + 3 P4 → 3 P4O10 + 10 KCl
Given the above equation, how many moles of P4O10 can be produced if an initial amount of 25 mol KClO3 is mixed with excess P4?
7.5 mol P4O10
Mole Ratio: 3 mol P4O10/10 mol KClO3
100
Do UV rays have a higher frequency or a larger wavelength compared to x-rays?
Larger wavelength
100
Write the full electron configuration for silicon.
1s2 2s2 2p6 3s2 3p2
100
Which element has the largest atomic radius?
Francium
100
What is the molar mass of the amino acid serine?
C3H7NO3
105.096 g/mol
200
What is the empirical formula of a compound?
The simplest whole number ratio of atoms in a compound.
200
Solar panels collect energy from sunlight by exploiting what phenomenon?
The Photoelectric Effect
200
Which quantum number indicates the electron's suborbital?
Magnetic (mℓ)
200
What is Coulomb's Law?
F
(q1*q2)/r2
F = Force of attraction/IE
q = Charge of particle
r = distance between nucleus and electron
200
Identify the ground state element shown in the PES diagram.
Magnesium
300
A common type of rocket fuel has a molecular weight of 170.328 g/mol.
If the empirical formula is C6H13, then what is the molecular formula?
Bonus: Give the name of the organic compound.
C12H26
Dodecane
300
What is meant by the "dual nature of light"?
Light exhibits wave-like & particle-like properties.
300
Which rule or principle states that electrons will first fill orbitals of the lowest available energy, then fill orbitals of higher energy?
Aufbau Principle
300
List the following elements in order from the highest (most negative) to least electron affinity?
Sulfur, Neon, Oxygen
Oxygen, Sulfur, Neon
300
You are in the chemistry lab attempting to produce a sample of barium chloride (BaCl2). Theoretically, you should be able to produce 1438 g BaCl2 with your given amount of reactants.
If you produce 4.5 mol BaCl2, what is your percent yield by mass?
65.16% Yield
400
A compound contains 40% carbon by mass and 60% oxygen by mass. What is the empirical formula?
C8O9
400
The UV light that is used to clean our goggles has a wavelength around 220 nm.
What is the energy of that light?
Round to three sig figs.
1.98 x 10-16 Joules
400
The following electron configuration is for which ground state element?
[Ar] 4s2 3d10 4p2
Germanium
400
Why does ionization energy increase as you move from left to right on the periodic table?
More protons are added, resulting in a higher nuclear charge that pulls the electrons in closer.
400
What does the Heisenberg Principle state?
It is impossible to know both the position and momentum of an electron at the same time.
The more we know about the position, the less we know about its momentum and vice versa.
500
Consider the following equation:
C2H4 + 3 O2 → 2 CO2 + 2 H2O
If 4.95 g of ethylene combusts with 3.25 g or oxygen, which is the limiting reactant?
Oxygen is the limiting reactant.
500
Gamma knife surgery is a technique used by surgeons to precisely target and excise tumors or other abnormalities.
If the gamma ray photons used have a wavelength of 10 picometers, how much energy (in kJ) is in 3.25 mol of photons?
3.89 x 107 kJ
500
Which element's orbital configuration ends with 5p2?
Tin (Sn)
500
What is the electronegativity value of Argon?
Zero
500
On your whiteboard, draw the PES diagram for nitrogen.
Next, place an X where the peak for oxygen would go relative to nitrogen.
