Show:
Reactions and Stoichiometry
Electronic Structure and Periodicity
Thermochemistry
Bonding
Chemistry Pot-luck
100
A reaction that produces a gas is carried out in a sealed vessel on a balance. What happens to the mass the balance shows, as the reaction proceeds?
It does not change
100
How many unpaired electrons does a ground state N atom have?
3
100
What is the average kinetic energy per particle more commonly called?
Temperature
100
What type of bonding would you expect to exist in a sample of bronze?
Metallic bonding
100

What is the only letter of the alphabet that DOESN'T appear on the periodic table?

J (also accept Q, but it used to be there for Uuq)

200
Which of these is a weak acid? C6H12O6, H2SO4, HNO3, HF, HClO4
HF
200

Which of the following ground-state elements is diamagnetic? Fe, Zn, Na, Mn

Zn

200
What happens to the enthalpy of a system during an endothermic process?
It increases
200
What is the missing word? Breaking bonds __________ energy
"requires" or "needs"
200
Apart from mercury, what is the only other element that is liquid at room temperature and atmospheric pressure?
Bromine
300
What is the formula of the precipitate formed when ammonium sulfate solution reacts with strontium nitrate solution?
SrSO4
300

Write the equation for the decay of tritium (hydrogen with two neutrons)

H31 --> He32 + e0-1 + antineutrino

(antineutrino does not need to be included)

300

Which has the greatest entropy at the same temperature? 

1 mol ice

1 mol liquid water

1 mol water vapor

1 mol hydrogen in standard state with 0.5 mol oxygen in standard state

1 mol hydrogen in standard state with 0.5 mol oxygen in standard state

300
Which species has the strongest bond? HF, HCl, HBr, HI

HF

300
Which form (allotrope) of oxygen is produced in lightening strikes?
Ozone (O3)
400
How many moles of oxygen gas are required to completely burn 4 moles of methanol (CH3OH)?
2CH3OH + 3O2 gives 2CO2 + 4H2O 6moles of O2 are required
400
Which of these elements has the lowest first ionization energy: Mg, Al, Si, P, B, C, N ?
Al (dip after Mg)
400

Upon which of the following factors does Gibbs free energy depend? (can be multiple) Temperature, concentration of species in solution, rate of reaction

temperature, concentration

400

Which of these species displays resonance? ammonium, phosphate ion, carbon dioxide, carbon monoxide

phosphate ion

400

What color is permanganate?

Purple

500
What piece of glassware is used to make up an exact 1.000M solution of NaCl(aq)?
Volumetric flask
500
What is the correct explanation for why a sulfide ion has a larger radius than a sulfur atom?
Increased electron-electron repulsion in the outer shell
500

A system confined in a rigid, well-insulated container undergoes a spontaneous change. What must be true about enthalpy or entropy?

entropy increases

500

How many sigma and pi bonds are present in allene (H2CCCH2)

6 sigma, 2 pi

500

What scientist did the gold foil experiment?

Rutherford