Chemical Bonding
Behavior of Gases
Solutions
Periodic Table
Nuclear
100
Draw the lewis structure for a molecule of sulfur dioxide, SO2.
100
When the air bag inflates, the nitrogen gas is at a pressure of 1.30 atmospheres, a temperature of 301 K, and has a volume of 40.0 liters. Calculate the volume of the nitrogen gas at STP. Your response must include both a correct numerical setup and the calculated volume
What is.. 47.2 L
V2 = (273 K)(1.30 atm)(40.0 L)/(301 K)(1.00 atm)
100
A 3.2-gram sample of air contains 0.000 74 gram of hydrogen cyanide. Determine the concentration, in parts per million, of the hydrogen cyanide in this sample.
What is... 230 ppm or 2.31 × 102 ppm
100
Explain, in terms of the composition, why sample A represents a pure substance.
What is.. Sample A has only one type of molecule or All particles are the same or not a mixture
100
What is the decay mode of technetium-99?
What is beta decay
200
Is a molecule of Bromine polar or nonpolar? Explain in terms of charge distribution.
What is... nonpolar. The molecule has an even distribution of charge.
200
Compare the number of molecules found in Balloon #1 to the number of molecules found in Balloon #4.
What is.. the number of molecules is the same.
200
Based on Table G, state the general relationship between solubility and temperature of an aqueous NH3 solution at standard pressure.
What is.. As temperature increases the solubility of NH3 decreases.
200
Identify the noble gas that has atoms with the same electron configuration as the metal ions in cesium chloride, when both the atoms and the ions are in the ground state.
What is.. Xenon
200
Write the nuclear equation for the decay of radium-226
What is alpha decay (natural transmutation)
300
Explain why the structure shown below for calcium chloride is incorrect.
What is.. ions with a similar charge cannot be near each other.
300
According to the Kinetic Molecular Theory of Gases, why would a balloon filled with air expand if it were heated?
What is... the motion of the gases would increase and exert a greater pressure on the inside of the balloon, causing it to expand.
300
Explain, in terms of the molecular polarity, why ethylene glycol dissolves in water to form a solution.
What is.. ethylene glycol and water have the same polarity.
300
Pb(NO3)2(aq) + KI(aq) --> PbI2(s) + KNO3(aq)
Write a chemical name for the solid product.
What is.. Lead (II) Iodide
300
Which nuclear emission has no charge and no
mass?
What is gamma radiation
400
A 3.2-gram sample of air contains 0.000 74 gram of hydrogen cyanide. Determine the concentration, in parts per million, of the hydrogen cyanide in this sample.
What is... 230 ppm or 2.31 × 102 ppm
400
Based on Table H, state the vapor pressure of ethanol at 75°C.
What is.. 84 kPa - 87 kPa
400
Explain, in terms of ions, why an aqueous solution of potassium chromate conducts an electric current.
What is.. The Kr2CrO4 dissociated into mobile ions
400
The diagram below represents three elements in Group 13 and three elements in Period 3 and their relative positions on the Periodic Table.
Identify one element from the diagram that will react with phosphorus in the same manner as aluminum.
What is.. – Ga, – indium, – element 31, – element 49
400
Which reaction is accompanied by the release of
the greatest amount of energy?
(1) combustion of 10. g of propane
(2) electrolysis of 10. g of water
(3) nuclear fission of 10. g of uranium
(4) oxidation of 10. g of iron
What is (3)
500
Write a chemical formula of one compound formed by the combination of K+ ions with one of these ions as water completely evaporates from the seawater sample.
What is... KCl or K2SO4
500
Which liquid will evaporate more rapidly? Explain your answer in terms of intermolecular forces.
What is.. Liquid A. It has weaker intermolecular forces between its particles.
500
Show a correct numerical setup for determining how many liters of a 1.2 M solution can be prepared with 0.50 mole of C6H12O6.
500
Compare the radius of a chlorine atom to the radius of a Cl– ion.
What is.. The chlorine atom is smaller than a chloride ion.
500
Determine the half-life of krypton-92 if only 6.0 milligrams of an original 96.0-milligram
sample remains unchanged after 7.36 seconds.
What is 1.84 seconds