| Assessment Questions: 44 results |
Matter_and_Measurement : ElementType (10 Variations)
Which of the following are metals?
Periodicity / Periodic Table
|
Atoms,_Molecules_and_Ions : ElementGroup (10 Variations)
The element neon is ...
Periodicity / Periodic Table
|
Atoms,_Molecules_and_Ions : GeneralPeriodicTable (12 Variations)
Which of the following statements concerning the periodic table is NOT correct?
Periodicity / Periodic Table
|
Bonding : Electronegativity (8 Variations)
From the bonds listed below, choose the one in which the highlighted atom is the partially positive end of the bond. (Try to predict electronegativity differences based on positions of the bonded atoms in the periodic table.)
Covalent Bonding |
Periodicity / Periodic Table
|
Bonding : MostPolarBond (8 Variations)
From the bonds listed below, choose the one that is the most polar. (Try to predict electronegativity differences based on positions of the bonded atoms in the periodic table.)
Covalent Bonding |
Periodicity / Periodic Table
|
Bonding : OrganicBondLength (10 Variations)
1-amino-2-naphthol-6-sulfonic acid is used as a photographic developer. The structure for this compound is shown below, although lone electron pairs are not shown. Which of the following bonds in the structure is the shortest?
Covalent Bonding |
Periodicity / Periodic Table
|
Molecular_Structure : AtomFromGeometry (8 Variations)
Which atom or atoms could be the central atom, X, in the stable molecule XH3 with one lone pair of electrons?
Atomic Properties / Structure |
Periodicity / Periodic Table
|
Atomic_Structure_and_the_Periodic_Table : CompareElectConfigs (8 Variations)
Compare the following two elements, identified by their electron configurations:
A - [Kr]4d95s2
B - [Ar]3d104s24p4
Select the answer(s) that has the correct comparison between elements.
Atomic Properties / Structure |
Periodicity / Periodic Table
|
Atomic_Structure_and_the_Periodic_Table : CompareRadii (10 Variations)
Which of the following have larger radii than a fluorine atom?
Atomic Properties / Structure |
Periodicity / Periodic Table
|
Atomic_Structure_and_the_Periodic_Table : ExplainPeriodicTrends (10 Variations)
In an isoelectronic series the ionic radii...
Atomic Properties / Structure |
Periodicity / Periodic Table
|
Atomic_Structure_and_the_Periodic_Table : GeneralPeriodicTrends (5 Variations)
Which of the following statements is an INCORRECT description of periodic trends for main group elements?
Atomic Properties / Structure |
Periodicity / Periodic Table
|
Atomic_Structure_and_the_Periodic_Table : IonizationEnerTrends (10 Variations)
Which of the following groups of elements is arranged correctly in order of increasing first ionization energy?
Atomic Properties / Structure |
Periodicity / Periodic Table
|
Atomic_Structure_and_the_Periodic_Table : Isoelectronic (4 Variations)
Which of the following atoms or ions does NOT have an electron configuration of [He]2s22p6?
Atomic Properties / Structure |
Periodicity / Periodic Table
|
Atoms,_Molecules_and_Ions : IonCharge (12 Variations)
Identify each of the following ions as having the correct or incorrect charge.
Atomic Properties / Structure |
Periodicity / Periodic Table
|
Atoms,_Molecules_and_Ions : CompareElements (10 Variations)
Which of the following is something that nitrogen and antimony have in common?
Atomic Properties / Structure |
Periodicity / Periodic Table
|
Atoms,_Molecules_and_Ions : IonChargeSubatmParts (10 Variations)
What is the charge on an ion that contains 47 protons, 62 neutrons, and 46 electrons?
Atomic Properties / Structure |
Periodicity / Periodic Table
|
Reactions : HighOxNumber (10 Variations)
In which of the following does sulfur have the highest oxidation number?
Atomic Properties / Structure |
Periodicity / Periodic Table |
Molecular Properties / Structure
|
Reactions : IDOxidationNumber (10 Variations)
What is the oxidation number of sulfur in barium sulfate (BaSO4)?
Atomic Properties / Structure |
Periodicity / Periodic Table |
Molecular Properties / Structure
|
Intermolecular_Forces__Liquids_and_Solids : LatticeEnergyMelting (8 Variations)
Which of these substances has the highest melting point?
Ionic Bonding |
Covalent Bonding
|
Thermochemistry : SystemSurrExoEndo (4 Variations)
Sulfuric acid is added to water in a beaker and the resulting solution is much warmer than either the water or acid was initially.
Identify the following items as being part of the system or the surroundings, and indicate whether the process is exothermic or endothermic.
Calorimetry / Thermochemistry
|
Thermochemistry : BondEnergies (10 Variations)
Use  to determine which of the following requires the most energy.
Calorimetry / Thermochemistry
|
Thermochemistry : FlaskTemp (6 Variations)
If 200. J of thermal energy was added to both flasks, which of the following would happen?
Calorimetry / Thermochemistry
|
Thermochemistry : GeneralEnergy (10 Variations)
Which of the following statements about energy is NOT true?
Calorimetry / Thermochemistry
|
Thermochemistry : ThermalEnergy (2 Variations)
The sketch below shows two identical flasks with different volumes of water at the same temperature. Which of the following is true?
Calorimetry / Thermochemistry
|
Thermochemistry : HeatTransfers (10 Variations)
A red-hot piece of lead is dropped into water. Which of the following statements are true? (Assume that there are no energy transfers between anything except the lead and the water.)
Calorimetry / Thermochemistry
|
Bonding : IonicOrCovalent (10 Variations)
Match the following formulas to the correct type of bonding: ionic or covalent.
Molecular Properties / Structure |
Covalent Bonding |
Ionic Bonding
|
Thermochemistry : BombCalorimeter (4 Variations)
Stearic acid (CH3(CH2)16CO2H) is a fatty acid, the part of fat that stores most of the energy. 1.00 g of stearic acid was burned in a bomb calorimeter. The bomb had a heat capacity of 652 J/oC and a 500. g water reservoir. If the temperature rose from 25.0 to 39.3 oC, how much heat was released when the stearic acid was burned?
Calorimetry / Thermochemistry |
Chemometrics
|
Thermochemistry : CalcHStateChange (4 Variations)
Calculate the enthalpy change when 100. g of ice at 0.0 oC is heated to liquid water at 50.0oC. (The heat of fusion for water is 333 J/g.)
Calorimetry / Thermochemistry |
Chemometrics
|
Thermochemistry : CoffeeCupCalorimeter (2 Variations)
A block of copper is heated to {x} °C and then is dropped into a coffee cup calorimeter containing {y} g of water at 25.0 °C. The final temperature of the system is 45.1 °C. What is the mass of the copper block to the nearest gram? (Assume all heat is transferred to the water). Write your answer in the box, and do NOT include units.
Specific heat capacity of copper = 0.383 J/(g*°C)
Specific heat capacity of water = 4.18 J/(g*°C)
Calorimetry / Thermochemistry |
Chemometrics
|
Thermochemistry : FuelAmpWattHeat (4 Variations)
Gasoline has an enthalpy of combustion of approximately 24000 kJ/gallon. When gasoline burns in an automobile engine, approximately 30% of the energy released is used to produce mechanical work. The remainder is lost as heat transfer to the engine's cooling system and eventually the atmosphere. As a start on estimating how much heat transfer is required, calculate what mass of water could be heated from 25 to 100oC by the combustion of 1.0 gallon of gasoline in an automobile.
Calorimetry / Thermochemistry |
Chemometrics
|
Thermochemistry : HeatCapacityGraph (6 Variations)
Consider the graph above. Which of these substances has the highest specific heat capacity?
Calorimetry / Thermochemistry |
Heat Capacity
|
Thermochemistry : HeatCapacityLiq (4 Variations)
100 g of water (c=4.184 J/g.oC), 100 g of ethanol (c=2.46 J/g.oC), 100 g of carbon tetrachloride (c=0.861 J/g.oC), and 100 g of ethylene glycol (c=2.42 J/g.oC) at 50oC were each placed into a separate coffee cup calorimeter and the temperature recorded. The temperature of the surroundings was 20oC. After one hour the temperature of which substance would have changed by the largest amount? Assume that the rate of heat transfer from the coffee cup to the surroundings was the same in each case.
Calorimetry / Thermochemistry |
Heat Capacity
|
Thermochemistry : CalcHBondEnergy (14 Variations)
Use the bond energies given in to estimate the  Ho for the reaction given below:
hint: both carbon dioxide and molecular oxygen have double bonds
Calorimetry / Thermochemistry |
Chemometrics
|
Thermochemistry : CalcHCombustion (6 Variations)
Using the thermodynamic data given in  , determine the enthalpy change for the combustion of ethane to produce carbon dioxide and water vapor. 2C2H6(g) + 7O2(g) 4CO2(g) + 6 H2O(g)
Calorimetry / Thermochemistry |
Chemometrics
|
Thermochemistry : EnthalpyEnergy (10 Variations)
2SO2(g) + O2(g)2SO3(g)
Horxn = -197.78 kJ
How much energy is transferred when 96.6 g of SO2 reacts to form SO3?
Calorimetry / Thermochemistry |
Chemometrics
|
Bonding : EnergyBreakAllBonds (10 Variations)
Use the bond energies given in to determine the total energy needed to break all of the bonds in C3H6. (Do not use ring structures.)
Covalent Bonding |
Calorimetry / Thermochemistry
|
Thermochemistry : HeatCapacitySolLiq (4 Variations)
The Table below lists the specific heat capacities of several metals and liquids.
| Substance |
Specific Heat Capacity
J/(g.oC) |
Substance |
Specific Heat Capacity
J/(g.oC) |
| Al |
0.902 |
H2O |
4.18 |
| Fe |
0.451 |
C2H5OH |
2.46 |
| Cu |
0.383 |
CCl4 |
0.861 |
| Au |
0.128 |
CCl2F2 |
0.598 |
In an experiment, 50 g of a metal was heated to 100oC and placed in 200 g of a liquid at 25oC. Which of the following combinations of metal and liquid will produce the largest temperature increase in the liquid? (Assume that there is no transfer of energy to the surroundings.)
Calorimetry / Thermochemistry |
Heat Capacity
|
Thermochemistry : CalcHHessLaw (8 Variations)
The industrial process for making sulfuric acid has three steps. Using the data given, calculate the enthalpy change for the overall reaction for the process (the equation is given below).2S(s) + 3O2(g) + 2H2O(l)2H2SO4(l)
Data:
| S(s) + O2(g) SO2(g)
| Hrxn = -296.83 kJ
|
| 2SO3(g)O2(g) + 2SO2(g)
| Hrxn = -198.2 kJ
|
| SO3(g) + H2O(l)H2SO4(l)
| Hrxn = -227.72 kJ
|
Calorimetry / Thermochemistry |
Chemometrics
|
Thermochemistry : MassFromCalorimetry (2 Variations)
The table below lists the specific heat capacities of several metals and liquids. | Substance | Specific Heat Capacity
J/(g.oC) | Substance | Specific Heat Capacity
J/(g.oC) | | Al | 0.902 | H2O | 4.18 | | Fe | 0.451 | C2H5 OH | 2.46 | | Cu | 0.383 | CCl4 | 0.861 | | Au | 0.128 | CCl2F2 | 0.598 |
In an experiment a block of aluminum was heated to 100oC and placed in 200 g of water at 25oC. If the final temperature of the system is 43oC, and no heat transfer to the surroundings occurred, what is the mass of the aluminum block?
Calorimetry / Thermochemistry |
Chemometrics
|
Thermochemistry : CalcMolarEnthalpy (5 Variations)
White phosphorus, P4, ignites in air to produce heat, light, and P4O10 according to the following reaction. P4(s) + 5O2(g) P4O10(s) If 67.2 g of P4 is burned,1620 kJ of energy is evolved. What is the molar enthalpy of combustion of P4 if the process was carried out under constant pressure?
Calorimetry / Thermochemistry |
Chemometrics
|
Thermochemistry : ConvertEnergyUnits (4 Variations)
The label on a granola bar says it provides 120 Calories. How many kilojoules of energy will this bar provide if it is completely metabolized?
Calorimetry / Thermochemistry |
Nomenclature / Units / Symbols
|
Thermochemistry : PhaseChangeEnthalpy (10 Variations)
A solid melts to a liquid. Which of the following statements are true? (Assume constant pressure and a flexible container.)
Calorimetry / Thermochemistry |
Phases / Phase Transitions / Diagrams
|
Thermochemistry : PhaseChanges (8 Variations)
Steam at 100oC is condensed by an ice-water mixture at 0oC. Assuming that there is still ice present when the process is over, how much ice will be melted if 10.0 g of steam is condensed? The following may be useful:
enthalpy of vaporization of water = 40.7 kJ/mol; enthalpy of fusion of water = 6.07 kJ/mol; specific heat capacity of water = 4.184 J/g•K.
Calorimetry / Thermochemistry |
Phases / Phase Transitions / Diagrams
|
Intermolecular_Forces__Liquids_and_Solids : PhaseEnergyChanges (6 Variations)
When a liquid is transformed into its vapor at constant temperature,
Phases / Phase Transitions / Diagrams |
Calorimetry / Thermochemistry
|
