| Assessment Questions: 50 results |
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
|
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
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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
|
Gases : IDGasFromVelocity (8 Variations)
The following are graphs of molecular velocities versus the relative number of molecules for argon, chlorine, methane and xenon at 300K. Which graph is for argon?
Gases |
Molecular Properties / Structure
|
Gases : RealGases (6 Variations)
Which gas in the following list will have the greatest deviation from ideal behavior at STP?
Gases |
Molecular Properties / Structure
|
Matter_and_Measurement : ElemCompdMix (10 Variations)
Classify each of the following as an element, compound, or mixture.
Molecular Properties / Structure
|
Matter_and_Measurement : HomoOrHeteroMix (10 Variations)
Identify the following as homogeneous or heterogeneous mixtures.
Molecular Properties / Structure
|
Matter_and_Measurement : ThryOrHypothesis (6 Variations)
Identify each of the following statements as a theory or a hypothesis.
Molecular Properties / Structure
|
Matter_and_Measurement : ClassifyMatter (8 Variations)
Which of the following descriptions best classifies aluminum foil?
Molecular Properties / Structure
|
Stoichiometry : CombustionAnalysis (10 Variations)
While working in the lab, you find a bottle of white powder labeled
"analgesic compound #5". Since the original investigator neglected
to record the identity of the substance, you decide to perform a
combustion analysis to identify the compound. You have a 65.7 g
sample that when burned produces 182 g CO2 and 51.7 g
H2O. What is the formula of this compound? (The compound
only consists of C,H, and O.)
Stoichiometry |
Molecular Properties / Structure
|
Stoichiometry : FormulaFromComp (8 Variations)
Lactic acid is the substance that makes your muscles burn when you've been exercising hard. Lactic acid is composed of 40.0% carbon, 6.7% hydrogen, and 53.3% oxygen by weight. If it has a molar mass of 90 g/mol, what is its molecular formula?
Stoichiometry |
Molecular Properties / Structure
|
Bonding : ValenceElectrons (10 Variations)
Determine the number of valence electrons for each molecule or ion and match it with the number in the pull-down list to the right of the formula.
Molecular Properties / Structure
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Bonding : DetermineStructure (8 Variations)
H
A substance is analyzed and found to contain 57.10% carbon, 4.80% hydrogen and 38.06% oxygen by weight. Its molecular weight is determined to be 126.11 g/mol. Which of the structures shown are possible structures for the substance?
Molecular Properties / Structure |
Stoichiometry
|
Atoms,_Molecules_and_Ions : IonicOrMolecular (10 Variations)
Identify each of the following compounds as ionic or molecular.
Molecular Properties / Structure
|
Atoms,_Molecules_and_Ions : AllotropesOfElement (4 Variations)
Which of the following is an allotrope of oxygen? (You may select more than one.)
Molecular Properties / Structure
|
Atoms,_Molecules_and_Ions : AtomicRatio (10 Variations)
Which compound(s) contain the most nitrogen atoms per molecule or formula unit?
Molecular Properties / Structure |
Stoichiometry
|
Atoms,_Molecules_and_Ions : BinaryMolcFromImage (8 Variations)
Which of the following binary compounds could the figure below best represent? 
Molecular Properties / Structure |
Stoichiometry
|
Atoms,_Molecules_and_Ions : IonicFormula (10 Variations)
Which pair of ions will form a compound of formula M2X?
Molecular Properties / Structure |
Stoichiometry
|
Atoms,_Molecules_and_Ions : IonicProperties (8 Variations)
Which of the following statements concerning the properties of ionic compounds is NOT correct?
Molecular Properties / Structure
|
Atoms,_Molecules_and_Ions : IonType (8 Variations)
Identify the following ion as monatomic or polyatomic and as an anion or a cation: Cr2O7-2
Molecular Properties / Structure
|
Atoms,_Molecules_and_Ions : CalcMolarMass (8 Variations)
What is the molar mass of potassium phosphate,
K3PO4?
Enter the numeric value very carefully below, rounding to one decimal place only. Do not put the units in, but think about what the
units are!
Molecular Properties / Structure |
Stoichiometry
|
Atoms,_Molecules_and_Ions : CompFromNanoPic (9 Variations)
__________ can be represented by the nanoscale diagram below. 
Which of the following is the best choice to fill in the blank?
Molecular Properties / Structure
|
Organic : HsOnAlkaneBackbone (10 Variations)
The carbon skeleton for 2-methylbutane is shown below. How many hydrogens are present?
Alkanes / Cycloalkanes |
Molecular Properties / Structure
|
Biochemistry : Amphiphile (20 Variations)
Which of the following molecules is an amphiphile?
Molecular Properties / Structure |
Noncovalent Interactions
|
Biochemistry : StructureDef (4 Variations)
What kind of structure is defined by the linear sequence of amino acids in the protein chain?
Proteins / Peptides |
Molecular Properties / Structure
|
Biochemistry : Secondary (15 Variations)
What secondary structure element is represented by the green sequence in the following structure of the protein calmodulin?
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Proteins / Peptides |
Molecular Properties / Structure
|
Bonding : CompareBondLength (5 Variations)
Which of the following compounds has the shortest bond between nitrogen and oxygen?
Covalent Bonding |
Molecular Properties / Structure
|
Biochemistry : Tertiary (16 Variations)
Which of the following is NOT true about the tertiary structure of water-soluble proteins?
Proteins / Peptides |
Molecular Properties / Structure
|
Stoichiometry : CompareParticles (20 Variations)
Which has the greater number of particles, 1 mol O2 or 1 mol O?
Molecular Properties / Structure |
Atomic Properties / Structure
|
Bonding : IonicOrCovalent (10 Variations)
Match the following formulas to the correct type of bonding: ionic or covalent.
Molecular Properties / Structure |
Covalent Bonding |
Ionic Bonding
|
Intermolecular_Forces__Liquids_and_Solids : BoilingPoint (10 Variations)
Which of the following substances has the highest boiling point?
Liquids |
Noncovalent Interactions |
Molecular Properties / Structure
|
Intermolecular_Forces__Liquids_and_Solids : IntermolecularForces (10 Variations)
For which of the following compounds is hydrogen bonding the strongest?
Noncovalent Interactions |
Molecular Properties / Structure |
Hydrogen Bonding
|
Intermolecular_Forces__Liquids_and_Solids : OrganicBoilingPoint (11 Variations)
Which of the following organic compounds has the highest boiling point?
Noncovalent Interactions |
Molecular Properties / Structure |
Hydrogen Bonding
|
Nomenclature (10 Variations)
A collection of 10 assessment questions about Nomenclature
Physical Properties |
Carboxylic Acids |
Esters |
Molecular Properties / Structure |
Aromatic Compounds |
Amines / Ammonium Compounds |
Phenols |
Nomenclature / Units / Symbols |
Alkanes / Cycloalkanes |
Stereochemistry
|
Bonding (34 Variations)
A collection of 34 assessment questions about Bonding
Molecular Properties / Structure |
Covalent Bonding |
IR Spectroscopy |
VSEPR Theory |
Aromatic Compounds |
Lewis Structures |
Resonance Theory |
Aldehydes / Ketones |
Carboxylic Acids |
Acids / Bases
|
