Chemistry 112 ACS Flashcards Complete Exam Questions With 100% Verified Answers

decreases - correct answers Energy (decreases/increases) with increasing wavelength? increases - correct answers Energy (decreases/increases) with increasing frequency? decreases - correct answers The energy gaps between levels (decrease/increase) as the energy levels increase (n=1 to n=2 to n=3, etc.) 110° - correct answers The O-Si-O bond angles in SiO₂ (quartz) are closest to... linear - correct answers A molecule with 0 lone pairs and 2 bonding electron pairs would be? bent - correct answers A molecule with 1 lone pair and 2 bonding electron pairs would be? Trigonal pyramidal - correct answers A molecule with 3 bonding electron pairs and 1 lone pair would have what VSEPR shape? Seesaw - correct answers A molecule with 4 bonding electron pairs and 1 lone pair of electrons would have what VSEPR shape? Octahedral - correct answers A molecule of 6 bonding electron pairs would have what shape? Shape refers to the orientation of atoms while geometry accounts for both atoms and electron orientations. - correct answers Difference between molecular shape and geometry? T shaped - correct answers A molecule of 3 bonding electron pairs and 2 lone pairs of electrons would have what shape? Square pyramidal - correct answers A molecule with 5 bonding electron pairs and 1 lone pair would have what shape? Square planar - correct answers A molecule with 4 bonding electron pairs and 2 lone pairs would have what shape? Trigonal bipyramidal - correct answers A molecule with 5 bonding electron pairs would have what shape? Tetrahedral - correct answers A molecule with 4 bonding electron pairs would have what shape? Trigonal planar - correct answers A molecule with 3 bonding electron pairs would have what shape? 1 sigma, 2 pi - correct answers Triple bonds have ___ sigma bonds and ___ pi bonds. 1 sigma, 1 pi - correct answers Double bonds have ___ sigma bonds and ___ pi bonds. 1 sigma, 0 pi - correct answers Single bonds have ___ sigma bonds and ___ pi bonds. have multiple electron dot formulas - correct answers Resonance structures describe molecules that ___ ¹Excess of electrons in Lewis Dot diagram, ²Special indstance e.g. Sulfur, ³Rare Gas - correct answers Name 3 instances when the octet rule can be broken Hybridization - correct answers Four equivalent, single, covalent bonds by carbon in its compounds that resemble methane, CH₄ is a result of _____ s - correct answers For simple cubic, 2r= √3 · s - correct answers For body centered cubic, 4r= √2 · s - correct answers For face centered cubic, 4r= Temperature - correct answers What factor affects the vapor pressure of a liquid? at or below the critical temperature - correct answers A gas or vapor may be liquified only at temperatures ____ 5 - correct answers # of atoms per unit for Face centered cubic 2 - correct answers # of atoms per unit for Body centered cubic 1 - correct answers # of atoms per unit for simple cubic 8 - correct answers # closest atoms in Body Centered Cubic 12 - correct answers # closest atoms in Face Centered Cubic 6 - correct answers # closest atoms in Simple cubic single (NOT DOUBLE OR TRIPLE) - correct answers What type of bond exists between the two N atoms in N₂O₄? endothermic - requires the absorption of energy - correct answers Liquid evaporating in an (endothermic/exothermic) process k=Ae^(-Ea/RT) - correct answers Arhennius equation slowest - correct answers The (slowest/fastest) reaction determines the rate law? ln(k₀/k)=kt - correct answers Integrated Rate expression for 1st order 1/[A] - 1/[A₀] = kt - correct answers Integrated Rate expression Both the rate of reaction and the value of the equilibrium constant will increase. - correct answers What will be the effect of increasing the temperature of reactants that are known to undergo endothermic reaction? The number of molecules above the reaction energy threshold will double. - correct answers What will be the effect of increasing temperature from 10 to 20 degrees celsius on the reacting molecules if the rate of the reaction is doubled? increase with increasing temperature - correct answers The value for the rate constant of a reaction can generally be expected to... The reaction with the larger activation energy will be faster - correct answers Two reactions with different activation energies have the same rate at room temperature. What is also true if the temperature is increased? changing the mechanism of the reaction and reduces the activation energy for a reaction and increases the rate of the reaction - correct answers A catalyst increases the rate of a reaction by... temperature - correct answers The numerical value for the equilibrium constant of any chemical change is affected by changing the... pH=pKa + log([A]/[HA]) where A is the amount of H+ ions dissociated and HA is the amount of anion dissociated (***in molar). - correct answers Henderson Hasslebalch equation ∆G = -RTlnK - correct answers ∆G = E=E⁰-(0.0592/n)·log(Q) where n is the number of electrons reduced/oxidized or E=E°-(RT/nF)lnQ - correct answers E = NH₃ - think Ammonia cleaning solution - correct answers Which gas is most soluble in water: NH₃, H₂, CH₄, or N₂? It forms an adherent and insoluble oxide coating - correct answers What property of aluminum makes it particularly useful in lining for steel tanks cars transporting nitric acid? Variable oxidation number, colors - correct answers What is a characteristic property of transition elements? Water with dissolved ions of Ca²⁺ and Mg²⁺ - correct answers What is hard water? Cl S Se - correct answers Put S, Se, and Cl in order of increasing atomic radius. up and left to right on the periodic table - correct answers Electron affinity increases... left to right and up the periodic table - correct answers Ionization energy increases right to left and down the periodic table - correct answers Atomic radius increases moving up a group and left to right - correct answers Electronegativity increases P₂V₂/T₂= - correct answers P₁V₁/T₁= h∨ - correct answers E= h/m∨ - correct answers λ = λ x v - correct answers c=