Chemistry concepts and calculations

Which of the following statements best describes the role of calcium in the rele

Which of the following statements best describes the role of calcium in the release of a neurotransmitter substance from the presynaptic nerve terminal? A.Calcium entry into the p…

Which of the following statements best describes the role of calcium in the rele

                                     Which of the following statements best describes the role of calcium in the release of a                                                      …

Which of the following statements best describes the standard enthalpy (heat) of

Which of the following statements best describes the standard enthalpy (heat) of formation? a) The standard heat of formation is the enthalpy change for the formation of 1 mole of…

Which of the following statements best describes what happens when a small amoun

Which of the following statements best describes what happens when a small amount of solid rubidium chloride is dissolved in water? Question 4 options: The solid RbCl breaks apart…

Which of the following statements best describes what happens when a small amoun

Which of the following statements best describes what happens when a small amount of solid potassium fluoride is dissolved in water? A. The solid KF breaks apart into separate K a…

Which of the following statements best describes what occurs during translation?

Which of the following statements best describes what occurs during translation? A. mRNA is synthesized using protein as a template. B. DNA is reproduced C. mRNA is synthesized us…

Which of the following statements best describes why the KMno, test was performe

Which of the following statements best describes why the KMno, test was performed first in this experiment? The KMnOs test must be used first because no other test can break the l…

Which of the following statements best describes why the sugar phosphate nucleic

Which of the following statements best describes why the sugar phosphate nucleic acid backbone is on the outer part of the DNA double helix while the nitrogen bases are on the ins…

Which of the following statements best discribes what happens when a small amoun

Which of the following statements best discribes what happens when a small amount of solid rubidium bromide is dissolved in water? a) The heat from the warm water melts the solid,…

Which of the following statements can be made about the graph above? Check all c

Which of the following statements can be made about the graph above? Check all correct answers. Note:the y-axis is intensity of photons 1. Most of the suns ray that reach the Eart…

Which of the following statements concerning Newtonian and non-Newtonian fluids

Which of the following statements concerning Newtonian and non-Newtonian fluids is correct. Choose all that apply. A Newtonian fluid has a viscosity that remains constant regardle…

Which of the following statements concerning a face- centered cubic unit cell an

Which of the following statements concerning a face- centered cubic unit cell and the corresponding lattice, made up of identical atoms, is incorrect? If the atoms have radius r, …

Which of the following statements concerning balancing equations is false? There

Which of the following statements concerning balancing equations is false? There must always be a coefficient of 1 in an equation balanced in standard form.        The ratio of co…

Which of the following statements concerning buffers is false Buffers contain ap

Which of the following statements concerning buffers is false Buffers contain appreciable amounts of a weak acid and its conjugate base. The pH of a buffer is close to the pKa of …

Which of the following statements concerning carbohydrates is INCORRECT? A) Carb

Which of the following statements concerning carbohydrates is INCORRECT? A) Carbohydrates serve important energy and structural roles for plants and animals. B) Monosaccharides ar…

Which of the following statements concerning collision theory and the Arrhenius

Which of the following statements concerning collision theory and the Arrhenius equation is/are correct? (1) As the temperature increases, the rate of a reaction decreases due to …

Which of the following statements concerning crystal field theory is incorrect?

Which of the following statements concerning crystal field theory is incorrect? Low spin complexes are favored when the electron pairing energy (P) is less than the crystal field …

Which of the following statements concerning dislocations is FALSE? Dislocation

Which of the following statements concerning dislocations is FALSE? Dislocation density (count per volume) generally increases during plastic deformation at room temperature. The …

Which of the following statements concerning dislocations is FALSE? The energy r

Which of the following statements concerning dislocations is FALSE? The energy required to move a dislocation increases as the magnitude of the Burger's vector associated with a g…

Which of the following statements concerning distillation principles is TRUE? 1)

Which of the following statements concerning distillation principles is TRUE? 1)Distillation is a method for separating the components of a mixture based on boiling point differen…

Which of the following statements concerning distillation principles is TRUE? 1)

Which of the following statements concerning distillation principles is TRUE? 1)Distillation is a method for separating the components of a mixture based on boiling point differen…

Which of the following statements concerning entropy is NOT correct? a. The disp

Which of the following statements concerning entropy is NOT correct? a. The dispersal of matter, such as the spontaneous expansion of a gas, cannot be explained by an increase in …

Which of the following statements concerning entropy is/are true? On a per mole

Which of the following statements concerning entropy is/are true? On a per mole basis, the solid form of a particular substance has a greater entropy than its gaseous form. On a p…

Which of the following statements concerning entropy is/are true? On a per mole

Which of the following statements concerning entropy is/are true? On a per mole basis, the solid form of a particular substance has a greater entropy than its gaseous form. On a p…

Which of the following statements concerning equilibrium if net true? A system t

Which of the following statements concerning equilibrium if net true? A system that is disturbed from an equilibrium condition responds In a manner to restore equilibrium, Equilib…

Which of the following statements concerning equilibrium is not true? A system t

Which of the following statements concerning equilibrium is not true? A system that is disturbed from an equilibrium condition responds in a manner to restore equilibrium. Equilib…

Which of the following statements concerning equilibrium is not true? A system t

Which of the following statements concerning equilibrium is not true? A system that is disturbed from an equilibrium condition responds in a manner to restore equilibrium. Equilib…

Which of the following statements concerning intermolecular forces is/are CORREC

Which of the following statements concerning intermolecular forces is/are CORRECT? 1.) dipole-dipole attractions occur in all molecules that contain polar bonds, regardless of whe…

Which of the following statements concerning lattice energy is false? It is ofte

Which of the following statements concerning lattice energy is false? It is often defined as the energy released when an ionic compound forms from its ions. MgO has a higher latti…

Which of the following statements concerning lattice energy is false? MgO has a

Which of the following statements concerning lattice energy is false? MgO has a larger lattice energy than NaF. The lattice energy for a solid with 2+ and 2– ions should be two ti…

Which of the following statements concerning metabolism is FALSE? A) Metabolism

Which of the following statements concerning metabolism is FALSE? A) Metabolism refers to all of the chemical reactions that take place in living cells. B) Anabolism involves the …

Which of the following statements concerning molecular orbital (MO) bond theory

Which of the following statements concerning molecular orbital (MO) bond theory . is/are CORRECT? I MO theory can describe molecular bonding in excited states. 2. Molecular orbita…

Which of the following statements concerning osmosis is/are CORRECT? If any arc

Which of the following statements concerning osmosis is/are CORRECT? If any arc incorrect, explain why? Which of the following statements is/are CORRECT? If any arc incorrect, exp…

Which of the following statements concerning quantum mechanics is/are true? The

Which of the following statements concerning quantum mechanics is/are true? The behavior of submicroscopic particles can sometimes be described as waves. Quantum mechanics limits …

Which of the following statements concerning radioactive decay is/are incorrect?

Which of the following statements concerning radioactive decay is/are incorrect? 1. The form of the rate law for a radioactive decay is the same as for a first-order chemical proc…

Which of the following statements concerning real and ideal gases are TRUE? Real

Which of the following statements concerning real and ideal gases are TRUE? Real gases behave most like ideal gases at high pressure and loss temperature. Unlike ideal gases, ther…

Which of the following statements concerning real gases are correct? (1) nonidea

Which of the following statements concerning real gases are correct? (1) nonideality in gas behavior becomes more pronounced as the temperature of a gas is decreased. (2) The meas…

Which of the following statements concerning stereochemistry is INCORRECT? A) St

Which of the following statements concerning stereochemistry is INCORRECT? A) Stereoisomers are molecules with the same molecular formula, same bonding pattern, but different spat…

Which of the following statements concerning the attraction between ions and pol

Which of the following statements concerning the attraction between ions and polar solvent molecules arc correct? The larger the ion charge, the greater the attraction. The attrac…

Which of the following statements concerning the cubic unit cell is are CORRECT?

Which of the following statements concerning the cubic unit cell is are CORRECT? For cubic unit cells, three cell symmetries occur: primitive cubic, face-centered cubic, a body ce…

Which of the following statements concerning the determination of crystal struct

Which of the following statements concerning the determination of crystal structure by x-ray diffraction is incorrect? X-rays are reflected from the repeating planes of an ordered…

Which of the following statements concerning the separation of metal ions into A

Which of the following statements concerning the separation of metal ions into Analytical Groups I-V is/are correct? 3.The formation of a precipitate with the addition of dilute H…

Which of the following statements concerning thermal radiation is correct? a.As

Which of the following statements concerning thermal radiation is correct? a.As the temperature of an object increases,the total power emitted as thermal radiation increases and t…

Which of the following statements concerning use of the Downs Cell for the elect

Which of the following statements concerning use of the Downs Cell for the electrolysis of molten sodium chloride is incorrect? a)The pale green gas, Cl2, is liberated at the anod…

Which of the following statements correctly describes organic halides? A) Organi

Which of the following statements correctly describes organic halides? A) Organic halides have one or more H atoms substituted by an electronegative atom from group 17 of the peri…

Which of the following statements correctly explains why bromination reactions a

Which of the following statements correctly explains why bromination reactions are more selective than chlorination reactions: a) bromine radical is less stable than chlorine radi…

Which of the following statements correctly pertains to a pair of enantiomers? A

Which of the following statements correctly pertains to a pair of enantiomers?                                A.            They rotate the plane of polarized light by exactly the…

Which of the following statements describe hydrogen bonding between water molecu

Which of the following statements describe hydrogen bonding between water molecules or describe properties of water that lead to hydrogen bonding between water molecules? 1)The sl…

Which of the following statements describe hydrogen bonding between water molecu

Which of the following statements describe hydrogen bonding between water molecules or describe properties of water that lead to hydrogen bonding between water molecules? 1)The sl…

Which of the following statements describes a physical property of oxygen? Which

Which of the following statements describes a physical property of oxygen? Which of the following underlined items is not an intensive property? matter is uniform throughout, cann…