Chemistry concepts and calculations

Which of the following is a useful guideline for the application of formal charg

Which of the following is a useful guideline for the application of formal charges in neutral molecules? A) A Lewis structure in which there arc no formal charges is preferred. B)…

Which of the following is a valid comparison of organocopper and organopalladium

         Which of the following is a valid comparison of organocopper and organopalladium reagents? a. Both   work equally well with alkyl compounds. b. Palladium   compounds are …

Which of the following is a valid explanation for the existence of a coarse-grai

Which of the following is a valid explanation for the existence of a coarse-grained (phaneritic) igneous rock on the surface of Earth? The coarse-grained rock formed from the accu…

Which of the following is a valid explanation for the existence of a coarse-grai

Which of the following is a valid explanation for the existence of a coarse-grained (phaneritic) igneous rock on the surface of Earth? The coarse-grained rock formed from the accu…

Which of the following is a valid set of quantum numbers? Answer n = -3, l = 2,

Which of the following is a valid set of quantum numbers? Answer n = -3,  l = 2, ml = -1, ms = 1/2 n = 4, l = 2, ml = -1, ms = -1/2 n = 2, l = 1, ml = 2, ms = 1/2 n = 2, l = 0, ml…

Which of the following is a weak polyprotic acid? A. H_2SO_4 B. H_2SO_3 C. NaHSO

Which of the following is a weak polyprotic acid? A. H_2SO_4 B. H_2SO_3 C. NaHSO_4 D. H_2Cr_2O_7 E. HClO_4 Determine the pH of the following solution. Initial concentrations are […

Which of the following is always necessary for a chemical reaction to occur betw

Which of the following is always necessary for a chemical reaction to occur between two reactants, A and B? A and B must be present in the same physical state There must be equal …

Which of the following is always necessary for a chemical reaction to occur betw

Which of the following is always necessary for a chemical reaction to occur between two reactants, Which of the following is always necessary for a chemical reaction to occur betw…

Which of the following is always true? One mole of sodium atoms has the same den

Which of the following is always true? One mole of sodium atoms has the same density as one mole of copper atoms. One mole of lithium atoms has the same number of protons as one m…

Which of the following is an Arrhenius base? A) H 2 SO 4 B) LiOH C) NH 2 CH 3 D)

Which of the following is an Arrhenius base? A) H2SO4 B) LiOH C) NH2CH3 D) CH3CH3 E) More than one of these is an Arrhenius base. Which of the following is a STRONG acid? A) C6H5C…

Which of the following is an INCORRECT statement relating to the behavior of gas

Which of the following is an INCORRECT statement relating to the behavior of gases? Which of the following is an INCORRECT statement relating to the behavior of gases? A) When a g…

Which of the following is an accurate statement of Hammond\'s postulate? The tra

Which of the following is an accurate statement of Hammond's postulate? The transition state of an exothermic reaction will resemble the starting materials (reactants) more than t…

Which of the following is an acid based reaction? Pb(NO3)2+2KI->2KNO3+PbI2 2Mg+O

Which of the following is an acid based reaction? Pb(NO3)2+2KI->2KNO3+PbI2 2Mg+O2->2MgO C2H8+5O2->3CO2+4H2O H2SO4+2KOH->K2SO4+2H2O Place the correct coefficients to ba…

Which of the following is an acid based reaction? Pb(NO3)2+2KI->2KNO3+PbI2 2Mg+O

Which of the following is an acid based reaction? Pb(NO3)2+2KI->2KNO3+PbI2 2Mg+O2->2MgO C2H8+5O2->3CO2+4H2O H2SO4+2KOH->K2SO4+2H2O Place the correct coefficients to ba…

Which of the following is an assumption used to simplify the Schrödinger Equatio

Which of the following is an assumption used to simplify the Schrödinger Equation for a one-electron atom? A. The potential energy function is approximated to depend only on the r…

Which of the following is an example of a chemical (as opposed to physical) chan

Which of the following is an example of a chemical (as opposed to physical) change? methane combusting to produce carbon dioxide and water vapor liquid water freezing to ice liqui…

Which of the following is an example of a positive feedback? An unpaid credit ca

Which of the following is an example of a positive feedback? An unpaid credit card balance that accrues interest The heating/cooling system of a house The human body cooling by sw…

Which of the following is an example of an observation? Reactions occur due to t

Which of the following is an example of an observation? Reactions occur due to the transfer of electrons. All matter is composed of small, indestructible particles called atoms. n…

Which of the following is an example of negative feedback in the glucagon signal

Which of the following is an example of negative feedback in the glucagon signaling pathway, depicted below? (select two answers) 1.PKA activates cyclic nucleotide phosphodiestera…

Which of the following is an example of the law of multiple proportions? The ato

Which of the following is an example of the law of multiple proportions? The atomic mass of bromine is found to be 79.90 amu. Two different compounds formed from carbon and oxygen…

Which of the following is an exception to octet rule of configuration? a) HCI b)

Which of the following is an exception to octet rule of configuration? a) HCI b) HNO3 c) H2SO4 d) H3PO4. Which of the following statements regarding the effect of a temperature ch…

Which of the following is an exchange reaction? HCl + NaOH rightarrow NaCl + H_2

Which of the following is an exchange reaction? HCl + NaOH rightarrow NaCl + H_2O dehydration C_6H_12O_6 + C_6H_12O_6 rightarrow C_12 H_24 O_12 hydrolysis Hydrolysis is an example…

Which of the following is an incorrect statement: a) All natural protein amino a

Which of the following is an incorrect statement: a) All natural protein amino acids are D-amino acids. b)-amino acids found in proteins can be classified according to whether the…

Which of the following is an ionic compound? a) SO_2 b) CIO_2 c) H_2 O d) CaO e)

Which of the following is an ionic compound? a) SO_2 b) CIO_2 c) H_2 O d) CaO e) CO_2 Calculate the number of hydrogen atoms in 0.25 moles of strychnine, C_21 H_22 N_2 O_2. a) 5.5…

Which of the following is an ortho-and Para-director? Which of the following is

Which of the following is an ortho-and Para-director? Which of the following is a meta-director? Which of the following is a meta-deactivating group? Which of the following is an …

Which of the following is an oxidation-reduction reaction? A) Mg(s) + 2 HCl(aq)

Which of the following is an oxidation-reduction reaction? A) Mg(s) + 2 HCl(aq) rightarrow MgCl_2 (aq) + H_2(g) B) NaI(aq) + AgNO_3(aq) rightarrow AgI(s) + NaNO_3(aq) C) HCl(aq) +…

Which of the following is an s-block element? a. Ca b. Pd c. U d. Br e. V Arrang

Which of the following is an s-block element? a. Ca b. Pd c. U d. Br e. V Arrange the following in order of decreasing radii: K, Mg, Mg^2+, Na. a. Mg^2+ > Mg > Na > K b. …

Which of the following is an unusual characteristic of interstitial hydrides? Se

Which of the following is an unusual characteristic of interstitial hydrides? Select one a Interstitial hydrides contain hydrogen b. The addition of hydrogen changes the physical …

Which of the following is another name for 4-chlorobenzaldehyde? What is the cor

Which of the following is another name for 4-chlorobenzaldehyde? What is the correct structure for 4-amino-2-benzaldehyde? What is the correct order of the names for the following…

Which of the following is another name for 4-chlorobenzaldehyde? p-chlorobenzald

Which of the following is another name for 4-chlorobenzaldehyde? p-chlorobenzaldehyde m-chlorobenzaladehyde o-chlorobenzaldehyde 1-chlorobenzaldehyde What is the correct structure…

Which of the following is are different between two optical isomers of phenylsuc

Which of the following is are different between two optical isomers of phenylsuccinic acid? Which optical designation rotates plane polarized light clockwise? What is the specific…

Which of the following is associated with +decay? (a) The parent and daughter nu

Which of the following is associated with +decay? (a) The parent and daughter nuclei still have the same n/pratio (b) The ratio of neutrons to protons is too low forstablility (c)…

Which of the following is best described as an oxidation-reduction reaction? Sol

Which of the following is best described as an oxidation-reduction reaction?

Which of the following is best described as an oxidation-reduction reaction? Sol

Which of the following is best described as an oxidation-reduction reaction?

Which of the following is best described as an oxidation-reduction reaction? Sol

Which of the following is best described as an oxidation-reduction reaction?

Which of the following is characteristic of a buffer? a. The pH will go down sig

Which of the following is characteristic of a buffer? a. The pH will go down significantly when OH^- is added to the buffer b. The pH will go down very slightly when OH^- is added…

Which of the following is characteristic of a nuclear reaction? I. Electrons in

Which of the following is characteristic of a nuclear reaction? I. Electrons in atomic orbitals art involved in the breaking and forming of bonds II. Elements are convened from on…

Which of the following is considered to be the smallest carbohydrate? Ribose Dih

Which of the following is considered to be the smallest carbohydrate? Ribose Dihydroxyacetone Formaldehyde Xylose Glucose Amylose and amyloprotein are the principle storage polysa…

Which of the following is correct Fischer projection of the compound on the left

Which of the following is correct Fischer projection of the compound on the left? Circle answer Solvolysis occurs when the solvent acts as the substrate the solvent dissociates th…

Which of the following is correct concerning a nucleophilic substitution reactio

Which of the following is correct concerning a nucleophilic substitution reaction on an organic substrate (substitution on C atom)? Select one: A. leaving group is the Nucleophile…

Which of the following is correct concerning anaerobic glycolysis in humans? a.

Which of the following is correct concerning anaerobic glycolysis in humans? a. This is the only process by which heart and liver cells utilize glucose to produce energy. b. Ethan…

Which of the following is correct for a system of an ideal gas such that the wor

Which of the following is correct for a system of an ideal gas such that the work done is zero? Question options:  PLEASE EXPLAIN...... The system expands when a constant   pressu…

Which of the following is correct? Each half-cell chemical reaction is always as

Which of the following is correct? Each half-cell chemical reaction is always assumed to be at equilibrium in a galvanic cell. Each net-cell chemical reaction is always assumed to…

Which of the following is correct? Each half-cell chemical reaction is always as

                            Which of the following is correct?                                                                  Each half-cell chemical reaction is always assumed …

Which of the following is correct? I. The S-O bond in SO 3 2- will be shorter th

Which of the following is correct? I. The S-O bond in SO32- will be shorter than the S-O bond in SO3. II. There are two possible Lewis structures for ozone, with each structure co…

Which of the following is currently an important use of diethyl ether (also know

Which of the following is currently an important use of diethyl ether (also known more simply as ether)? as a surgical anesthetic as a solvent as a fire extinguisher as an interme…

Which of the following is evidence that proteoglycans mediate cell growth proces

Which of the following is evidence that proteoglycans mediate cell growth processes? A] Heparin and heparin sulfate are known to inhibit cell proliferation in a process involving …

Which of the following is expected to be a faster S_N2 reaction. Reaction C or D

Which of the following is expected to be a faster S_N2 reaction. Reaction C or D? You may assume that any unspecified reactions conditions are the same for both reactions. reactio…

Which of the following is false concerning a catalyst? It affects the forward an

Which of the following is false concerning a catalyst? It affects the forward and reverse reaction rate There was no catalyst in the Dye experiment. It usually works to lower the …

Which of the following is generally true regarding the impact of the reduced spe

Which of the following is generally true regarding the impact of the reduced speed limit? (a) It always reduces the atmospheric emissions from vehicles (b) Whether it reduces the …