Chemistry concepts and calculations

Which of these statements is true about chemical equilibria in general? (1) At e

Which of these statements is true about chemical equilibria in general? (1) At equilibrium, the rate of the forward reaction is equal to as the rate of the reverse reaction (2) Eq…

Which of these steps absorb energy and which releaseenergy? Part C Consider the

Which of these steps absorb energy and which releaseenergy? Part C Consider the lattice energy of any ioniccompound. What combination of ions and charges will produce thelargest (…

Which of these steps is important for handling acids and bases? You should never

Which of these steps is important for handling acids and bases? You should never use strong bases, like sodium hydroxide, no matter what the concentration Acids and bases should b…

Which of these transitions are possible for the electronic absorption of an atom

Which of these transitions are possible for the electronic absorption of an atom or molecule? A 1s electron in hydrogen is promoted to the 2p orbital b A 1s electron in hydrogen i…

Which of these would be the rate law for an E_2 reaction? a) rate k [RX] b) rate

Which of these would be the rate law for an E_2 reaction? a) rate k [RX] b) rate = k[RX][Nucleophile] c) rate = k [Rx]^2 d) rate = k[Nucleophile]^2 For Problems 13 and 14, conside…

Which of these would be the rate law for an S_N 1 reaction? a) rate = k [RX] b)

Which of these would be the rate law for an S_N 1 reaction? a) rate = k [RX] b) rate = k [RX] [Nucleophile] c) rate = k [RX]^2 d) rate = k [Nucleophile]^2 For Problems 13 and 14, …

Which of these would be the rate law for an S_N 1 reaction? a) rate = k [RX] b)

Which of these would be the rate law for an S_N 1 reaction? a) rate = k [RX] b) rate = k [RX] [Nucleophile] c) rate = k [RX]^2 d) rate = k [Nucleophile]^2 For Problems 13 and 14, …

Which on of the following molecules are not rotationally Raman active? a. H_2O b

Which on of the following molecules are not rotationally Raman active? a. H_2O b. NH_3 c. N_2 d. CH_4 e. CO_2 13) Which pair of atoms has the largest reduced mass? a. C-D b. D-D c…

Which one has the highest vibrational frequency among the single, double and tri

Which one has the highest vibrational frequency among the single, double and triple C-C bonds? Single bond Double bond Triple bond Undetermined The wavefunction for the ground sta…

Which one has two elements of unsaturation? C_6H_6 C_5H_10 C_9 H_16 C_4 H_10 Whi

Which one has two elements of unsaturation? C_6H_6 C_5H_10 C_9 H_16 C_4 H_10 Which one has the relationship of structural isomers? Which one is the conjugate base in the following…

Which one in FALSE regarding titrations The end point defined as the point where

Which one in FALSE regarding titrations The end point defined as the point where the indicator changes color. The want is the solution for which you already know the concentration…

Which one is FALSE regarding titrations? The end point is defined as the point w

Which one is FALSE regarding titrations? The end point is defined as the point where the indicator changes color. The titrant is the solution for which you already know the concen…

Which one is correct The phase diagram for CO2 has a triple point at -56.6 degre

Which one is correct The phase diagram for CO2 has a triple point at -56.6 degree C and 5.19 atm, and a critical point at 31.0 degree C and 73 atm. The solid and gas phase are in …

Which one is correct The phase diagram for CO2 has a triple point at -56.6 degre

Which one is correct The phase diagram for CO2 has a triple point at -56.6 degree C and 5.19 atm, and a critical point at 31.0 degree C and 73 atm. The solid and gas phase are in …

Which one is correct answer? The picture below shows two bulbs connected by a st

Which one is correct answer? The picture below shows two bulbs connected by a stopcock. The 6.00-L bulb contains nitricooide at a pressure of 0.500 atm, and the 1.50-L bulb contai…

Which one is more reactive in reactions of electrophilic aromatic substitution,

Which one is more reactive in reactions of electrophilic aromatic substitution, phenol, or sodium phenoxide? -Phenol is more reactive because the -OH group activates the aromatic …

Which one is more reactive in reactions of electrophilic aromatic substitution,

Which one is more reactive in reactions of electrophilic aromatic substitution, phenol, or sodium phenoxide? -Phenol is more reactive because the -OH group activates the aromatic …

Which one is not a factor that can be considered when choosing a indicator assoc

Which one is not a factor that can be considered when choosing a indicator associated with titrations? Indicator color The pH at the endpoint of the titration nears. The relative …

Which one is not an element below? a. K b. CacK_3 c. Mg d. Xe According to atomi

Which one is not an element below? a. K b. CacK_3 c. Mg d. Xe According to atomic theory, where elements react, four atoms combine in (choose one) a. a simple whole number ratio, …

Which one is not correct, and explain why. Thanks. Consider the reaction: H_2O(g

Which one is not correct, and explain why. Thanks. Consider the reaction: H_2O(g) + CO(g) H_2(g) + CO_2(g) Which of the following statements are true and which are false. At equil…

Which one is the best nucleophile among in SN reaction? a) H_2O b) OH ion c) SH

Which one is the best nucleophile among in SN reaction? a) H_2O b) OH ion c) SH ion d) H_2 S Which one would not be a good solvent for SN2 reaction? a) Acetone b) DMSO c) 1-Chloro…

Which one of the fallowing statements about strong acids is true? A) All strong

Which one of the fallowing statements about strong acids is true? A) All strong acids have II atoms bonded to electronegative oxygen atoms. B) The conjugate base of strong acid is…

Which one of the following 0.10 M aqueous solutions has the highest pH? LiOH KHC

Which one of the following 0.10 M aqueous solutions has the highest pH? LiOH KHCO_2 Nal NH_4I HI Which one of the following 0.10 M aqueous solutions has the lowest pH? HI HF KNO_2…

Which one of the following alcohols undergoes dehydration at the fastest rate on

Which one of the following alcohols undergoes dehydration at the fastest rate on being heated with sulfuric acid? 1-Pentanol 2-Pentanol 3-Pentanol Cyclopentanol 1-Methylcyclopenta…

Which one of the following alkenes can exhibit cis-trans isomerism Which one of

Which one of the following alkenes can exhibit cis-trans isomerism Which one of the following alkenes has a Z configuration? Another name for the alkenes is? enes olefins aliphati…

Which one of the following best characterizes the solution in the flask past the

Which one of the following best characterizes the solution in the flask past the equivalence point of the titration? Circle the correct answer. a) a solution of a strong acid b) a…

Which one of the following best describes the C(1)-C(2) bond in 1-butene? a. sp

Which one of the following best describes the C(1)-C(2) bond in 1-butene? a. sp3-sp3 &sigma b. sp2-sp2 &sigma c. sp2-sp3 &sigma d. sp2-sp &sigma e. &sigma + &a…

Which one of the following best represents the predicted approximate chemical sh

Which one of the following best represents the predicted approximate chemical shift and coupling for the hydrogen(s) indicated with the arrow? 1.00 ppm. singlet 2.10 ppm. singlet …

Which one of the following carrier games allows OC analyze to use the faster fro

Which one of the following carrier games allows OC analyze to use the faster from without increase in the theoretical plane height? (a) N_2 (b) H_2 (c) He (d) Ne Increasing the fl…

Which one of the following changes of state increases the entropy of the system?

Which one of the following changes of state increases the entropy of the system? Answer a. cooling a gas b. sublimation c. crystallization d. condensation e. freezing Which one of…

Which one of the following changes would alter the rate constant (k) for the rea

Which one of the following changes would alter the rate constant (k) for the reaction 2A + B products? a. increasing the concentration of A b. increasing the concentration of B c.…

Which one of the following changes would cause the number of collisions between

Which one of the following changes would cause the number of collisions between molecules of gas to DECREASE? Mark all correct choices. (a) Increasing the gas pressure while keepi…

Which one of the following choices describes most accurately the actual, interna

Which one of the following choices describes most accurately the actual, internal reaction temperature (in other words, the temperature of the reaction mixture inside the reaction…

Which one of the following combinations will give a buffer solution? a. 50 ml 1.

Which one of the following combinations will give a buffer solution? a. 50 ml 1.0 M HCl and 100 ml 1.0 M HOAc b. 80 ml 1.0 M NaOH and 100 ml 1.0 M HOAc c. 100 ml 1.0 M HCl and 80 …

Which one of the following compounds Is consistent with the following IR spectru

Which one of the following compounds Is consistent with the following IR spectrum? Mass spectrometry is primarily used to determine: molecular formula of a compound molecular weig…

Which one of the following compounds fits the C-13 NMR spectrum shown below? Whi

Which one of the following compounds fits the C-13 NMR spectrum shown below? Which of the following aromatic compounds reacts faster than benzene in electrophilic aromatic ruminat…

Which one of the following compounds give 5 with followed by water? What would b

Which one of the following compounds give 5 with followed by water? What would be product of the following reaction? Predict the product of the following reaction sequence A) I B)…

Which one of the following compounds has a lambda_max in its UV-visible spectrum

Which one of the following compounds has a lambda_max in its UV-visible spectrum with the longest wavelength? A) (4E, 7E)-dodeca-1, 4, 7-triene B) (2E, 4E, 6E)-dodeca-2, 4, 6-trie…

Which one of the following compounds is a non-electrolyte when dissolved in wate

Which one of the following compounds is a non-electrolyte when dissolved in water? Cu(NO3)2 CaCl2 HCl NaCH3CO2 CCl4 Given 1.0 M solutions of the following substances, which one wo…

Which one of the following compounds produces 4 ions per formula unit by dissoci

Which one of the following compounds produces 4 ions per formula unit by dissociation when dissolved in water? Are all these below aqueous and did I do them correctly? A) (NH4)2SO…

Which one of the following compounds will have the highest boiling point? A) CH_

Which one of the following compounds will have the highest boiling point? A) CH_3 CH_2 CH_3 CH_2 CH_5 B) CH_3 CH_2 CH_3 CH_2 OH C) CH_3 CH_2 CH_2 OCH_3 D) CH_3 CH_2 CH_2 Cl E) CH_…

Which one of the following compounds would produce an acidic solution when disso

Which one of the following compounds would produce an acidic solution when dissolved l Na_2O CaO MgO CO_2 Sr O Which one of the following is a metal? greaterthanorequalto S Br Pb …

Which one of the following configuration s represents an alkaline earth elements

Which one of the following configuration s represents an alkaline earth elements? Which one of the atoms in the set: O, F, Li, I, K has the largest first ionization energy? Which …

Which one of the following descriptions relating to nuclear reactions is correct

Which one of the following descriptions relating to nuclear reactions is correct? Answer                                                   a.            The number of electrons re…

Which one of the following dienes is most stable? CH_3CH-CHCH-CHCH_3 CH_3CH-CHCH

Which one of the following dienes is most stable? CH_3CH-CHCH-CHCH_3 CH_3CH-CHCH_3CH-CH_2 CH_3-CHCH_2CH_2CH-CH_2 CH_2-CHCH_3CH_2CH-CH_2 CH_2CHCH(CH_3)CH-CH_2 CH_3CH-C-CHCH_2CH_3 W…

Which one of the following elementS has the highest density? A)Cr B) Ni C)Os D)

Which one of the following elementS has the highest density? A)Cr B) Ni C)Os D) Ta E) cannot be determined 4. Which transition element has the highest melting point? A)Fe B) V C) …

Which one of the following elements has the highest electron affinity? Li K Ar M

Which one of the following elements has the highest electron affinity? Li K Ar Mg CI Which sublevel has the lowest energy? 2s 3p 4p 4s 2p What is the lewis symbol of the fluoride …

Which one of the following elements is a metal that reacts violently with water

Which one of the following elements is a metal that reacts violently with water to produce hydrogen gas? chlorine helium aluminum potassium boron magnesium Which one of the follow…

Which one of the following elements is most likely to form a 2+ ion? A. calcium

Which one of the following elements is most likely to form a 2+ ion? A. calcium B. carbon C. fluorine D. oxygen E. sodium An iron (li) ion has: A. 24 electrons and a charge of 2+ …

Which one of the following elements would be incorrectly represented as a Lewis

Which one of the following elements would be incorrectly represented as a Lewis symbol if the number of valence electrons in parentheses were placed around it? a. Na (1) b. C (4) …