Chemistry concepts and calculations

1) When aqueous solutions of K 2 SO 4 and Pb(NO 3 ) 2 are combined, PbSO 4 preci

1) When aqueous solutions of K2SO4 and Pb(NO3)2 are combined, PbSO4 precipitates. Calculate the mass, in grams, of the PbSO4 produced when 2.44 mL of 0.175 M Pb(NO3)2 and 4.28 mL …

1) When calculating the density of a liquid you measure 8.2 mL in a graduated cy

1) When calculating the density of a liquid you measure 8.2 mL in a graduated cylinder with markings every 1 mL and measure the mass on a balance 9.548g. What is the density of th…

1) When heated, KClO3 decomposes into KCl and O2. 2KCl 3 ---> 2KCl +3O 2 If this

1) When heated, KClO3 decomposes into KCl and O2. 2KCl3 ---> 2KCl +3O2 If this reaction produced 42.0 g of KCl, how much O2 was produced (in grams)? 2) Balance the following eq…

1) When insulin binds the insulin receptor, the IRS protein: phosphorylates the

1) When insulin binds the insulin receptor, the IRS protein: phosphorylates the insulin receptor binds to the phosphorylated beta-chains of the insulin receptor binds the G-alpha …

1) When ionic solids dissolve in water, they produce soluble aqueous cations and

1) When ionic solids dissolve in water, they produce soluble aqueous cations and anions. For example, adding MgBr2 solids to water will produce ions according to the dissolution r…

1) When writing out an algorithm please give a high level description/summary. 2

1) When writing out an algorithm please give a high level description/summary. 2) When giving a dynamic programming algorithm, make sure to give the recurrence equation for your a…

1) Where does most of the mass of an atom come from? 2) What do you predict the

1) Where does most of the mass of an atom come from? 2) What do you predict the trend in atomic mass will be going down a group? 3) Across a period? 4) Will this trend be the same…

1) Where would you expect N2 to fit on this graph? a) Its curve will be just bel

1) Where would you expect N2 to fit on this graph? a) Its curve will be just below that of He b) Its curve will be just above of that of CH4 c) Its curve will be just above that o…

1) Which Compound 2-bromo-2-methylpropane or 2-chloro-2-methylpropane, should re

1) Which Compound 2-bromo-2-methylpropane or 2-chloro-2-methylpropane, should react faster in an Sn1 experiment? Why? 2) Which Compound, 2-bromo-2-methylpropane or 2-bromopropane,…

1) Which amino acid side chains that can act as an H-donor and acceptor at all p

1) Which amino acid side chains that can act as an H-donor and acceptor at all pH values (0-14)? 2)Which amino acid is commonly found in a beta or reverse turn? 3) Which amino aci…

1) Which amino acid side chains that can act as an H-donor and acceptor at all p

1) Which amino acid side chains that can act as an H-donor and acceptor at all pH values (0-14)? 2)Which amino acid is commonly found in a beta or reverse turn? 3) Which amino aci…

1) Which compound will have the broadest IR absorption in the 3500 - 2500 cm -1

1) Which compound will have the broadest IR absorption in the 3500 - 2500 cm-1 region? 2)Which compound is expected to have an IR inactive multiple bond? 3)The IR spectrum of an u…

1) Which country was responsible for annexing territory from Bolivia, making it

1) Which country was responsible for annexing territory from Bolivia, making it a land-locked nation? 2) The international financial institution responsible for providing credit t…

1) Which group in the periodic table will have the most negative electron affini

1) Which group in the periodic table will have the most negative electron affinity in each row? why? 2) write a chemical equation to represent the following processes (include sta…

1) Which if the following will be investigated as part of this experiment? (choo

1) Which if the following will be investigated as part of this experiment? (choose all that apply) - Cell potential of simple electrochemical cells. - Cell potential between cells…

1) Which is a primary advantage of inheritance? A. Classes receive characteristi

1) Which is a primary advantage of inheritance? A. Classes receive characteristics of parent classes B. The same class can do different things in different circumstances C. A clas…

1) Which is a spectator ion involved in the reaction of K2CrO4(aq) and Ba(NO3)2(

1) Which is a spectator ion involved in the reaction of K2CrO4(aq) and Ba(NO3)2(aq)? A.There are no spectator ions B. Ba2+ C. CrO42- D. K+ E. NO2- 2)Which one of the following is …

1) Which is correct considering the magnitude of lattice energy? a) AlCl 3 > AlB

1) Which is correct considering the magnitude of lattice energy? a) AlCl3 > AlBr3 b) CaCl2 > CaF2 c)RbI > RbCl d) FeCl2 > FeCl3 2) In forming an ionic bond: a) electro…

1) Which knob on the Spec 20 adjusts wavelength? the wavelength control- is this

1) Which knob on the Spec 20 adjusts wavelength? the wavelength control- is this correct? Which knob adjusts the value of percent transmittance? the transmittance/absorbance contr…

1) Which of the curves seems to have the most vertical line around the equivalen

1) Which of the curves seems to have the most vertical line around the equivalence point? Explain why. (If you suspect that your data are inaccurate, explain which one you think s…

1) Which of the following alcohols will react most rapidly with the Lucas reagen

1) Which of the following alcohols will react most rapidly with the Lucas reagent (HCl, ZnCl2)? A) (CH3)3COH B) CH3CH2CH2CH2OH C) CH3CHOHCH2CH3 D) (CH3)2CHCH2OH The answer is A bu…

1) Which of the following aqueous Cs 3 PO 4 (MM = 494 g/mol) solutions each with

1) Which of the following aqueous Cs3PO4 (MM = 494 g/mol) solutions each with a density of 1.1g/mL will have the higher molal concentration? Show work a) 1M Cs3PO4 b) 1 m Cs3PO4 c…

1) Which of the following aqueous solutions has the highest boiling point (assum

1) Which of the following aqueous solutions has the highest boiling point (assume 100% dissociation for all soluble ionic compounds)? A)0.10m AI(NO B) 0.11m Na:So. Co.15m K:CO, D)…

1) Which of the following best describes the given reaction: a) Displacement rea

1) Which of the following best describes the given reaction: a) Displacement reaction b) Acid-Base reaction c) Combination reaction d) Decomposition reaction e) Precipitation reac…

1) Which of the following compounds exhibits optical isomerism? Which of the fol

1) Which of the following compounds exhibits optical isomerism? Which of the following compounds exhibits optical isomerism? CH3-CH2-CBr2-CH3 2) Based on the molecular formula, de…

1) Which of the following compounds will have the highest molar solubility in pu

1) Which of the following compounds will have the highest molar solubility in pure water? Which of the following compounds will have the highest molar solubility in pure water? Fe…

1) Which of the following compounds will undergo Friedel-Crafts alkylation with

1) Which of the following compounds will undergo Friedel-Crafts alkylation with (CH3)3CCl, AlCl3 most rapidly? A) acetophenone B) iodobenzene C) anisol D) Phenol 2) In electrophil…

1) Which of the following conditions would cause red blood cells to burst due to

1) Which of the following conditions would cause red blood cells to burst due to excess water passing through the plasma membrane? Explain a) Adding an isotonic solution to the ce…

1) Which of the following describes the relationship between standard free energ

1) Which of the following describes the relationship between standard free energy and spontaneity? A-The more positive the value of ?G?, the more spontaneous the process. B-The mo…

1) Which of the following elements forms stable compounds containing long chains

1) Which of the following elements forms stable compounds containing long chains of the covalently bonded atoms? a) N b) P c) Cl d) C e) S 2) Which of the following molecules has …

1) Which of the following gases is unsuitable for use as a GC carrier gas?(10 )

1) Which of the following gases is unsuitable for use as a GC carrier gas?(10 ) a. nitrogen b. helium c. oxygen 2) Which type of column has the greater efficiency and resolution, …

1) Which of the following is NOT valid reasoning for these results: A student be

1) Which of the following is NOT valid reasoning for these results: A student begins with 5.00 g of an unknown mixture and recovers 2.91 g of copper sulfate and 2.58 g of salicyli…

1) Which of the following is a substitution reaction? 2) What is the nucleophile

1) Which of the following is a substitution reaction? 2) What is the nucleophile in the following reaction? 3) What is the leaving group in the following reaction? 4) Which of the…

1) Which of the following is a true statement a. all chiral molecules possess a

1) Which of the following is a true statement a. all chiral molecules possess a plane of symmetry b. all achiral molecules are meso c. all molecules which possess a single chirali…

1) Which of the following is a true statement a. all chiral molecules possess a

1) Which of the following is a true statement a. all chiral molecules possess a plane of symmetry b. all achiral molecules are meso c. all molecules which possess a single chirali…

1) Which of the following is a true statement about chemical equilibrium in gene

1) Which of the following is a true statement about chemical equilibrium in general: a) There is only one set of equilibrium concentration that equals the Kc value. b) At equilibr…

1) Which of the following is a wedge and dash projection for the following Newma

1) Which of the following is a wedge and dash projection for the following Newman projection? 2) What is the eclipsing cost of Br and H if the energy difference between the stagge…

1) Which of the following is most likely to be an ionic compound? A) CaCl 2 B) S

1) Which of the following is most likely to be an ionic compound? A) CaCl2 B) SO2 C) CO2 D) OF2 E) CS2 2) If a hydrogen tom and a helium atom are traveling at the same speed, A) t…

1) Which of the following is the weakest oxidizing agent? Question options: a) F

1) Which of the following is the weakest oxidizing agent? Question options: a) Fe3+(aq) b) ClO2(g) c) I2(s) d) Fe(s) e)H2O2(aq) 2)A galvanic cell consists of one half-cell that co…

1) Which of the following is true for the sublimation of a solid substance? ? S

1) Which of the following is true for the sublimation of a solid substance? ?S = 0 and ?H = 0. ?S > 0 and ?H < 0. ?S < 0 and ?H < 0. ?S > 0 and ?H > 0. ?S < 0…

1) Which of the following is(are) involved in intermolecular attractions between

1) Which of the following is(are) involved in intermolecular attractions between a drug and a protein receptor? Hydrogen bonds. nonpolar hydrophobic interactions Ionic bonds. ion-…

1) Which of the following is/are true? An abstract data type: I. Captures a data

1) Which of the following is/are true? An abstract data type: I. Captures a data representation; II. Defines the operations that are allowed on its data; III. Replaces structured …

1) Which of the following liquids would have the highest viscosity at 25degC A)

1) Which of the following liquids would have the highest viscosity at 25degC A) CH3OCH3, B) CH3CL2, C) C2H5OH, D) CH3Br E) HOCH2CH2OH 2) What is the molaity of Ci^-1 ions in 5.621…

1) Which of the following macromolecules fuels almost all living cells? proteins

1) Which of the following macromolecules fuels almost all living cells? proteins 2) ________ are composed of amino acids. 3) 2 multiple choice questions and 1 is the questions in …

1) Which of the following macromolecules fuels almost all living cells? proteins

1) Which of the following macromolecules fuels almost all living cells? proteins 2) ________ are composed of amino acids. 3) 2 multiple choice questions and 1 is the questions in …

1) Which of the following makes it difficult to monobrominate aniline: A) The ba

1) Which of the following makes it difficult to monobrominate aniline: A) The basicity of the N interferes in a Lewis acid/base sense. B) The ring is too deactivated due to the el…

1) Which of the following makes it difficult to monobrominate aniline: A)The rin

1) Which of the following makes it difficult to monobrominate aniline: A)The ring is too activated due to the electron donation of the N via its lone pair. B)The basicity of the N…

1) Which of the following memories are possible? Which are reasonable? Circle al

1)      Which of the following memories are possible? Which are reasonable? Circle all that apply? Please explain your answers. (P = possible, R = reasonable) a) 9-bit address, 51…

1) Which of the following methods would be an appropriate way to distinguish bet

1) Which of the following methods would be an appropriate way to distinguish between magnesium metal and sodium metal in the lab? Which of the following methods would be an approp…

1) Which of the following polymers are made by an addition polymerization reacti

1) Which of the following polymers are made by an addition polymerization reaction? a) Poly(sulfur) b) Proteins, RNA and DNA c) Polyesters d) Nylon e) Poly(ethylene) 2) Which one …