Chemistry concepts and calculations

1.True or false about an acid base buffer solution a) it can be prepared by comb

1.True or false about an acid base buffer solution a) it can be prepared by combining a strong acid with a salt of its conjugate base b) it can be prepared by combining a weak aci…

1.Under Standard conditions, equilibrium concentrations are 9.6x10^-2M glucose-6

1.Under Standard conditions, equilibrium concentrations are 9.6x10^-2M glucose-6-phosphate and 5.5x10^-3M glucose-1-phosphate. What is the delta G for the conversion of glucose-1-…

1.Under Standard conditions, equilibrium concentrations are 9.6x10^-2M glucose-6

1.Under Standard conditions, equilibrium concentrations are 9.6x10^-2M glucose-6-phosphate and 5.5x10^-3M glucose-1-phosphate. What is the delta G for the conversion of glucose-1-…

1.Under Standard conditions, equilibrium concentrations are 9.6x10^-2M glucose-6

1.Under Standard conditions, equilibrium concentrations are 9.6x10^-2M glucose-6-phosphate and 5.5x10^-3M glucose-1-phosphate. What is the delta G for the conversion of glucose-1-…

1.Use the activity series from your text to determine whether tin will dissolve

1.Use the activity series from your text to determine whether tin will dissolve in a 1.0M acid solution (a solution of H+ ions) according to the following equation. Explain your a…

1.Use the activity series from your text to determine whether tin will dissolve

1.Use the activity series from your text to determine whether tin will dissolve in a 1.0M acid solution (a solution of H+ ions) according to the following equation. Explain your a…

1.Use the structure below to answer the following questions. Note: the structure

1.Use the structure below to answer the following questions. Note: the structure below does not reflect its true 3-D shape. You should add lone pairs as needed so that each non-hy…

1.Using the absorbance of the spinach extract and the equation of the trendline,

1.Using the absorbance of the spinach extract and the equation of the trendline, determine the concentration of the extract solution. Report the concentration in moles/L (M). 2. C…

1.Using the enthalpies of formation given below, calculate H° rxn in kJ, for the

1.Using the enthalpies of formation given below, calculate H°rxn in kJ, for the following reaction. Report your answer to two decimal places in standard notation. H2S(g) + 2O2(g) …

1.Various pesticides and solvents often find their way into open dumps. Based on

1.Various pesticides and solvents often find their way into open dumps. Based on airborne concentrations of a certain solvent vapor near a dump, you have calculated that the conce…

1.What concentration of carbonate ion is required to begin the precipitation of

1.What concentration of carbonate ion is required to begin the precipitation of strontium ion from a solution containing 0.050 M strontium ion? 2. What is the molar solubility of …

1.What data types would you use for the following fields: price, phone number, s

1.What data types would you use for the following fields: price, phone number, street address, zip code, and directions for using a product? Give your reasoning for selecting the …

1.What fraction of the volume of each corner atom is actually within the volume

1.What fraction of the volume of each corner atom is actually within the volume of a face-centred cubic unit cell? Select one: A. 1/16 B. 1/2 C. 1/4 D. 1/8 E. 1 2. On a phase diag…

1.What is a more accurate term for a trickling filter? a) Water Filter b) Second

1.What is a more accurate term for a trickling filter? a) Water Filter b) Secondary Clarifier c) Biological Bed d) Sludge Tower 2. What is the approximate content of BoD and Suspe…

1.What is partial pressure? d. Partial pressure is the pressure of a single gas

1.What is partial pressure? d. Partial pressure is the pressure of a single gas in a mixture of two or more gases. 2. Which of the following gases account for 78% of the pressure …

1.What is the boiling point of pure toluene according to the boiling point diagr

1.What is the boiling point of pure toluene according to the boiling point diagram? 2.What is the initial boiling point of a solution that contains 70% toluene and 30% benzene? 3.…

1.What is the charge on the molecule at the isoelectric point? 2. (2) At the iso

1.What is the charge on the molecule at the isoelectric point? 2. (2) At the isoelectric point, is each of the sites (labeled A, B, and C) protonated or unprotonated? Site A: Pron…

1.What is the chemical formula for the compound formed between tin(II) and iodin

1.What is the chemical formula for the compound formed between tin(II) and iodine? 2.What is the name of the compound with the chemical formula Rb2Se? Spelling counts! 3.What is t…

1.What is the concentration in mM of a solution that contains 100mL of water and

1.What is the concentration in mM of a solution that contains 100mL of water and 60mg of acetic acid? (molecular weight of acetic acid is 60g/mol) _____________ 2. The pKa of acet…

1.What is the difference between the following presentation purposes: Inform, Pe

1.What is the difference between the following presentation purposes: Inform, Persuade, Prepare, and Tell a Story? 2. What questions might you ask to help you define the purpose a…

1.What is the equilibrium constant expression for the following reaction: PtCl 4

1.What is the equilibrium constant expression for the following reaction: PtCl42?(aq)?Pt2+(aq) + 4Cl?(aq) Choose from the list below and enter the letters alphabetical order. (e.g…

1.What is the function of ethanol in this aldol condensation? A.Ethanol is the s

1.What is the function of ethanol in this aldol condensation? A.Ethanol is the solvent for the reaction. B.None of the answers shown are correct. C.Ethanol is used to remove a pro…

1.What is the hybridization type of the central B atom in a BF3 molecule? is sp2

1.What is the hybridization type of the central B atom in a BF3 molecule? is sp2 correct? 2. How many non-bonding electron pairs are there at one O atom of the Lewis structure of …

1.What is the maximum number of hydrogen bonds that may be formed between 2 wate

1.What is the maximum number of hydrogen bonds that may be formed between 2 water molecules? 2.What is the key substance that determines the extent and kinds of life in a body of …

1.What is the maximum number of hydrogen bonds that may be formed between 2 wate

1.What is the maximum number of hydrogen bonds that may be formed between 2 water molecules? 2.What is the key substance that determines the extent and kinds of life in a body of …

1.What is the molar solubility of CaCO3 (Ksp = 2.5 x 10 -9 ) in an aqueous solut

1.What is the molar solubility of CaCO3 (Ksp = 2.5 x 10-9) in an aqueous solution where the carbonate ion concentration is 0.30 M at 25°C? 2. Two solutions are mixed; one solution…

1.What is the molarity of a sodium chloride solution, if 6.87 g of NaCl are diss

1.What is the molarity of a sodium chloride solution, if 6.87 g of NaCl are dissolved in enough water to make 0.200 L of solution? 2. What is the molality of a sodium chloride sol…

1.What is the molarity of a solution prepared by diluting 25 mL of 2.0 M HCl wit

1.What is the molarity of a solution prepared by diluting 25 mL of 2.0 M HCl with enough water to make 250 mL of solution? 2.The chemical 5-amino-2,3-dihydro-1,4-phthalazinedione,…

1.What is the name of the ionic compound BaCO3? Enter the compound name. 2.What

1.What is the name of the ionic compound BaCO3? Enter the compound name. 2.What is the molecular formula for ammonium nitrate? 3.Li2CO3, an antidepressant Spell out the full name …

1.What is the pH of 0.15 M HI and the pH of 0.15 M H 2 S? 2. An example of P in

1.What is the pH of 0.15 M HI and the pH of 0.15 M H2S? 2. An example of P in its maximum and minimum oxidation states is: a)white phosphorus and red phosphorus b)P4O10 and PH3 c)…

1.What is the pH of a 0.55M aqueous solution of hypobromous acid, HBrO, at 25?C

1.What is the pH of a 0.55M aqueous solution of hypobromous acid, HBrO, at 25?C (Ka=2.0x10-9) Answer) 4.48 2.What is the pH of a solution that contains 0.25M benzoic acid, HC7H5O2…

1.What is the reason that the product of the electrophilic addition to asymmetri

1.What is the reason that the product of the electrophilic addition to asymmetric alkene occurs regioselectively, the electrophilic component of the reagent adds to the least subs…

1.What is the reason that the product of the electrophilic addition to asymmetri

1.What is the reason that the product of the electrophilic addition to asymmetric alkene occurs regioselectively, the electrophilic component of the reagent adds to the least subs…

1.What is the relationship between crystal symmetry (point group) and unit cell

1.What is the relationship between crystal symmetry (point group) and unit cell symmetry? 2.What is the relationship between crystal symmetry (point group) and lattice symmetry? 3…

1.What is the transmission rate of Ethernet LANs? What are some of the physical

1.What is the transmission rate of Ethernet LANs? What are some of the physical media that Ethernet can run over? 2. Why will two ISPs at the same level of the hierarchy often pee…

1.What is “dialysis?” 2.Large quantities of water are used in dialysis. Explain

1.What is “dialysis?” 2.Large quantities of water are used in dialysis. Explain the role of water and a semi-permeable membrane in dialysis. Use the terms: hypotonic, hypertonic ,…

1.What is “quality”? 2.What are the functions of IEEE and ISO in development and

1.What is “quality”? 2.What are the functions of IEEE and ISO in development and quality assurance? 3.What is a software product? Please explain in detail the following: a. Generi…

1.What mass of oxygen is necessary to burn 106.9 g of propane in a balanced fash

1.What mass of oxygen is necessary to burn 106.9g of propane in a balanced fashion? 2.What is the theoretical yield of water, in grams? 3.How many grams of oxygen does it take to …

1.What mode of decay is probable for 41/18 Ar ? What mode of decay is probable f

1.What mode of decay is probable for 41/18 Ar ? What mode of decay is probable for ? a.electron capture b. beta emission C.positron emission D.alpha emission 2. The standard cell …

1.What pressure will 2.6 x10 23 molecules of H 2 exert in a 3.9 Lcontainer at 45

1.What pressure will 2.6 x1023 molecules of H2 exert in a 3.9 Lcontainer at 45°C? 2.What volume will 0.780moles of He occupy at STP? 3.How many molecules ofCO2 are contained in a …

1.What product of the reaction below reacts with starch? Hint: an easy test for

1.What product of the reaction below reacts with starch? Hint: an easy test for the presence of starch in bread is to palce a drop of iodine solution on a breadslice and observe t…

1.What reactants are required to form an ester? A. a carboxylic acid and an alde

1.What reactants are required to form an ester? A.a carboxylic acid and an aldehyde B.an aldehyde and an alcohol C.a carboxylic acid and an alcohol D.a carboxylic acid and an alke…

1.What reactants are required to form an ester? A. a carboxylic acid and an alde

1.What reactants are required to form an ester? A.a carboxylic acid and an aldehyde B.an aldehyde and an alcohol C.a carboxylic acid and an alcohol D.a carboxylic acid and an alke…

1.What specific compound would the silica gel most likely remove from your final

1.What specific compound would the silica gel most likely remove from your final product? Synthesis and Dehydrohalogenalol lD The present experiment is a two-reaction exercise. Yo…

1.What values of x , y and z balance the equation: x SO 2 + y H + + Cr 2 O 7 2–

1.What values of x,  y and z balance the equation: x SO2    +   y H+   +    Cr2O72– 3 SO42–  + z Cr3+ +   H2O ? 2.What is the stoichiometric ratio of solid phosphorus (P) to chlor…

1.What volume of 0.10M HCl should be needed to titrate .136 g Na2CO3 according t

1.What volume of 0.10M HCl should be needed to titrate .136 g Na2CO3 according to the reaction equation: Na2CO3(aq) + 2HCl(aq) ? 2NaCl(aq) + H2O(l) + CO2(g) 2.Atmospheric carbon d…

1.When 35.0 mL of 1.43 M NaOH at 22.0 o C are neutralized by 35.0 mL of HCl also

1.When 35.0 mL of 1.43 M NaOH at 22.0oC are neutralized by 35.0 mL of HCl also at 22.0oC in a coffee cup calorimeter, the temperature of the final solution rises to 31.29oC. The s…

1.When CO(g) reacts with NO(g) to form CO 2 (g) and N 2 (g) , 373 kJ of energy a

1.When CO(g) reacts with NO(g) to form CO2(g) and N2(g) , 373 kJ of energy are evolved for each mole of CO(g) that reacts. Write a balanced thermochemical equation for the reactio…

1.When a 0.528 g sample of a compound containing only carbon, hydrogen, and oxyg

1.When a 0.528 g sample of a compound containing only carbon, hydrogen, and oxygen is burned, 0.306 g of water and 0.815 g of carbon dioxide are formed. What is the empirical form…

1.When a 8.192g sample of bluish-green crystals of hydrated nickel(II)sulfate is

1.When a 8.192g sample of bluish-green crystals of hydrated nickel(II)sulfate is heated, all of the water of hydration is lost leaving 4.826g of anhydrous nickel(II)sulfate. Write…