Chemistry concepts and calculations
117302 questions • Page 2166 / 2347
a. Write a balanced equation for the reaction of trisilicate ion, Si3O84-, with
a. Write a balanced equation for the reaction of trisilicate ion, Si3O84-, with H+. b. Which od the anacid components will exhibit more than a one to one mole ratio, when titrated…
a. Write a balanced equation for this reaction b. Equilibrium Expression c. At 3
a. Write a balanced equation for this reaction b. Equilibrium Expression c. At 319 degrees Celsius, the pressure is 1728 Pa. Calculate the equilibrium constant at that temperature…
a. Write a method createArithmeticSeq that prompts the user to input two number,
a. Write a method createArithmeticSeq that prompts the user to input two number, first and diff. The method then creates a one-dimensional array of 16 elements ordered in an arith…
a. Write a program named DEMOJOBS for Harold’s Home Services. The program should
a. Write a program named DEMOJOBS for Harold’s Home Services. The program should instantiate several Job objects and demonstrate their methods. The Job class contains four data …
a. Write an equation for the formation of HCl(g) from its elements in its standa
a. Write an equation for the formation of HCl(g) from its elements in its standard states. b. Find Hf for HCl(g) from Appendix IVB in the textbook. c. Write an equation for the fo…
a. Write and balance the reaction between the magnesium ion, the bicarbonate ion
a. Write and balance the reaction between the magnesium ion, the bicarbonate ion and heat. b. Write and balance the scale removal reaction involving the scale generated in the abo…
a. Write and balance the reaction between the magnesium ion, the bicarbonate ion
a. Write and balance the reaction between the magnesium ion, the bicarbonate ion and heat. b.Write and balance the scale removal reaction involving the scale generated in the abov…
a. Write the net equations for : HCl (aq) + NaOH(aq) HCl (aq) +NaOH (s) HCl(aq)+
a. Write the net equations for : HCl (aq) + NaOH(aq) HCl (aq) +NaOH (s) HCl(aq)+NaOH(aq) b. what is the relationship among the chemical equations? can any two be combined to form …
a. You are conducting an experiment where you need the volume of a box; you take
a. You are conducting an experiment where you need the volume of a box; you take the length, height, and width measurements and then multiply the values together to find the volum…
a. You are tasked with deciding how to remediate a site where the groundwater ha
a. You are tasked with deciding how to remediate a site where the groundwater has beencontaminated with trichloroethylene (TCE). If conditions are right, the growth of certain gro…
a. a 14 cm^3 sample of lake water is found to have 176.1 ng As. What is concentr
a. a 14 cm^3 sample of lake water is found to have 176.1 ng As. What is concentration of arsenic in the sample in parts per billion assuming that the density of the lake water is …
a. a compound weighing 5.714 mg produced 14.414 mgCO 2 (44.010 g/mol) & 2.529 mg
a. a compound weighing 5.714 mg produced 14.414 mgCO2 (44.010 g/mol) & 2.529 mg of H20(18.015 g/mol) on combustion. Find the weight % of C (12.0107 g/moland H (1.00704 g/mol) …
a. acetal e. 0. men a Celta C. nermi Ketal a. Keta OH HO 7. The following compou
a. acetal e. 0. men a Celta C. nermi Ketal a. Keta OH HO 7. The following compound is? OH OH a. alpha b. beta d. delta e. not a.-d C. gamma 8. Which compound is galactose? OH HO O…
a. an ideal gas is in a closed container (with a fixed pressure) at an initial v
a. an ideal gas is in a closed container (with a fixed pressure) at an initial volume of 1L and temperature of 300K, doubling the temperature of the container will do what? b.the …
a. an ideal gas is in a closed container (with a fixed pressure) at an initial v
a. an ideal gas is in a closed container (with a fixed pressure) at an initial volume of 1L and temperature of 300K, doubling the temperature of the container will do what? b.the …
a. aniline b. methylamiiie n stron- 99. Calculate aclat tepH of a 0.20-M C,H,NH,
a. aniline b. methylamiiie n stron- 99. Calculate aclat tepH of a 0.20-M C,H,NH, solution (K 5.6× 10-4). Calculate culate the plH of a 0.os0-M (C,Hs),NH solution (K, 1.3 × 10-3). …
a. b. c. Looking at both the Ksp and Kf data given in Section 4.2, what reaction
a. b. c. Looking at both the Ksp and Kf data given in Section 4.2, what reactions List all species present in a 1.0 M ammonia solution. Is the pH of the ammonia solution acidic or…
a. caculate the amount of heat (kcal) release when 50.0 g ofwater at 100 o C hit
a. caculate the amount of heat (kcal) release when 50.0 g ofwater at 100oC hits the skin and cool to a bodytemperture of 370C. b. caluclate the amount of heat (kcal) releasedwhen …
a. differentiate between weak and strong (acids and bases) from an equilibrium p
a. differentiate between weak and strong (acids and bases) from an equilibrium perspective b. If your answer in part (a) involves equilibrium, which side (reactants or products) d…
a. each your four runs, plot the recorded absorbance versus time data with a gra
a. each your four runs, plot the recorded absorbance versus time data with a graphing of program. For each run, determine the half-life of the crystal violet in seconds. If possib…
a. formula of the solid cobalt chloride salt b. what things , including complexe
a. formula of the solid cobalt chloride salt b. what things , including complexes exist in solution when cobalt chloride is dissolved in water? in ethanol? c. Why does Cu^2+ molar…
a. if a 0.1500M NaOH solution was used in this titration, how many milimoles of
a. if a 0.1500M NaOH solution was used in this titration, how many milimoles of acid were involved in the first equivalence point. b. if a 0.1500M NaOH solution was used in this t…
a. molarity of NaOH? Equivalent Weight of an Unknown I. Data Record data in ink
a. molarity of NaOH? Equivalent Weight of an Unknown I. Data Record data in ink with units. mH0.5668 A. Molarity of NaOH B. Unknown Acid Code # C. Mass of Unknown Acid 486 1. Mass…
a. pH of weak acid = 1/2(pka-logC) pka1 = -log(7.5*10^-3) = 2.12 = 1/2(2.12-log0
a. pH of weak acid = 1/2(pka-logC) pka1 = -log(7.5*10^-3) = 2.12 = 1/2(2.12-log0.1) pH = 1.56 b. no of mol of H3PO4 = 30*0.1 = 3 mmol no of mol of KOH = 15*0.2…
a. phenol b. o-ethyltoulene c. 3-chloroaniline d. p-nitrobenzoic acid Solution a
a. phenol b. o-ethyltoulene c. 3-chloroaniline d. p-nitrobenzoic acid
a. phenol b. o-ethyltoulene c. 3-chloroaniline d. p-nitrobenzoic acid Solution a
a. phenol b. o-ethyltoulene c. 3-chloroaniline d. p-nitrobenzoic acid
a. relationship between: i. A and B ii. A and C iii. A and D iv. A and E b. The
a. relationship between: i. A and B ii. A and C iii. A and D iv. A and E b. The configuration of the carbon bonded to the OH group in alcohol D is i. E configuration ii. Z configu…
a. the reaction is at equilibrium. b. the reaction will continue to make more pr
a. the reaction is at equilibrium. b. the reaction will continue to make more products. c. the reaction will consume products and make reactants. d. the reaction will release heat…
a. the sun b. cellular respiration c. digestion d. entropy 5. During cellular re
a. the sun b. cellular respiration c. digestion d. entropy 5. During cellular respiration, your cells break down glucose into CO2 and H2O. This is an example of a. biosynthesis b.…
a. titration of 27.9 mL of a solution of the weak base aniline, C 6 H 5 NH 2 , r
a. titration of 27.9 mL of a solution of the weak base aniline, C6H5NH2, requires 28.64 mL of 0.160 M HCl to reach the equivalence point. C6H5NH2(aq) + H3O+(aq) C6H5NH3+(aq) + H2O…
a. what is the average CPI for each of the program b.what is the clock rate for
a. what is the average CPI for each of the program b.what is the clock rate for P2 and P3 that would reduce the execution time on P2 and P3 to that of P1? 5. The below table shows…
a. write the reaction that occurs when ammonia and acetic acid are mixed. b. Alt
a. write the reaction that occurs when ammonia and acetic acid are mixed. b. Although ammonia and acetic acid are weak electrolytes, a mixture of these two solutions behaves as a …
a. write the reaction that occurs when ammonia and acetic acid are mixed. b. Alt
a. write the reaction that occurs when ammonia and acetic acid are mixed. b. Although ammonia and acetic acid are weak electrolytes, a mixture of these two solutions behaves as a …
a.) A certain reaction is second order in oxygen. By whatfactor will its rate in
a.) A certain reaction is second order in oxygen. By whatfactor will its rate increase if the oxygen concentration isincreased by a factore of 2.72? b.) Consider the reaction 2NH3…
a.) A standard displacement reaction is when an active metal displaces hydrogen
a.) A standard displacement reaction is when an active metal displaces hydrogen from an acidic solution. A chunk of calcium metal of mass 18.0 g is placed in a beaker of dilute hy…
a.) After a dose, the concentration of medication in the blood declines due to m
a.) After a dose, the concentration of medication in the blood declines due to metabolic processes. The half-life of a medication is the time required after an initial dosage for …
a.) After a dose, the concentration of medication in the blood declines due to m
a.) After a dose, the concentration of medication in the blood declines due to metabolic processes. The half-life of a medication is the time required after an initial dosage for …
a.) An aqueous solution of barium hydroxide is standardized by titration with a
a.) An aqueous solution of barium hydroxide is standardized by titration with a 0.177 M solution of nitric acid. If 25.8 mL of base are required to neutralize 10.4 mL of the acid,…
a.) An ideal gas expands from a volume of 0.006 m^3 to 0.016 m^3 at a constant p
a.) An ideal gas expands from a volume of 0.006 m^3 to 0.016 m^3 at a constant pressure of 2.026 x10^5 Nm^-2. Find the heat required if the change in internal energy is 418 J. b.)…
a.) Calculate the E°cell for the following equation. Use these standard potentia
a.) Calculate the E°cell for the following equation. Use these standard potentials . ( https://sites.google.com/site/chempendix/potentials ) b.)A galvanic (voltaic) cell consists…
a.) Compare and contrast simple distillation with another common distillation te
a.) Compare and contrast simple distillation with another common distillation technique: fractional distillation. b.)How would your refractive index data change if you used fracti…
a.) Consider the following equilibrium at 395K NH 4 HS(s) = NH 3 (g) +H 2 S (g)
a.) Consider the following equilibrium at 395K NH4HS(s) = NH3(g) +H2S (g) The partial pressure of each gas at equilibrium is .0265 atm.Calculate Kp and Kc for the …
a.) Draw an energy-level diagram for the valence molecular orbitals of CO. Inclu
a.) Draw an energy-level diagram for the valence molecular orbitals of CO. Include the relevant atomic orbitals in your diagram. Clearly label each molecular orbirals (e.g.?2, ?2p…
a.) Draw an energy-level diagram for the valence molecular orbitals of CO. Inclu
a.) Draw an energy-level diagram for the valence molecular orbitals of CO. Include the relevant atomic orbitals in your diagram. Clearly label each molecular orbirals (e.g.?2, ?2p…
a.) Draw an energy-level diagram for the valence molecular orbitals of CO. Inclu
a.) Draw an energy-level diagram for the valence molecular orbitals of CO. Include the relevant atomic orbitals in your diagram. Clearly label each molecular orbirals (e.g.?2, ?2p…
a.) Fluorine-18 undergoes positron emission with a half life of 1.10x10^2 minute
a.) Fluorine-18 undergoes positron emission with a half life of 1.10x10^2 minutes. If a patient is given a 248 mg does for a PET scan, how long will it take for the amount of fluo…
a.) Formic acid (HCOO H , Ka = 1.77 x 10 -4 ) is the active ingredient in ant ve
a.) Formic acid (HCOOH, Ka = 1.77 x 10-4) is the active ingredient in ant venom. Write the dissociation reaction for an aqueous solution of formic acid. __________________________…
a.) Let’s assume that during the Late Glacial Maximum perihelion occurs on the f
a.) Let’s assume that during the Late Glacial Maximum perihelion occurs on the first day of summer in the Northern Hemisphere and that Earth’s polar angle is 24.2°. Because of a c…
a.) The distribution of sodium ions across a certain biological membrane is 11.0
a.) The distribution of sodium ions across a certain biological membrane is 11.0 mmol/L inside the cell and 146 mmol/L outside the cell. At equilibrium the concentrations would be…
a.) The formula for dinitrogen tetraoxide is N2O4. How many Grams of nitrogen ar
a.) The formula for dinitrogen tetraoxide is N2O4. How many Grams of nitrogen are present in 1.40 moles of dinitrogen tetraoxide? b.) How many Moles of oxygen are present in 2.98 …
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