Chemistry concepts and calculations

1. The rate of a reaction can be determined by measuring either the in concentra

1. The rate of a reaction can be determined by measuring either the in concentration of a product per unit time OR the in concentration of a reactant per unit time. 2. The decompo…

1. The rate of the hydrolysis of sucrose to glucose is quite slow in the absence

1. The rate of the hydrolysis of sucrose to glucose is quite slow in the absence of a catalyst. Sucrose + water glucose + fructose a. If the initial concentration of sucrose is 0.…

1. The rate of the hydrolysis of sucrose to glucose is quite slow in the absence

1. The rate of the hydrolysis of sucrose to glucose is quite slow in the absence of a catalyst. Sucrose + water glucose + fructose a. If the initial concentration of sucrose is 0.…

1. The reaction 2NO(g) + Cl 2 (g) 2 NOCl(g) has a K c = 6.5x10 4 . The reac

1. The reaction 2NO(g) + Cl2(g) <--> 2 NOCl(g) has a Kc = 6.5x104. The reaction is exothermic at 300K. If the container was heated to 350K while holding the pressure constan…

1. The reaction A + 2B C is zero order in A & first order in B. The rate is 0.01

1. The reaction A + 2B C is zero order in A & first order in B. The rate is 0.012 mol L-1 s-1 when [A] is 0.020 and [B] is 0.60 M. Determine k (include units) and find the rea…

1. The reaction below can be described as (it is not B!) a.oxidative deamination

1. The reaction below can be described as (it is not B!) a.oxidative deamination b.reductive deamination c.transamination d.the Cori cycle glutamine+pyruvate<->a-ketoglutara…

1. The reaction below has an equilibrium constant Kp=2.2×106 at 298 K. 2COF2(g)C

1. The reaction below has an equilibrium constant Kp=2.2×106 at 298 K. 2COF2(g)CO2(g)+CF4(g) Calculate Kp for the reaction below. COF2(g)12CO2(g)+12CF4(g) Calculate Kp for the rea…

1. The reaction of a mixture of CO and H2 is predicted to produce 554 g of CH3OH

1. The reaction of a mixture of CO and H2 is predicted to produce 554 g of CH3OH. CO(g) + 2 H2(g) CH3OH() If only 465 g of CH3OH is actually produced, what is the percent yield of…

1. The reaction of fluorine gas and chlorine dioxide gas is first order in fluor

1. The reaction of fluorine gas and chlorine dioxide gas is first order in fluorine and first order in chlorine dioxide. The reaction has a rate constant of 1.23 M-1 s-1. Calculat…

1. The reaction of glucose (C 6 H 12 O 6 ) with oxygen gas produces carbon dioxi

1. The reaction of glucose (C6H12O6) with oxygen gas produces carbon dioxide and water. The energy released during this reaction is 2802 kJ/mol of glucose. How many kilojoules fro…

1. The reaction shown below has the rate law: Rate = k [BrO3–][Br–][H+]. BrO3–(

1. The reaction shown below has the rate law: Rate = k[BrO3–][Br–][H+]. BrO3–(aq) + 5 Br–(aq) + 6 H+(aq) 3 Br2(aq) + 3 H2O(l) What is the overall order of reaction? zeroth first s…

1. The relation between gram and amu is represented by _________________________

1. The relation between gram and amu is represented by ____________________________(use NA = 6 x 10*23) 2. The atomic mass of Rubidium is 85, so the mass of one mole of Rubidium i…

1. The scientific method is a common sense, systematic approach to solving probl

1. The scientific method is a common sense, systematic approach to solving problems. (Points : 2) True False 2. The number 48275 written in correct scientific notation is ___ . (P…

1. The scientific method is a common sense, systematic approach to solving probl

1. The scientific method is a common sense, systematic approach to solving problems. (Points : 2) True False 2. The number 48275 written in correct scientific notation is ___ . (P…

1. The scientific method is a common sense, systematic approach to solving probl

1. The scientific method is a common sense, systematic approach to solving problems. (Points : 2) True False 2. The number 48275 written in correct scientific notation is ___ . (P…

1. The scientific method is a common sense, systematic approach to solving probl

1. The scientific method is a common sense, systematic approach to solving problems. (Points : 2) True False 2. The number 48275 written in correct scientific notation is ___ . (P…

1. The second order decomposition of HI has a rate constant of 1.80 x 10-3 M-1s-

1. The second order decomposition of HI has a rate constant of 1.80 x 10-3 M-1s-1. How much HI remains after 27.3 s if the initial concentration of HI is 4.78 M? 2. Write a nuclea…

1. The secondary structure of a protein is determined by a) the amino acid compo

1. The secondary structure of a protein is determined by a) the amino acid composition and sequence B) The binding of many polypeptides C) the hydrogen bonding that forms helixes …

1. The shape of the water-to-gass meniscus results from the strong adhesive forc

1. The shape of the water-to-gass meniscus results from the strong adhesive forces between glass and water. A) true B) false 2.Identify the dominant (strongest) type of intermolec…

1. The side chain of the glutamine cannot undergo ionization as resonance impart

1. The side chain of the glutamine cannot undergo ionization as resonance imparts a partial double bond character to the C-N bond. What will be the primary type of interaction in …

1. The similarities of gene sequences and metabolic pathways across the three do

1. The similarities of gene sequences and metabolic pathways across the three domains of life are evidence for: Select one: A. evolution. B. a common ancestor. C. cross-species ge…

1. The slow cooling of a hypereutectoid steel from the y-austenite region will p

1. The slow cooling of a hypereutectoid steel from the y-austenite region will produce a mircrostructure of? a. Pearlite b. Pearlite and Proeutectoid a-ferrite c. Laminated eutect…

1. The solubility of BaSO4 in water at 25°C is measured to be 0.0023gL. Use this

1. The solubility of BaSO4 in water at 25°C is measured to be 0.0023gL. Use this information to calculate Ksp for BaSO4. 2.The pH of a 0.33 M solution of HC4H3N2O3 is measured to …

1. The solubility of O 2 in water is approximately 0.0380 g L -1 of water when t

1. The solubility of O2 in water is approximately 0.0380 g L-1 of water when the temperature is 25.0°C and the partial pressure of gaseous oxygen is 660 torr. The oxygen gas above…

1. The solubility of a substance in 100g water is 50g at 25oC. 55 g of the subst

1. The solubility of a substance in 100g water is 50g at 25oC.  55 g of the substance is dissolved in water at 40oC and cooled to 25oC, no crystals appear. The solution is        …

1. The solubility of benzoic acid in water is 6.30 g per 100 mL at 100 degree an

1. The solubility of benzoic acid in water is 6.30 g per 100 mL at 100 degree and 0.34 g per 100 mL at 25 degree C. Calculate the minimum volume of water needed to dissolve 1.00 g…

1. The solubility product of PbBr 2 is 8.9 ? 10 -6 . Determine the molar solubil

1. The solubility product of PbBr2 is 8.9 ? 10-6. Determine the molar solubility in the following. (a) pure water (b) 0.12 M KBr solution (c) 0.15 M Pb(NO3)2 solution 2. As a resu…

1. The solvent which is used in substitution reactions can greatly affect the ra

1. The solvent which is used in substitution reactions can greatly affect the rate of the reaction. In general substitution reactions are performed in polar solvents. SNI reaction…

1. The special someone in your life recently gave you diamond, however you have

1. The special someone in your life recently gave you diamond, however you have come to suspect that it is not a real diamond and might actually be cubic zirconia. To confirm its …

1. The specific heat of iron metal is 0.450 J/gK. How many J of heat are necessa

1. The specific heat of iron metal is 0.450 J/gK. How many J of heat are necessary to raise the temperature of a 1.05 kg block of iron from 28.0 Cto 85.0 C? 2. A 1.80-g sample of …

1. The spectral line of a certain metal occurs at 665 nm ( 6.65×10 -7 m). Calcul

1. The spectral line of a certain metal occurs at 665 nm (6.65×10-7 m). Calculate the energy of one photon of this light 2. What is the wavelength, in nanometers, of light with a …

1. The standard Gibbs free energy for iodine sublimation, I2(s) --> I2(g), ?Go =

1. The standard Gibbs free energy for iodine sublimation, I2(s) --> I2(g), ?Go = + 19.4 kJ/mol. Explain why solid iodine sublimes in open air at 298 K 2. Demonstrate that to tr…

1. The standard enthalpy of formation for solid calcium phosphate is-4132 kJ/mol

1. The standard enthalpy of formation for solid calcium phosphate is-4132 kJ/mol. a. Write the net ionic equation for the precipitation of calcium phosphate that results from mixi…

1. The standard enthalpy of formation for solid calcium phosphate is-4132 kJ/mol

1. The standard enthalpy of formation for solid calcium phosphate is-4132 kJ/mol. a. Write the net ionic equation for the precipitation of calcium phosphate that results from mixi…

1. The student from class has an exam to study for and asks you to analyze her d

1. The student from class has an exam to study for and asks you to analyze her data. Ethical problems aside, here are the data (the area of each peak – you should assume injection…

1. The substance silicon is found to crystallize in a cubic lattice, with an edg

1. The substance silicon is found to crystallize in a cubic lattice, with an edge length of 541.7 pm. if the density of solid silicon is 2.348 g/cm3, how many Si atoms are there p…

1. The synthesis of the complex cation [Co(en) begis with CoCl2 6 H2O. This coba

1. The synthesis of the complex cation [Co(en) begis with CoCl2 6 H2O. This cobalt starting material is first allowed to react with the ethylenediamine ligands and then hydrogen p…

1. The table at right is similar to Table 18.1 in that it tabulates standard red

1. The table at right is similar to Table 18.1 in that it tabulates standard reduction voltages of half reactions, but in this case the half reactions involve organic molecules im…

1. The table below shows the solubility of a certain organiccompound in water at

1. The table below shows the solubility of a certain organiccompound in water at five different temperatures. 0 20 40 60    80 Temperature (oC) 1.5 g 3.0 g 6.5 g   11.0g   17.0g S…

1. The term overloaded refers to _________________________. two or more methods

1. The term overloaded refers to _________________________. two or more methods in different classes that have the same name 2. Java will automatically define a constructor ______…

1. The thermal decomposition of acetaldeh mechanism: yde. CHCHO CH, + CO, has th

1. The thermal decomposition of acetaldeh mechanism: yde. CHCHO CH, + CO, has the following proposed hu (1) ki I got question #1 (3) k (4) ka (5) ks ng, termination, etc. What cou…

1. The thermal decomposition of potassium chlorate can be used to produce oxygen

1. The thermal decomposition of potassium chlorate can be used to produce oxygen in the laboratory: 2 KClO3(s) → 2 KCl(s) + 3 O2(g). What vollume (in L) of O2 gas is produced by…

1. The thermite reaction is performed using 8.6g Fe2O3 and 1.8g powdered Al meta

1. The thermite reaction is performed using 8.6g Fe2O3 and 1.8g powdered Al metal/ a. Which reactant is the excess? b. How many grams of excess reactant are left over? c. How many…

1. The thermochemical equation for the combustion of ethanol is as follows: C 2

1. The thermochemical equation for the combustion of ethanol is as follows: C2H5OH(l) + 3 O2(g)   ?   2 CO2(g) + 3 H2O(g)     ?H = ?1367 kJ How many kilojoules of heat would be pr…

1. The third step in glycolysis is the conversion of fructose-6-phosphate to fru

1. The third step in glycolysis is the conversion of fructose-6-phosphate to fructose-1,6- bisphosphate (F16BP) catalyzed by the enzyme PFK-1. This reaction is the "committed step…

1. The third step in glycolysis is the conversion of fructose-6-phosphate to fru

1. The third step in glycolysis is the conversion of fructose-6-phosphate to fructose-1,6- bisphosphate (F16BP) catalyzed by the enzyme PFK-1. This reaction is the "committed step…

1. The three major components of food are carbohydrates, proteins, and fats (tri

1. The three major components of food are carbohydrates, proteins, and fats (triacylglycerols, phospholipids, and sterols mostly). After digestion, some are broken down into compo…

1. The three major components of food are carbohydrates, proteins, and fats (tri

1. The three major components of food are carbohydrates, proteins, and fats (triacylglycerols, phospholipids, and sterols mostly). After digestion, some are broken down into compo…

1. The triple point of CO2 is -56.2C, and the vapour pressure of solid CO2 below

1. The triple point of CO2 is -56.2C, and the vapour pressure of solid CO2 below this temperature is given by: log,op. -1353/T + 9.832 = where p is in mmHg and T in K. The latent …

1. The two amino acids below (phenylalanine and tryptophan) are capable of react

1. The two amino acids below (phenylalanine and tryptophan) are capable of reacting with each other in three ways: COOH with COOH, NH2 with NH2 or COOH with NH2. What sort of synt…