Chemistry concepts and calculations

5. The half-life of a radioactive (follows first order rate law) isotope is 10 d

5. The half-life of a radioactive (follows first order rate law) isotope is 10 days. How many days would be required for the isotope to degrade to one eighth of its original radio…

5. The heat of vaporization of a liquid may be obtained from the following equat

5. The heat of vaporization of a liquid may be obtained from the following equation: In p, 1 1 T-T, P (This is an approximated integrated form of the Clausius-Clapeyron equation.)…

5. The hydration of CO2 catalyzed by the enzyme carbonic anhydrase is given by t

5. The hydration of CO2 catalyzed by the enzyme carbonic anhydrase is given by the following reaction: CO2 + H2O arrow HCO3^- + H^+ In this reaction, CO2 is converted to bicarbona…

5. The integrated circuits in your cell phone and computer are made from the sem

5. The integrated circuits in your cell phone and computer are made from the semiconductor silicon. The silicon is obtained from a really inexpensive starting material, sand, whic…

5. The melting point of 4-nitrobenzyl alcohol is reported as 94 C and the meltin

5. The melting point of 4-nitrobenzyl alcohol is reported as 94 C and the melting point of triphenylmethane is reported as 94. Which statement most accurately reflectsthe expected…

5. The molecular masses of the following five molecules are all between 100- 104

5. The molecular masses of the following five molecules are all between 100- 104. and will not be a factor in your answers to the questions. Do not look up data; answer the questi…

5. The organic chemical aniline, CHsNH2, was to be determined instrumentally. 5.

5. The organic chemical aniline, CHsNH2, was to be determined instrumentally. 5.0 milligrams of pure aniline was dissolved in 1.00 liter of water. The instrument aralyzed this sol…

5. The organic chemical aniline, CHsNH2, was to be determined instrumentally. 5.

5. The organic chemical aniline, CHsNH2, was to be determined instrumentally. 5.0 milligrams of pure aniline was dissolved in 1.00 liter of water. The instrument aralyzed this sol…

5. The rate constant for the first-order isomerization of cyclopropane to propen

5. The rate constant for the first-order isomerization of cyclopropane to propene is 0.024 min1 at 760K. (5 points each) Cyclopropane (C,H)Propene (C,H) 2 Calculate the half life …

5. The reaction for the formation of nitrosyl chloride, 2 No(g) C2(g)2 NOCI(g),

5. The reaction for the formation of nitrosyl chloride, 2 No(g) C2(g)2 NOCI(g), was studied at 25°C. The pressures at equilibrium were found to be PNOCI-1.2 atm, pNo 5.0 x 10-2 at…

5. The reaction which produces iron metal from iron ore, Fe-Os, in a blast furna

5. The reaction which produces iron metal from iron ore, Fe-Os, in a blast furnace is represented by the balanced equation: Fe2O3(s) 3 CO (g) 2 Fe (s) + 3CO2 (g) + A small blast f…

5. The sketch shows a tank which contained a highly flammable volatile liquid at

5. The sketch shows a tank which contained a highly flammable volatile liquid at a slightly higher than Stirrer Scraper rod Flammable vapour and nitrogen Solid residues had formed…

5. The temperature dependence of the acid-catalyzed hydrolysis of penicillin is

5. The temperature dependence of the acid-catalyzed hydrolysis of penicillin is Investigated, and the dependence of kr on temperature is given in the following table. What is the …

5. The third way you supported that you made 4-methylcyclohexene was by taking t

5. The third way you supported that you made 4-methylcyclohexene was by taking the IR of the product and comparing it to the 4-methylcyclohexanol starting material. a. Attach the …

5. The vapor pressure of an aqueous solution is found to be 24.9 mmHg at 25°C. W

5. The vapor pressure of an aqueous solution is found to be 24.9 mmHg at 25°C. What is the mole fraction of solute in this solution? The vapor pressure of water is 25.756 mmHg at …

5. The water potential in a dilute aqueous solution depends on the pressure P an

5. The water potential in a dilute aqueous solution depends on the pressure P and the solute concentration solte as follows: where ??120 is the chemical potential of pure water (i…

5. There are four pigments that you will separate from spinach this week: chloro

5. There are four pigments that you will separate from spinach this week: chlorophyll-a, chlorophyll-b xanthophylls, and carotene. What color will the bands for these pigments be?…

5. Titration of Drain Cleaner Given concentration of standard HO (M) Mass of dea

5. Titration of Drain Cleaner Given concentration of standard HO (M) Mass of deaner () g 6S 62 G so pt at first equivalence point Number of drops of NC at first equivalence point …

5. Two Solutions are prepared using the same solution: Solution A: 0.27g of the

5. Two Solutions are prepared using the same solution: Solution A: 0.27g of the solute dissolves in 27.4 g of t-butanol. Solution B: 0.23g of the solute dissolves in 26.8g of cycl…

5. Two Solutions are prepared using the same solution: Solution A: 0.27g of the

5. Two Solutions are prepared using the same solution: Solution A: 0.27g of the solute dissolves in 27.4 g of t-butanol. Solution B: 0.23g of the solute dissolves in 26.8g of cycl…

5. Two chemicals, A and B, are combined, forming chemical C. The rate of the rea

5. Two chemicals, A and B, are combined, forming chemical C. The rate of the reaction is jointly proportional to the amounts of A and B not yet converted to C. Initially, there ar…

5. Use CHi4Oo7 as the simplified formula for dry, ash-free biomass to solve the

5. Use CHi4Oo7 as the simplified formula for dry, ash-free biomass to solve the following problems a. Calculate the heat of reaction (HR, k]/kmol, 25°C) of the char formation from…

5. Use the GC and IR data to identify the components of your product mixture and

5. Use the GC and IR data to identify the components of your product mixture and the ratio of each of the products. Label all the important peaks on each of the spectra and turn t…

5. Use the following data to determine the delta H for the conversion of diamond

5. Use the following data to determine the delta H for the conversion of diamond into graphite: C(diamind) (s) + O2(g) = CO2(g) delta H degrees = -395.4 kJ 2CO2(g) = 2 CO(g) + O2(…

5. Use the following data to determine the delta H for the conversion of diamond

5. Use the following data to determine the delta H for the conversion of diamond into graphite: C(diamind) (s) + O2(g) = CO2(g) delta H degrees = -395.4 kJ 2CO2(g) = 2 CO(g) + O2(…

5. Use your experimentally determined Laboratory Euperamener 3T3 when 5 mL of 0.

5. Use your experimentally determined Laboratory Euperamener 3T3 when 5 mL of 0.004 value of K and show. by calculation, Agacro, should precipitate M AgNO, are added to s mL of0.0…

5. Water has a standard boiling point of 99.60 °C and a vapor pressure of 42.23

5. Water has a standard boiling point of 99.60 °C and a vapor pressure of 42.23 torr at 35.0 °C Caohg he Clauslis-Ciapeyroam equation. (Equation 5.21) Clapeyron equation you deriv…

5. What are the possible orbitals for n 3? (a) s, p, d, f (b) s, p, d (c) s, p (

5. What are the possible orbitals for n 3? (a) s, p, d, f (b) s, p, d (c) s, p (d) s What value of I is represented by a d orbital? (a) 0 6. (b) 1 (c) 2 (d) 3 7. Which of the foll…

5. What is the [H3O] in a solution formed by dissolving in 1.00 g NH4CI (MM 53.5

5. What is the [H3O] in a solution formed by dissolving in 1.00 g NH4CI (MM 53.5 g/mol) in 30.0 mL of 3.00 M NHs? Kb(NH3)-1.8 105 A. 2.7 * 109 M B. 5.510-10 C. 1.2 10-10 D. 1.4 10…

5. What is the approximate pll of a D.1 MNHa) solution ?) ? C) 7 D) 11 E) 13 hax

5. What is the approximate pll of a D.1 MNHa) solution ?) ? C) 7 D) 11 E) 13 hax is the hydroxide-ion concentration at equilibrium in a 0.13 M solution of ethylamine (C:H,NHs K-4.…

5. What is the conjugate acid of NH 3 ? [A] NH 2 + [B] NH 4 OH [C] NH 3 + [D] NH

5. What is the conjugate acid of NH3? [A] NH2+ [B] NH4OH [C] NH3+ [D] NH3 [E] NH4+    6. The conjugate base of NH2- is ________ [A] OH- [B] NOH [C] NH3 [D] H3O+ [E] NH2-    7. Wha…

5. What is the molarity (M) of a solution that results when 30.2g of (NH4)3PO4 d

5. What is the molarity (M) of a solution that results when 30.2g of (NH4)3PO4 dissolved in H2O and diluted to exactly 250.0 mL? 6. Which compound is the oxidizing agent in the re…

5. What is the printout of the following switch statement? char ch = \'a\'; swit

5. What is the printout of the following switch statement?         char ch = 'a';                 switch (ch) {             case 'a':             case 'A':                 System.…

5. What is the reaction catalyzed by triosephosphate isomerase: (give only the n

5. What is the reaction catalyzed by triosephosphate isomerase: (give only the names of substrate and product) The 0" for this reaction as used in glycolysis is +7.9 klinol. Based…

5. What is the role of acetic acid during synthesis of methyl orange dye? ( poi

5. What is the role of acetic acid during synthesis of methyl orange dye? ( poi t) c) As an acid Protonation of Dimethyl Aniline b) Protonation of Sulfani ilic acid catalyst d) Al…

5. What is the velocity of chlorine at 78.0 degree C? a) 11.1 m/s b) 19.1 m/s c)

5. What is the velocity of chlorine at 78.0 degree C? a) 11.1 m/s b) 19.1 m/s c) 351 m/s d) 60.0 m/s e) 34.9 m/s 6. A chemical system absorbs 155 kJ of heat and has 22 kl of work …

5. What is the wavelength, in nm, of light with an energy content of 700 kJ/mol

5. What is the wavelength, in nm, of light with an energy content of 700 kJ/mol of ph A.2.83 nm C.0.700 nm D.283 nm 6. Which one of the following scts of quantum numbers would not…

5. What volume of gas K and 0.500 atm is produced by the decomposition of 0.10 m

5. What volume of gas K and 0.500 atm is produced by the decomposition of 0.10 mol of at 2 by the following reaction? 2NaN (s) 2Na(s) 3N2(g) A. 7.34 L B. 2.24 L C. 14.7 L D. 3.67 …

5. When 13-butadiene reacts with HCl, two products form: 3-chloro-1-butene and 1

5. When 13-butadiene reacts with HCl, two products form: 3-chloro-1-butene and 1-chloro-2-butene. At low temperatures (-78 C), which of the following statements is correct? A) The…

5. When 50.0 mL of 1.00 M HCl is mixed with 50.0 mL of 1.00 M NaOH in a calorime

5. When 50.0 mL of 1.00 M HCl is mixed with 50.0 mL of 1.00 M NaOH in a calorimeter, a neutralization reaction takes place in which the temperature of the mixture increases from 2…

5. When 75.0 mL of 1.10 M HNO, was reacted with 75.0 mL of 1.25 M NaOH in a cons

5. When 75.0 mL of 1.10 M HNO, was reacted with 75.0 mL of 1.25 M NaOH in a constant-pressure calorimeter, the temperature of the solution rose by 7.4 °C. a. Write a balanced comp…

5. When a solution of Bacl2 is added to a solution of Lizso4, a precipitate form

5. When a solution of Bacl2 is added to a solution of Lizso4, a precipitate forms. a) Show the four ions present in the two solutions with the correct charges. cross out the ions …

5. When a student mixes 50 mL of 1 M HCI and 50 mL of 1 M NaOH in a coffee-cup c

5. When a student mixes 50 mL of 1 M HCI and 50 mL of 1 M NaOH in a coffee-cup calorimeter, the temperature of the resultant solution increases from 21.0 C to 27.5 °C a) Find the …

5. Which group of elements reacts violently with water? A noble gases B. alkali

5. Which group of elements reacts violently with water? A noble gases B. alkali metals C alkaline earth metals D. halogens 6, A sample of pure lithium carbonate contains 18.8 % li…

5. Which metal produced the most hydrogen based on moles of metal used? 6. Write

5. Which metal produced the most hydrogen based on moles of metal used? 6. Write balanced equations for each reaction (equation editior). Based on the coefficients, which metal is…

5. Which nuclear decay product is the slowest? 6. How do beta particles and posi

5. Which nuclear decay product is the slowest? 6. How do beta particles and positrons differ? 7. If polonium-210 is unstable because it has too much mass, what decay product is it…

5. Which of the below are ways that allow you to recognize equilibrium? a. const

5. Which of the below are ways that allow you to recognize equilibrium? a. constant temperature b. constant color c. constant pressure d. All of the above are correct. e. None of …

5. Which of the following compounds is a carboxylic acid? a) CHCH=CHCH , b) CH=C

5. Which of the following compounds is a carboxylic acid? a) CHCH=CHCH , b) CH=CHCHC(OH)Hy d) CHCOCH, e) (CH) CHCHCOOH c) HCOOCCHCH, 6. Which of the following compounds is a alcoh…

5. Which of the following is not a postulate of the kinetic-molecular theory of

5. Which of the following is not a postulate of the kinetic-molecular theory of gases? a. b. c. All gases consist of atoms and molecules moving randomly in all directions at vario…

5. Which of the following is the correct order of boiling points for KNO3, CH3OH

5. Which of the following is the correct order of boiling points for KNO3, CH3OH, C2H6, Ne? A. What type of question is this? (What category of chemistry) B. How did you know. Wha…