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Chemistry 102
February 2022
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Chemistry 102
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February 17, 2022
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February 17 of 2022
2.0 lb of water inside a piston-cy inder assembly undergoes the following two processes in seriesProcess 1-2: Contant pressure cooling from a saturated vapor at p1 = 170 psi until x2 = 80%.Process 2-3: Constant volume heating to a saturated vapor.There are no changes in kinetic or potential…
What is the reaction order with respect to ?[OCl^-]?
What is the reaction order with respect to ?[OCl^-]?
1. Based on the values you recorded during the lab session for volume of methanol and mass of NaOH, calculate the actual concentration of the resulting solution in units of molarity. 2. If the NaOH solid absorbed water from the atmosphere during this process (as described in the procedure…
consider the reaction of two cysteine amino acids together in the formation of a disulfide bond and the biological compound cystine. Cys-SH + Cys-SH------->Cys-S-S-Cys (cystine) Draw or sketch what the TLC pattern might look like where the starting material is separated by the…
Chemical reaction engineering
Compare the boiling points of HF (20°C)and HCL (-85°C)
Calculate the density of dinitrogen tetroxide gas (N2O4) at 111.5 kPa and 0 °C.
In a titration, 25.18 mL of a monoprotic weak acid HA (aq) is neutralized with 25.18 mL of 0.502 M NaOH(aq). a) Calculate the ratio of [A–] to [HA] after 12.59 mL of the 0.502 M NaOH(aq) had been added to the initial amount of HA(aq). (b) At the equivalence point, you have a solution of what…
Assume that you prepared a solution by adding 0.05 mL (1 drop) of 0.5 M HCl to 5 x 107 mL of "pure" water. Calculate the resultant pH. (Hint - the answer is not pH = 9.3; add up the hydronium ions from ALL sources)
An aqueous solution of a monoprotic weak acid HA was prepared. The pH of this solution was 2.6, and the initial molarity of HA was 0.250M. Calculate the percent dissociation of HA.
The reaction CS2 + 3O2 = CO2 + 2SO2 follows second order kinetics. The rate law is rate = K[CS2]2. If it requires 65,100 seconds for the CS2 concentration to decrease from 0.050M to 0.025M, find the rate constant for this reaction.
Consider the following materials: 1) liquid methane (CH4) 2) liquid water (H2O), 3) solid sodium fluoride (NaF) and 4) liquid solution of NaF in water. Describe the types of forces which hold the ions and/or molecules together in each of these materials.
Explain WHY a simple cubic cell only contains 1 net atom, while a body-centered cubic cell contains 2 net atoms and a face centered cubic cell contains 4 net atoms
Tertiary butyl bromide (C4H9Br) reacts with water in the following manner: C4H9Br + H2O = C4H9OH + HBr. The reaction follows the first order rate law rate = K(C4H9Br). If one begins with 1 gram of tertiary butyl bromide and K = 5.0 x 10-3 sec-1, how much tertiary butyl bromide will be left…
One dissolves 15.00 grams CaCl2 in 100.0 grams of water. The final volume is 108.0 mL. The temperature is 298K. Calcium chloride is an ionic compound which dissociates in the following manner: CaCl2 (s) = Ca+2 + 2Cl-. The vapor pressure of water is 23.8 mm Hg at 298 K.
X is a weakly acidic drug (pka=5.2). Assuming the pH of gastric fluid in the stomach is 1.0. what is the percemt of its un-ionized form in the stomach?
Lab Data Verify your mass calculation Calcium chloride CaCl2 CaCl2 CaCl2 Molar mass (g/mol) 110.98 110.98 110.98 Mass of calorimeter (g) 17.22 Volume of DI water (mL) 47.2 Mass of calcium chloride (g) 1.13 Moles of calcium chloride (mol) 0.0102 Mass of calorimeter + solution (g) 65.67 Mass of…
What is the reaction order with respect to ?[OCl^-]?
What is the reaction order with respect to ?[OCl^-]?
1. Based on the values you recorded during the lab session for volume of methanol and mass of NaOH, calculate the actual concentration of the resulting solution in units of molarity. 2. If the NaOH solid absorbed water from the atmosphere during this process (as described in the procedure…
Calculate the density of dinitrogen tetroxide gas (N2O4) at 111.5 kPa and 0 °C.
In a titration, 25.18 mL of a monoprotic weak acid HA (aq) is neutralized with 25.18 mL of 0.502 M NaOH(aq). a) Calculate the ratio of [A–] to [HA] after 12.59 mL of the 0.502 M NaOH(aq) had been added to the initial amount of HA(aq). (b) At the equivalence point, you have a solution of what…
Assume that you prepared a solution by adding 0.05 mL (1 drop) of 0.5 M HCl to 5 x 107 mL of "pure" water. Calculate the resultant pH. (Hint - the answer is not pH = 9.3; add up the hydronium ions from ALL sources)
An aqueous solution of a monoprotic weak acid HA was prepared. The pH of this solution was 2.6, and the initial molarity of HA was 0.250M. Calculate the percent dissociation of HA.
The reaction CS2 + 3O2 = CO2 + 2SO2 follows second order kinetics. The rate law is rate = K[CS2]2. If it requires 65,100 seconds for the CS2 concentration to decrease from 0.050M to 0.025M, find the rate constant for this reaction.
One dissolves 15.00 grams CaCl2 in 100.0 grams of water. The final volume is 108.0 mL. The temperature is 298K. Calcium chloride is an ionic compound which dissociates in the following manner: CaCl2 (s) = Ca+2 + 2Cl-. The vapor pressure of water is 23.8 mm Hg at 298 K.
X is a weakly acidic drug (pka=5.2). Assuming the pH of gastric fluid in the stomach is 1.0. what is the percemt of its un-ionized form in the stomach?
Lab Data Verify your mass calculation Calcium chloride CaCl2 CaCl2 CaCl2 Molar mass (g/mol) 110.98 110.98 110.98 Mass of calorimeter (g) 17.22 Volume of DI water (mL) 47.2 Mass of calcium chloride (g) 1.13 Moles of calcium chloride (mol) 0.0102 Mass of calorimeter + solution (g) 65.67 Mass of…