CH₂OH OH -O OH + CH₂OH CH₂OH DOG OH HO H₂O OH HO OH HO to answer the following questions (30a through 30i). * CH₂OH OH CH₂OH -0- OH HO CH₂OH What is the name for this type of reaction? ANSWER Is AG positive or negative for this reaction? ANSWER (positive or negative?) Is this reaction anabolic or catabolic? ANSWER (anabolic or catabolic?) What type of macromolecule is in this reaction. ANSWER Explain why an enzyme is required for this reaction to happen. WER (in a sentence)
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In this reaction the two monomers react to form a macromolecule which consists of two molecules of its monomers. We can see in this reaction a molecule of water is eliminated.
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- Physical and Biological SciencesA bomb calorimeter was calibrated by burning 1.013 g of benzoic acid(C7H6O2) (ΔUcomb = 3.221 × 103 kJ/mol). The temperature change in thecalorimeter during the calibration combustion was 5.19°C. A nutritional chemist then used the calibrated calorimeter to determine the energy con-tent of food. The chemist carefully dried a sample of food and placed 0.8996 g of the sample in the calorimeter with sufficient oxygen for thecombustion to go to completion. Combustion of the food sample causedthe temperature of the calorimeter to increase by 4.42°C.1. Approximately how many moles of O2 gas were consumed in thecalibration combustion?a) 0.008 c) 0.2b) 0.1 d) 0.06 2. What is the heat capacity (CV) of the calorimeter?a) 5.15 kJ/°C c) 5.12 kJ/°Cb) 5.08 kJ/°C d) 4.97 kJ/°C3. What is the energy content of the food?a) 22.8 kJ/g c) 25.3 kJ/gb) 4.97 kJ/g d) 0.201 kJ/g4. What would be the effect on the result if the food sample were notcompletely dried prior to being…SITUATION:You are a chemist in a manufacturing company which produces acetaldehyde, CH3CHO. This is prepared by the reaction of ethanol with copper (II) oxide according to the following equation: CH3CH2OH + CuO → CH3CHO + H2O + CuIf there are 1620 g of ethanol and 1020 g of CuO readily available in the laboratory, what mass of acetaldehyde can be produced? QUESTIONS: 1. Would you recommend the company to buy more ethanol or copper (II) oxide? Why?2. How many grams of acetaldehyde will be produced from the readily available materials?3. How many grams of the excess reactant will be left after the reaction?4. If your actual yield is 552.6 g, what is its percent yield?The reaction quotient is Q=1.6×10-26 Part B What pH is needed to produce this value of Q if the concentration and pressure values are [Br2]=2.50×10−4M , [Br−]=11.65M, [SO42−]=9.50M, and PSO2=3.50×10−5atm ? Express your answer numerically to two decimal places.
- Which of the following correctly explains why the vapor pressure of water has to be included in the calculations? Some of the liquid water evaporates into the gas, and increases the total pressure generated by the trapped gas. As the H2(g) is bubbled up the reaction solution, some of the H2(g) molecules are solubilized by water in the aqueous solution, effectively decreasing the measured pressure above. The pressure contributed by the H2(g) is greater than the measured total pressure because of the contribution of partial pressure of water vapor. The pressure exerted by the evolved H2(g) is reduced because of the co-presence of water vapor, thus Pwater vapor has to be added to Pdry gas. Overview of the experiment:The main constituents in vinegar are water and ethanoic acid (CH3COOH). In order to determine the concentration of acid in homemade vinegar, a student titrated 25 cm3 of 001 M NaOH against the vinegar. The equation for the reaction is: CH3COOH(aq) + NaOH(aq) ® CH3COONa(aq) + H2O(l) The following titration results were obtained: Burette readings (cm3) Rough 1 2 Final burette reading 20.10 38.90 31.40 Initial burette reading 0.10 20.00 12.50 Volume of vinegar used 20.00 18.90 18.90 (a) What volume of vinegar should be used in the calculation? (b) What is the mole ratio of NaOH:CH3COOH? (c) Calculate the number of moles of alkali in 25 cm3 of NaOH solution used. (d) How many moles of acid were used in the titration? (e) Calculate the…D4 Please answer the question and write out the balanced chemical equation, thank you.
- Follow the format of solving the problem where you should write the GIVEN, ASKED, SOLUTION, and ANSWER. Add curved arrows to the following reactions to indicate the flow of electrons for all of the bond-forming and bond-breaking steps. Explain the answers and should be rounded-off according to significant figures.Highlight your values of A,B,C and D. For your question: A mL of B mol/L sodium phosphate solution is combined with C mL of D mol/L calcium bicarbonate. (Calcium bicarbonate is soluble.) A mL B mol/L C mL D mol/L 75.0 ml 0.300 67.5 0.350 Before you begin your reaction, you must accurately produce 1.500 L of your sodium phosphate solution from sodium phosphate trihydrate solid. Write out a procedure to explain all the steps you will take in the lab when making the solution to ensure that your solution concentration is accurate. Please include calculations that show the required mass of solid. Also include the correct names of all equipment used.D5 Please answer the question and write the chemical equation, thanks.
- 2. The following question tests your lab skills as well as basic knowledge understanding: In Lab1- KHP Determination, 0.85 g moisturized NaOH (M.W.= 40.01 g/mol) solid was dissolved in 500.0 mL of water. 24.21 mL of this NaOH solution was consumed to reach the equivalence point when titrated with 0.2021 g of pure KHP (M.W.=204.22 g/mol. Solid was fully dissolved in 50 mL deionized water). (a). Please write the reaction equation (balanced). Then calculate the precise concentration of NaOH solution. List all steps. (b). What are the primary standard and secondary standard material in the above operation respectively? (c). During the above operation, what glassware/tools were used to measure 0.85 g NaOH, to store 1 liter NaOH solution, to measure pure KHP solid, to conduct the titration, respective ? (d). Can this titration be used to measure the pH value of an unknown solution? Why or why not? (e). Did we use a pH buffer solution in the…Suppose a 500.mL flask is filled with 1.7mol of H2 and 0.20mol of HCl. The following reaction becomes possible: H2(g)+Cl2(g)-->2HCl(g) The equilibrium constant K for this reaction is 4.78 at the temperature of the flask. Calculate the equilibrium molarity of Cl2. Round your answer to two decimal places.For the reaction A → B at 298 K, the change in enthalpy is −7 kJ · mol−1and the change in entropy is −25 J · K−1 · mol−1. Is the reaction spontaneous? If not, should the temperature be increased or decreased to make the reaction spontaneous?