Chemistry concepts and calculations

3. A student gets the following data for the Heat of Neutralization Trial using

3. A student gets the following data for the Heat of Neutralization Trial using 1.0 M NaoH and 1.0 M HCl at the First Nations University of Canada Chemistry Laboratory. Trial 1 A.…

3. A student is studying the equilibrium represented by the equation: 2 CrO42-(a

3. A student is studying the equilibrium represented by the equation: 2 CrO42-(aq, yellow) + 2 H3O+(aq) Cr2O72-(aq, orange) + 3 H2O(l) The mixture obtained by the student is yello…

3. A student makes a solution for analysis by mixing 5.172 grams of Cu 2SO4 into

3. A student makes a solution for analysis by mixing 5.172 grams of Cu2SO4 into 500 grams of water. The density of water at the temperature of the lab at the time the solution was…

3. A student measured 20 drops of vinegar and one drop of phenolphthalein soluti

3. A student measured 20 drops of vinegar and one drop of phenolphthalein solution into a well of her H solution to the same well, the well was full, but she transferred some of t…

3. A student observes that a 126 mL dry flask with a foil cap weighs 50.162 g. T

3. A student observes that a 126 mL dry flask with a foil cap weighs 50.162 g. The student then adds 5 mL of an unknown volatile liquid and heats the flask in a boiling water bath…

3. A student performed an experiment similar to the one that you will perform bu

3. A student performed an experiment similar to the one that you will perform but used different solutions The student's data are presented in the table below Student data for est…

3. A student performed an experiment similar to the one that you will perform bu

3. A student performed an experiment similar to the one that you will perform but used different solutions. The student's data are presented in the table below. Student data for e…

3. A student performs an experiment similar to what you will be doing in lab, ex

3. A student performs an experiment similar to what you will be doing in lab, except using calcium metal instead of magnesium metal. The student weights out 0.108 g of calcium. Ho…

3. A student was performing an acid/base titration, to determine the molar conce

3. A student was performing an acid/base titration, to determine the molar concentration of a sample of vinegar, using phenolphthalein as an indicator. After dispensing a 10.00 ml…

3. A student, following the procedure in this experiment, studied the response o

3. A student, following the procedure in this experiment, studied the response of red food dye to visible light and analyzed a stock solution of red food dye of unknown concentrat…

3. A syringe filled with air can be used to test the relationship between the te

3. A syringe filled with air can be used to test the relationship between the temperature and the volume of a sample of gas. The syringe has a movable plunger that allows an enclo…

3. A typical construction of the most commonly used alkaline battery (AA, AAA et

3. A typical construction of the most commonly used alkaline battery (AA, AAA etc) is shown as follows: POSITIVE CONNECTION (stainless steel electrode) CURRENT PICK UP ZINC ANODE …

3. A voltaic cell is constructed that uses the following reaction and operates a

3. A voltaic cell is constructed that uses the following reaction and operates at 298 K. (a) What is the emf of this cell under standard conditions? _____V (b) What is the emf of …

3. A2.52 gram piece of Magnesium is cut up into strips and placed in a beaker wi

3. A2.52 gram piece of Magnesium is cut up into strips and placed in a beaker with 125 ml of 1.5 a Write a balanced reaction for the single displacement reaction that occurs. (2 p…

3. ANSWERS MUST BE REPORTED IN THE CORRECT NUMBER OF SIGNIFICANT FIGURES. a. Pre

3. ANSWERS MUST BE REPORTED IN THE CORRECT NUMBER OF SIGNIFICANT FIGURES. a. Preparation of Titrant. Enough titrant for three standardizations and a total of three an must be made…

3. Acetylcholinesterase catalyzes the hydrolysis of a neurotransmitter acetylcho

3. Acetylcholinesterase catalyzes the hydrolysis of a neurotransmitter acetylcholine Acetylcholine + H2O acetate + choline The KM of acetylcholinesterase for its substrate is 9 x1…

3. Acetylsalicylic acid (C9H8O4) is a weak monoprotic acid, commonly known as ‘a

3. Acetylsalicylic acid (C9H8O4) is a weak monoprotic acid, commonly known as ‘aspirin’. The acetylsalicylic acid in an aspirin tablet is titrated using 0.1035 M NaOH, requiring 2…

3. Acid-free paper is often used for documents intended to last more than 50 yea

3. Acid-free paper is often used for documents intended to last more than 50 years. One source of acidity in paper is a chemical called papermaker's alum,Al(SO4)3 18H20. Papermake…

3. Activation energy and energy diagrams in order for molecules to react th reac

3. Activation energy and energy diagrams in order for molecules to react th reaction to occur. The potential energy barrier that the reacting is called the activation energy, and …

3. After reading the following sentences, answer the questions below The .amino

3. After reading the following sentences, answer the questions below The .amino acid phenylalanine has an asymmetric carbon atom. Thus there is a pair of enantiomers, D'phenylalan…

3. After reading the following sentences, answer the questions below The .amino

3. After reading the following sentences, answer the questions below The .amino acid phenylalanine has an asymmetric carbon atom. Thus there is a pair of enantiomers, D'phenylalan…

3. After you close the hatch on the international space station, the airlock reg

3. After you close the hatch on the international space station, the airlock region is a nearly perfect vacuum, so you need to start refilling that region with air. Suppose that y…

3. Alka-Seltzer in water contains principally the antacid sodium citrate and the

3. Alka-Seltzer in water contains principally the antacid sodium citrate and the analgesic sodium acetylsalicylate. The active ingredients (in each tablet) include anhydrous citri…

3. Ammonia (NH3) gas is produced from a reaction and collected over water at a t

3. Ammonia (NH3) gas is produced from a reaction and collected over water at a temperature of 21 °C. During collection, the apparatus is aligned so that the level of water inside …

3. An alternative metabolic pathway (40 points). A new strain of bacteria has be

3. An alternative metabolic pathway (40 points). A new strain of bacteria has been isolated that can use pyruvate as an energy source and that produces acetate by the pathway show…

3. An amphoteric substance is one that A. may react as an acid or a conjugate ac

3. An amphoteric substance is one that A. may react as an acid or a conjugate acid C. may react as a base or a conjugate base B. may react as a salt D. may react as an acid or a b…

3. An athlete at high performances inhales 4.0 L of air at 1.0 atm and 298 K at

3. An athlete at high performances inhales 4.0 L of air at 1.0 atm and 298 K at a respiration rate of 40 breaths per minute. a. If the exhaled and inhaled air contain 15.3% and 20…

3. An electrochemical cell at 298 K is made using a copper metal electrode immer

3. An electrochemical cell at 298 K is made using a copper metal electrode immersed in a 0.30 M copper sulfate solution in one compaltment and a copper metal electrode immersed in…

3. An experiment was conduc ammo Table 1 that of water. nium nitrate. The heat c

3. An experiment was conduc ammo Table 1 that of water. nium nitrate. The heat capacity of the calorimeter was 132 J/C. Use this information and to answer the following questions.…

3. An ordered dictionary containing 1012 data items of the form (key ,data) need

3. An ordered dictionary containing 1012 data items of the form (key ,data) needs to he stored in disk. The disk hardware allows data blocks of size b to he transferred to main me…

3. An organozine reaction (similar to a Grignard reaction) was done with 3-penta

3. An organozine reaction (similar to a Grignard reaction) was done with 3-pentanone or acetophenone with 3-bromopropane (allyl bromide) and a product isolated. The NMR of the pro…

3. An unknown sample of cu gave an absorbance of o.262 in an atomic absorption w

3. An unknown sample of cu gave an absorbance of o.262 in an atomic absorption with analysis. Then 1.00 ml of solution containing 100.0 ppm ug/mLI cu was mixed 95.0 of unknown, an…

3. Another student titrated a0.4721 g sample of unknown monoprotic acid with 0.1

3. Another student titrated a0.4721 g sample of unknown monoprotic acid with 0.10801M sodium hydroxide per theproc ll Using the firs der ivative curve, the student found the equva…

3. Answer the following questions based on the reactions written below.(9) nueli

3. Answer the following questions based on the reactions written below.(9) nueliophile (amion 01) CH3NH2 CH3NH2, ? ???? ?? 20 ? ?????.bogoo oniwello otion a. What would happen to …

3. Apply the following information about the acid ionization constants: Ka, for

3. Apply the following information about the acid ionization constants: Ka, for H2S is 1.0 x 10-7 and K for HS is 1.3 x 10-13 to predict whether NaHS (aq) is acidic, basic, or neu…

3. Aqueous nitrous acid (HONO) converts primary amines (RNH2) into diazonium ion

3. Aqueous nitrous acid (HONO) converts primary amines (RNH2) into diazonium ions (RN2). Which of the following statements is false? R-NH2 HONO a. Heating a mixture of a primary a…

3. As we discussed, the Oxygen atom of each water molecule can form two hydrogen

3. As we discussed, the Oxygen atom of each water molecule can form two hydrogen bonds with its neighbor water molecules. As each water molecule is sitting at the center of a tetr…

3. Ascorbic acid (H2C6H6O6 or HAsc), known as vitamin C, is a diprotic acid (Ka1

3. Ascorbic acid (H2C6H6O6 or HAsc), known as vitamin C, is a diprotic acid (Ka1 = 1.0 x 10-5 and Ka2 = 5 x 10-12) found in citrus fruit. Calculate [H2Asc], [HAsc-], [Asc2-], and …

3. Ascorbic acid (H2C6H6O6 or HAsc), known as vitamin C, is a diprotic acid (Ka1

3. Ascorbic acid (H2C6H6O6 or HAsc), known as vitamin C, is a diprotic acid (Ka1 = 1.0 x 10-5 and Ka2 = 5 x 10-12) found in citrus fruit. Calculate [H2Asc], [HAsc-], [Asc2-], and …

3. Assume that a nickel weighs exactly 5.0386 g. For the sets of weights listed

3. Assume that a nickel weighs exactly 5.0386 g. For the sets of weights listed below, indicate in the space provided which statement best describes the set of data: if the data a…

3. Assume that the reaction studied in Question 2 is Fe\"(aq) + 2 SCN(aq) Fe(SCN

3. Assume that the reaction studied in Question 2 is Fe"(aq) + 2 SCN(aq) Fe(SCN)'(aq) Find Kc for this reaction 10 M KSCN), concentrations of the reactants are still the same as i…

3. Assuming the activity of Cu2+(aq) is controlled by equilibrium with the solid

3. Assuming the activity of Cu2+(aq) is controlled by equilibrium with the solid phase Cu(OH)2(s): (i) Write the balanced chemical reaction. (ii) Now write a second balanced chemi…

3. At 593K a particular decomposition\'s rate constant had a value of 2.88x10^-4

3. At 593K a particular decomposition's rate constant had a value of 2.88x10^-4 and at 673K the same reaction's rate constant was 1.94x10^-3. It was noticed that when the reactant…

3. At 593K a particular decomposition\'s rate constant had a value of 2.88x10^-4

3. At 593K a particular decomposition's rate constant had a value of 2.88x10^-4 and at 673K the same reaction's rate constant was 1.94x10^-3. It was noticed that when the reactant…

3. Balance .....(is it 2 Mg) 4. Type of chemical reaction REPORT SHEET Chemical

3. Balance .....(is it 2 Mg) 4. Type of chemical reaction REPORT SHEET Chemical Reactions and Equations A. Magnesium and Oxygen 1. Initial appearance of Mg 2. Evidence of chemical…

3. Balance the following chemical equation. (5pts) MgCl2 (aq) + KOH (aq) Mg(OH)2

3. Balance the following chemical equation. (5pts) MgCl2 (aq) + KOH (aq) Mg(OH)2 KCI + 4. Based on the above balanced chemical equation, answer the following questions thcalculati…

3. Based on question 2 (above), if the BaCl2 solution used was 0.11 M, how many

3. Based on question 2 (above), if the BaCl2 solution used was 0.11 M, how many moles of BaCl2 will be left over after the reaction has completed? (4 pts) 4. What indication in th…

3. Based on the information in the table of standard reduction potentials below,

3. Based on the information in the table of standard reduction potentials below, what is the standard cell potential for an electrochemical cell that has iron (Fe) and magnesium (…

3. Based on the relational schema in Question 2 (reproduced below, with one more

3. Based on the relational schema in Question 2 (reproduced below, with one more attribute S_NAME in SUPPLIER), write SQL commands for the following problems. (Write SQL statement…

3. Based on these retention times, what does the GC results tell you. The number

3. Based on these retention times, what does the GC results tell you. The number of peaks tells you the number of substances in your sample, e.g., 1 peak means 1 substance (pure s…