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Question #7. In replicating a chemistry experiment, a student isolated the following masses of silicon dioxide,...
1. a) A student hangs three masses from a force table. If the first mass of...
1. a) A student hangs three masses from a force table. If the first mass of 250 g is at an angle of 130°, and she then hangs a mass of 205 g at 225°, calculate the mass and angle of the third mass so that the ring on the force table is in equilibrium? For maximum credit, show your work. Assume the given masses include the mass of the hangers b) the attached sheet of graph paper, represent the...
1. a) A student hangs three masses from a force table. If the first mass of...
1. a) A student hangs three masses from a force table. If the first mass of 193 g is at an angle of 164, and she then hangs a mass of 243 g at 259°, calculate the mass and angle of the third mass so that the ring on the force table is in equilibrium. For maximum credit, show your work. Assume the given masses include the mass of the hangers. b) On the attached sheet of graph paper, represent...
IMENTAL PROCEDURES AND DATA it A Micropipetting 2 The student has used a micropipette to add...
IMENTAL PROCEDURES AND DATA it A Micropipetting 2 The student has used a micropipette to add five 250 ml aliquos to: braker and recorded the masses below. 3) Determine the mass of EACH individual sample through subtraction) 4) Calculate the mean, standard deviation, and RSD for the mass of water. Mass of clean, dry beaker = 91.4536 Sample 1 2 3 Total Mass 91.7025 91.962 92.2168 92.454g 92.704 g Sample Mass .249g .5099 1.509 9 1.001 q 1. 2519 4...
a. Ms. Newell gave her class a 10-question multiple-choice quiz with 4 choices. Let X =...
a. Ms. Newell gave her class a 10-question multiple-choice quiz with 4 choices. Let X = the number of questions that a randomly selected student in the class answered correctly. The mean and standard deviation of X are 7.6 and 1.32 respectively. To determine each student’s grade on the quiz, Ms. Newell will multiply his or her number of correct answers by 10. Let RV ‘G’ be the grade of a randomly chosen student in the class. i. Calculate the...
Use your completed table from part 4b to find the probability that a student correctly answers...
Use your completed table from part 4b to find the probability that a student correctly answers at least one question correctly on the pop quiz. Show your calculations for the answer. Number Correct 0 1 2 3 4 5 6 7 8 Probability 0.1001 0.2670 0.3114 0.2076 0.0865 0.0231 0.0038 0.0004 0.0000 Calculate the mean and standard deviation of this probability distribution. Show your work using the binomial mean and standard deviation formulas and provide your answers with units (rounded...
2. Using the data from the experiment, calculate the mass of copper (II) sulfate residue and...
2. Using the data from the experiment, calculate the mass of copper (II) sulfate residue and the mass of water (Items 5 and 6 from the Data Form). Express your answers in grams to the nearest hundredth (+ 0.01 g). Show your work. 3. Calculate the moles of copper (II) sulfate present from the mass of the copper (II) sulfate. Express your answer in moles as three significant digits. Show your work. 4. Calculate the moles of water driven off...
2. Carly the chemistry student performs an experiment with vinegar (active ingredient acetic acid, CH,COOH) and...
2. Carly the chemistry student performs an experiment with vinegar (active ingredient acetic acid, CH,COOH) and baking soda (NaHCO3). Her professor asks her to place varying amounts of baking soda and vinegar into sealable plastic bags, quickly seal the bags, and observe the reaction. The balanced chemical equation for the reaction is given here NaHCO3(aq) + CH.COOH(aq) → CO2(g) + H20(1) - NaCH,COO(aq) a) Use limiting reagent calculations to fill in the following table. Please show your work Trial Baking...
A B Question 7 - Rank by force Three balls, with masses of 4m, 2m, and...
A
B
Question 7 - Rank by force Three balls, with masses of 4m, 2m, and m, are equally spaced along a line. The spacing between neighboring balls is r. We can arrange the balls in three different ways, as shown in the figure. In each case, the balls are in an isolated region of space very far from anything else. 2m 4m 4m 2m Question A T> >3 1>2=3 1>3>2 2>1>3 2>1=3 2>3>1 3>1>2 3>1=2 3>2>1 All equal 2m...
PLEASE SHOW YOUR WORK STEP BY STEP An article in Nature describes an experiment to investigate the effect on consuming chocolate on cardiovascular health ("Plasma Antioxidants from Chocolate,"...
PLEASE SHOW YOUR WORK STEP BY STEP
An article in Nature describes an experiment to investigate the effect on consuming chocolate on cardiovascular health ("Plasma Antioxidants from Chocolate," 2003, Vol. 424, pp. 1013). The experiment consisted of using three different types of chocolates: 100 g of dark chocolate, 100 g of dark chocolate with 200 ml of full-fat milk, and 200 g of milk chocolate. Twelve subjects were used, seven women and five men with an average age range of...
Calculate the theoretical yield and percent yield for experiments 7, 8, and 9. For experiment 9,...
Calculate the theoretical yield and percent yield for
experiments 7, 8, and 9. For experiment 9, determine the
theoretical yield based on starting with 0.50g of 3-nitrobenzoic
acid. Show work
Acid I (experiment 7): Weight of methyl 3-nitrobenzoate = 1.9
g
Acid II (experiment 8): Weight of 3-nitrobenzoic acid = 1.75
g
Acid III (experiment 9): Weight of 3-nitrobenzamide = 0.30 g
Experiment 7:
-2.5 mL concentrated H2SO4
-1.75 mL concentrated HNO3 (16M)
-2.1 mL concentrated Methyl Benzoate
Experiment 8:...
1. a) A student hangs three masses from a force table. If the first mass of 250 g is at an angle of 130°, and she then hangs a mass of 205 g at 225°, calculate the mass and angle of the third mass so that the ring on the force table is in equilibrium? For maximum credit, show your work. Assume the given masses include the mass of the hangers b) the attached sheet of graph paper, represent the...
1. a) A student hangs three masses from a force table. If the first mass of 193 g is at an angle of 164, and she then hangs a mass of 243 g at 259°, calculate the mass and angle of the third mass so that the ring on the force table is in equilibrium. For maximum credit, show your work. Assume the given masses include the mass of the hangers. b) On the attached sheet of graph paper, represent...
IMENTAL PROCEDURES AND DATA it A Micropipetting 2 The student has used a micropipette to add five 250 ml aliquos to: braker and recorded the masses below. 3) Determine the mass of EACH individual sample through subtraction) 4) Calculate the mean, standard deviation, and RSD for the mass of water. Mass of clean, dry beaker = 91.4536 Sample 1 2 3 Total Mass 91.7025 91.962 92.2168 92.454g 92.704 g Sample Mass .249g .5099 1.509 9 1.001 q 1. 2519 4...
2. Using the data from the experiment, calculate the mass of copper (II) sulfate residue and the mass of water (Items 5 and 6 from the Data Form). Express your answers in grams to the nearest hundredth (+ 0.01 g). Show your work. 3. Calculate the moles of copper (II) sulfate present from the mass of the copper (II) sulfate. Express your answer in moles as three significant digits. Show your work. 4. Calculate the moles of water driven off...
2. Carly the chemistry student performs an experiment with vinegar (active ingredient acetic acid, CH,COOH) and baking soda (NaHCO3). Her professor asks her to place varying amounts of baking soda and vinegar into sealable plastic bags, quickly seal the bags, and observe the reaction. The balanced chemical equation for the reaction is given here NaHCO3(aq) + CH.COOH(aq) → CO2(g) + H20(1) - NaCH,COO(aq) a) Use limiting reagent calculations to fill in the following table. Please show your work Trial Baking...
A
B
Question 7 - Rank by force Three balls, with masses of 4m, 2m, and m, are equally spaced along a line. The spacing between neighboring balls is r. We can arrange the balls in three different ways, as shown in the figure. In each case, the balls are in an isolated region of space very far from anything else. 2m 4m 4m 2m Question A T> >3 1>2=3 1>3>2 2>1>3 2>1=3 2>3>1 3>1>2 3>1=2 3>2>1 All equal 2m...
PLEASE SHOW YOUR WORK STEP BY STEP
An article in Nature describes an experiment to investigate the effect on consuming chocolate on cardiovascular health ("Plasma Antioxidants from Chocolate," 2003, Vol. 424, pp. 1013). The experiment consisted of using three different types of chocolates: 100 g of dark chocolate, 100 g of dark chocolate with 200 ml of full-fat milk, and 200 g of milk chocolate. Twelve subjects were used, seven women and five men with an average age range of...
Calculate the theoretical yield and percent yield for
experiments 7, 8, and 9. For experiment 9, determine the
theoretical yield based on starting with 0.50g of 3-nitrobenzoic
acid. Show work
Acid I (experiment 7): Weight of methyl 3-nitrobenzoate = 1.9
g
Acid II (experiment 8): Weight of 3-nitrobenzoic acid = 1.75
g
Acid III (experiment 9): Weight of 3-nitrobenzamide = 0.30 g
Experiment 7:
-2.5 mL concentrated H2SO4
-1.75 mL concentrated HNO3 (16M)
-2.1 mL concentrated Methyl Benzoate
Experiment 8:...
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