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1. A structure composed of two or more tissues is termed: a. organ b. serous mem
1. A structure composed of two or more tissues is termed: a. organ b. serous membrane c. complex tissue d. organ system 2. The visceral pleura: a. is the …
1. A student at a university wants to determine if the proportion of students th
1. A student at a university wants to determine if the proportion of students that use iPhones is less than 0.42. The hypotheses for this scenario are as follows. Null Hypothesis:…
1. A student attempted to determine the length of each phase of the cell cycle i
1. A student attempted to determine the length of each phase of the cell cycle in a civet cell line. The student counted the number of cells in a culture and found that the number…
1. A student attempted to identify an unknown compound by the method used in thi
1. A student attempted to identify an unknown compound by the method used in this experiment. She found that when she heated a sample weighing 0.5032 g, the mass dropped to 02663 …
1. A student attempts to identify an unknown compound by the method used in this
1. A student attempts to identify an unknown compound by the method used in this experiment. She finds that when she heated a sample weighing 0.5032 g the mass barely changed, dro…
1. A student attempts to identify an unknown compound by the method used in this
1. A student attempts to identify an unknown compound by the method used in this experiment. She finds that when she heated a sample weighing 0.5015 g the mass went down appreciab…
1. A student attempts to identify an unknown compound by the method used in this
1. A student attempts to identify an unknown compound by the method used in this experiment. She finds that when she heated a sample weighing 0.4862 g the mass barely changed, dro…
1. A student came to see a professor during office hours to discuss his poor gra
1. A student came to see a professor during office hours to discuss his poor grade on the midterm exam in a graduate course on human sexuality. The professor asked the student if …
1. A student carried out a dehydration experiment using MgSO4. nH20. The student
1. A student carried out a dehydration experiment using MgSO4. nH20. The student placed an evaporating dish which contained 3.8457 g of MgSO4. nH20 in an oven at 110 °C. At this t…
1. A student carried out a dehydration experiment using MgSO4. nH20. The student
1. A student carried out a dehydration experiment using MgSO4. nH20. The student placed an evaporating dish which contained 3.8457 g of MgSO4. nH20 in an oven at 110 °C. At this t…
1. A student carried out a dehydration experiment using MgSO4. nH20. The student
1. A student carried out a dehydration experiment using MgSO4. nH20. The student placed an evaporating dish which contained 3.8457 g of MgSO4. nH20 in an oven at 110 °C. At this t…
1. A student carried out a dehydration experiment using MgSO4. nH20. The student
1. A student carried out a dehydration experiment using MgSO4. nH20. The student placed an evaporating dish which contained 3.8457 g of MgSO4. nH20 in an oven at 110 °C. At this t…
1. A student carried out a simple distillation on a compound known to boil at 12
1. A student carried out a simple distillation on a compound known to boil at 1240C and reported an observed boiling point of 1160-1170C. Gas chromatographic assay of the product …
1. A student claims that a given unknown is a carboxylic acid because the sample
1. A student claims that a given unknown is a carboxylic acid because the sample dissolves in water, 10% NaOH, and 10% NaNCO3. Critique this conclusion. 2. Explain how solubility …
1. A student club is buying 2L bottles of pop for an event. They need to get twe
1. A student club is buying 2L bottles of pop for an event. They need to get twelve bottles, and have four varieties of pop to choose from. (Cola, ginger ale, root beer, and lemon…
1. A student comments: \"if we bring the north pole of a bar magnet close to one
1. A student comments: "if we bring the north pole of a bar magnet close to one end of a current carrying solenoid and the bar magnet and the solenoid attract, then if I bring the…
1. A student comments: \"if we bring the north pole of a bar magnet close to one
1. A student comments: "if we bring the north pole of a bar magnet close to one end of a current carrying solenoid and the bar magnet and the solenoid attract, then if I bring the…
1. A student conducts an investigation to determine the heat of neutralization w
1. A student conducts an investigation to determine the heat of neutralization when 60.0 mL of 0.500 M sulfuric acid is reacted with 50.0 mL of 1.00 M sodium hydroxide. The follow…
1. A student decides to move a box of books into her dormitory room by pulling o
1. A student decides to move a box of books into her dormitory room by pulling on a rope attached to the box. She pulls with a force of 117.0 N at an angle of 16.0° above the hori…
1. A student determined percent of cr in a sample of an unknown chloride gravime
1. A student determined percent of cr in a sample of an unknown chloride gravimetrically by He dissolving 0.907 g of solid unknown in water, adding excess of AgNO3 and precipitati…
1. A student determined the absorption spectrum of a 0.1049M standard solution a
1. A student determined the absorption spectrum of a 0.1049M standard solution and then repeated the process for a solution of the same solute but with an unknown concentration (u…
1. A student determined the calorimeter constant of the calorimeter, using the p
1. A student determined the calorimeter constant of the calorimeter, using the procedure described in this module. The student added 50.00 mL of cold water to 50,00 mL of heated d…
1. A student determined the calorimeter constant of the calorimeter, using the p
1. A student determined the calorimeter constant of the calorimeter, using the procedure described in this module. The student added 50.00 mL of cold water to 50.00 ml of heated, …
1. A student determined the calorimeter constant of the calorimeter, using the p
1. A student determined the calorimeter constant of the calorimeter, using the procedure described in this module. The student added 50.00 mL of cold water to 50.00 ml of heated, …
1. A student determined the freezing point of pure t -butyl alcohol by following
1. A student determined the freezing point of pure t-butyl alcohol by following the procedure given in this experiment. Because of an experimental error, the freezing point temper…
1. A student determines the iron(II) content of a solution by first precipitatin
1. A student determines the iron(II) content of a solution by first precipitating it as iron(II) hydroxide, and then decomposing the hydroxide to iron(II) oxide by heating. How ma…
1. A student determines the molar mass of acetone, CHCOCH, by the method used in
1. A student determines the molar mass of acetone, CHCOCH, by the method used in this experiment. She found that the equilibrium temperature of a mixture of ice and water was 1.0°…
1. A student drops a 0.35-kg piece of steel at 42 C into a container of water at
1. A student drops a 0.35-kg piece of steel at 42 C into a container of water at 22 C. The student also drops a 0.53-kg chunk of lead into the same container at the same time. The…
1. A student examining a stained root tip of a fern species noted that the a roo
1. A student examining a stained root tip of a fern species noted that the a root cell contains a total of 36 chromosomes. In addition, these cells were diploid. Gender in this fe…
1. A student finds the following values from a graph between M and x in the stat
1. A student finds the following values from a graph between M and x in the static method of determining the spring constant k: x1 = 0.5 cm, x2 = 7.8 cm; M1 = 120 gm; M2 = 300 gm.…
1. A student following the procedure in this lab prepared 4 solutions by adding
1. A student following the procedure in this lab prepared 4 solutions by adding 12.25, 23.00, 25.50, and 34.50 mL of a 8.25 x 102 M NaOH solution to 50.00 mL of a 0.152 M solution…
1. A student has drawn the following thermogram for two different reactions (4 p
1. A student has drawn the following thermogram for two different reactions (4 points) Which thermogram represents an endothermic reaction? two represents a reaction with H -57.2 …
1. A student has to write a report about the causes of the rebellion in Libya fo
1. A student has to write a report about the causes of the rebellion in Libya for a Political Science class. Which source is the best place to start? Wikipedia entry about Libya N…
1. A student holding a force sensor with a string attached sits in a chair that
1. A student holding a force sensor with a string attached sits in a chair that has wheels with negligible friction. Describe how their partner must move such that the force senso…
1. A student in a statistics class needs to do a project and decides to find out
1. A student in a statistics class needs to do a project and decides to find out if the average high school GPA of students in a statistics course at her university is higher than…
1. A student incorrectly tried to add the fractions 1/5 and 2/3 by adding the nu
1. A student incorrectly tried to add the fractions 1/5 and 2/3 by adding the numerators and the denominators. The procedure was shown as: (1/5)+(2/3)=(1+2)/(5+3)=(3/8). Write the…
1. A student is asked to characterise six yeast strains labelled 1, 2, 3, 4, 5 a
1. A student is asked to characterise six yeast strains labelled 1, 2, 3, 4, 5 and 6. The student begins by streaking cells of each strain onto nine different tester media shown i…
1. A student is asked to standardize a solution of sodium hydroxide . He weighs
1. A student is asked to standardize a solution of sodium hydroxide. He weighs out 1.08 g potassium hydrogen phthalate (KHC8H4O4, treat this as a monoprotic acid). It requires 20.…
1. A student is asked to use the photoelectric effect to determine the work func
1. A student is asked to use the photoelectric effect to determine the work function and cutoff wavelength for an unknown sample. Being very lazy, however, the student turns in a …
1. A student is given a buffer that contains [HA] and [A- ]. The student is give
1. A student is given a buffer that contains [HA] and [A- ]. The student is given the concentration of [HA] and need to solve for the concentration of [A- ]. Should they titrate w…
1. A student is given a sample of a blue nickel sulfate hydrate. She weighs the
1. A student is given a sample of a blue nickel sulfate hydrate. She weighs the sample in a dry covered cru- cible and obtains a mass of 23.711 g for the crucible, cover, and samp…
1. A student is given an exam with 15 multiple choice questions. For each questi
1. A student is given an exam with 15 multiple choice questions. For each question, the student is to select the best answer from among 5 multiple choices. Let X denote the number…
1. A student is making up a buffer solution to perform an experiment on an enzym
1. A student is making up a buffer solution to perform an experiment on an enzyme. She starts with an aqueous acetic acid solution in which the following equilibrium is establishe…
1. A student measured the length, width and height of a metal block to be 2.52 i
1. A student measured the length, width and height of a metal block to be 2.52 inches by 3.25 inches by 0.69 inches. The mass was then determined to be 1.051 kg. What is the densi…
1. A student measures the conductivity of an H2CO3 solution and determines it to
1. A student measures the conductivity of an H2CO3 solution and determines it to be a weak electrolyte. The student incorrectly lists the species in solution as H+, CO3-2. Give th…
1. A student measures the potential of a cell made up with 1 M CuSO4 in one solu
1. A student measures the potential of a cell made up with 1 M CuSO4 in one solution reservoir and 1 M ZnSO4 in other. There is a metallic copper (Cu^0) electrode in the CuSO4 and…
1. A student mixes 5.00 mL 2.00 X 10~3 M Fe(NO3)3 with 5.00 mL 2.00 X 10-3 M KSC
1. A student mixes 5.00 mL 2.00 X 10~3 M Fe(NO3)3 with 5.00 mL 2.00 X 10-3 M KSCN. She finds that in the equilibrium mixture the concentration of FeSCN2+ is 1.20 X 10-4 M. Find Kc…
1. A student mixes 5.00 mL 2.00 X 10~3 M Fe(NO3)3 with 5.00 mL 2.00 X 10-3 M KSC
1. A student mixes 5.00 mL 2.00 X 10~3 M Fe(NO3)3 with 5.00 mL 2.00 X 10-3 M KSCN. She finds that in the equilibrium mixture the concentration of FeSCN2+ is 1.20 X 10-4 M. Find Kc…
1. A student mixes 5.00 mL 2.00 X 10~3 M Fe(NO3)3 with 5.00 mL 2.00 X 10-3 M KSC
1. A student mixes 5.00 mL 2.00 X 10~3 M Fe(NO3)3 with 5.00 mL 2.00 X 10-3 M KSCN. She finds that in the equilibrium mixture the concentration of FeSCN2+ is 1.20 X 10-4 M. Find Kc…
1. A student mixes 5.00 mL of 2.00 x 10-3 M Fe(NO3)3 with 5.00 mL of 2.00 x 10-3
1. A student mixes 5.00 mL of 2.00 x 10-3 M Fe(NO3)3 with 5.00 mL of 2.00 x 10-3 M KSCN. She finds that in the equilibrium mixture the of concentration of FeSCN2+ is 1.40 x 10-4 M…