Chemistry concepts and calculations

a sample of nitrogen gas is placed into a container at 200k. if the temperature

a sample of nitrogen gas is placed into a container at 200k. if the temperature of the container is reduced by 100 deg C and the measured pressure decreases by 50%, how does the v…

a sample of nitrogen gasis placed into a container at 200k. if the temperature o

a sample of nitrogen gasis placed into a container at 200k. if the temperature of the container is reduced by 100 deg C and the measured pressure decreases by 50%, how does the vo…

a sample of nitrogen has a volume of 50 L at a pressure of 760 mmHg. what is the

a sample of nitrogen has a volume of 50 L at a pressure of 760 mmHg. what is the volume of the gas at each of the following pressures if there is no change in temp.?: a. 1500 mmHg…

a sample of pure benzene was found to freeze at 5.48c. a solution made by dissol

a sample of pure benzene was found to freeze at 5.48c. a solution made by dissolving 20 g of an unknown compound in 500 g of benzene was found to freeze at 3.77c. given that the m…

a sample of volume 258 cm^3 has a mass of 2.71 kg. a) is the material gaseous or

a sample of volume 258 cm^3 has a mass of 2.71 kg. a) is the material gaseous or condensed? b) if the molar mass of the material is 108 g mol^-1,calculate its molar volume for a i…

a scientist is planner her calorimetry and wants t A scientist is planning her c

a scientist is planner her calorimetry and wants t A scientist is planning her calorimeter experiment and wants to make sure that the calorimeter can withstand the heat released b…

a scientist tries to generate a mixture of gases similar to a volcano by introdu

a scientist tries to generate a mixture of gases similar to a volcano by introducing 30.0g of water vapor, 7.5 g of SO2, and 2.0 g of CO2 into a 30.0 L vessel held at 110.0C. Assu…

a series of experimental measurements of the rate measurements of the rate const

a series of experimental measurements of the rate measurements of the rate constant k for a chemical reaction were performedat different temperatures. The experimental data were e…

a series of experiments to reactant concentration on the rate of rusting for iro

a series of experiments to reactant concentration on the rate of rusting for iron metal in water. Each trial uses a 1.50 g sample of iron metal in 15.00 mL of pure water in a larg…

a session W10-Post Energy Item 12 The spring in the figure has a spring constant

a session W10-Post Energy Item 12 The spring in the figure has a spring constant ofl 1000 N/m tis compressed 17.0 cm, then launches a 200 Part A g block. The horizontal suface is …

a session.masteringchemistry.com Watch Ge UMCP TA spenvelluumd hoste. Careers4T

a session.masteringchemistry.com Watch Ge UMCP TA spenvelluumd hoste. Careers4T SigniniCopenvellu.. The Phant. Course Ha. O Masten. delta enth Exercise 10.44 with feedback e previ…

a shell is fired from the ground with an initial speed of 1.70x 10 3 m/s (approx

a shell is fired from the ground with an initial speed of 1.70x 103 m/s (approxiamatly five times the speed of sound)at an inital angle of 60.0 degrees horizontal. The acceleratio…

a signi nent-take&takeAssignmentSessionLocator;= assignment-take Use the Referen

a signi nent-take&takeAssignmentSessionLocator;= assignment-take Use the References to access important values if needed for this question. Use the pull-down boxes to specify …

a signi nent-take&takeAssignmentSessionLocator;= assignment-take Use the Referen

a signi nent-take&takeAssignmentSessionLocator;= assignment-take Use the References to access important values if needed for this question. Use the pull-down boxes to specify …

a similar experiment to the one you have performed a student is measuring the eq

a similar experiment to the one you have performed a student is measuring the equilibrium for an organic acid that is soluble in water and in cyclohexane, a nonpolar organic solve…

a small iron cube weighs 3.40g and is put in a graduated cylinder containing 12.

a small iron cube weighs 3.40g and is put in a graduated cylinder containing 12.25mL of water. the water level goes up to 12.96mL when cube is placed in graduated cylinder. what i…

a small piece of zinc reacts with dilute HCl to form H2, whichis collected over

a small piece of zinc reacts with dilute HCl to form H2, whichis collected over water at 16 degree C into a large flask. thetoral pressure is adjusted to barometic pressure (752 t…

a small tablet of aspirin contains 75mg of acetylsalycylic acid. if the chemical

a small tablet of aspirin contains 75mg of acetylsalycylic acid. if the chemical formula for ASA is C9H8O4, how many mg of carbon does it contain? a small tablet of aspirin contai…

a sodium chloride solution containing 144 g of water that has a melting point of

a sodium chloride solution containing 144 g of water that has a melting point of -1.0 C.     Above is the original MC text for this part of Problem 14.88. To solve this problem yo…

a soft Do penc to blacken the one any question one or make on this booklet. Mark

a soft Do penc to blacken the one any question one or make on this booklet. Mark your with Cor The than that ansers refo one ans to 1. to your stion. answer the Which compound adv…

a solution containing 10.0 g of an unknown solute and 90 g water has a freezing

a solution containing 10.0 g of an unknown solute and 90 g water has a freezing point of -3.33 degrees. kf = 1.86degrees C/m for water. find molar mass of unknown solute a solutio…

a solution containing four cations was analyzed by a student, using the procedur

a solution containing four cations was analyzed by a student, using the procedure described in this experiment. Based on the following results, identify cations present in the sol…

a solution is prepared by dissolving 87.4 g of iron (III) iodide in 725 ml of wa

a solution is prepared by dissolving 87.4 g of iron (III) iodide in 725 ml of water. A) what is The concentration of each ion in solution? B) what is the total concentration of io…

a solution is prepared by dissolving a 90.0 g of benzoIc acid (HC7H5O2) and 90.0

a solution is prepared by dissolving a 90.0 g of benzoIc acid (HC7H5O2) and 90.0 g of sodium benzoate (NaC7H5O2) in enough water to give total volume of 500 ml a. calculate the pH…

a solution may contain any of cation you tested for in group iii. addition of nh

a solution may contain any of cation you tested for in group iii. addition of nh3 and nh4cl a buffer 990 130 9. A solution may contain any of the cations you tested for in Group I…

a solution of aqueous ammonia was titrated with HCL using phenolphthalein as the

a solution of aqueous ammonia was titrated with HCL using phenolphthalein as the indicator a) is phenolphthalein an appropriate indicator for this titration? why or why not? b) ch…

a solution of aqueous ammonia was titrated with HCL using phenolphthalein as the

a solution of aqueous ammonia was titrated with HCL using phenolphthalein as the indicator a) is phenolphthalein an appropriate indicator for this titration? why or why not? b) ch…

a solution of butanoic acid and water (81.6% water by mass) is heated to 99.4 o

a solution of butanoic acid and water (81.6% water by mass) is heated to 99.4oC. the vapor pressures of the pure substances at this temperature are 95 torr and 744 torr, respectiv…

a solution of h2so4 with a molal concentration of 6.80 has a density of 1.318 g/

a solution of h2so4 with a molal concentration of 6.80 has a density of 1.318 g/ml. What is the molar concentration?

a solution of h2so4 with a molal concentration of 6.80 has a density of 1.318 g/

a solution of h2so4 with a molal concentration of 6.80 has a density of 1.318 g/ml. What is the molar concentration?

a solution prepared by mixing 60ml of .1m agno3 and 60ml 0f .1m tino3 was titrat

a solution prepared by mixing 60ml of .1m agno3 and 60ml 0f .1m tino3 was titrated with .2M nabr in a cell containing a silver indicator electrode and a reference electrode of con…

a solution that was 0.002M in I2 showed an absorbance of 0.84 units on an arbitr

a solution that was 0.002M in I2 showed an absorbance of 0.84 units on an arbitrary scale. the aq solution by itself was used at the control bank and set to an absorbance of 0.00 …

a solution was prepared by dissolving 2.151 g of a salt into 25.000 g of water.

a solution was prepared by dissolving 2.151 g of a salt into 25.000 g of water. It was observed that the solution temperature increased when Ehe salt dissolved. The so treezing po…

a solution was prepared by dissolving 2.151 g of a salt into 25.000 g of water.

a solution was prepared by dissolving 2.151 g of a salt into 25.000 g of water. It was observed that the solution temperature increased when Ehe salt dissolved. The so treezing po…

a solution was prepared dissolving glucose in 100g of acetic acid the solutions

a solution was prepared dissolving glucose in 100g of acetic acid the solutions boiling point is 119.81C the boiling point of pure acetic acid is 118.10C and the molal elevation c…

a spherical space colony proposed by Gerald o Neil has a diameter of 1 km . how

a spherical space colony proposed by Gerald o Neil has a diameter of 1 km . how many grams of N2 are needed to fill the interior of the colony at one atmosphere and 20 degrees a s…

a standard solution of FeSC apling A standard solution of FeSCN2 is prepared by

a standard solution of FeSC apling A standard solution of FeSCN2 is prepared by combining 9.0 mL of 0.20 M Fe(NOsh with 1.0 mL of 0.0020 M KSCN. The equation for the reaction is a…

a start up company is trying to produce its own brand of antibacterial ointment.

a start up company is trying to produce its own brand of antibacterial ointment. it decides to analyze a generic brand already on the market so that it can make suitable modificat…

a steel tank contains .500 moles of N2 at STP What is the final pressure in the

a steel tank contains .500 moles of N2 at STP What is the final pressure in the flask if an additional 2.00 g of N2 has is added to the flask and the flask is cooled to -55C a ste…

a strip of Ag was placed in a beaker containing 1.0 M AgNO3, and a strip of Co w

a strip of Ag was placed in a beaker containing 1.0 M AgNO3, and a strip of Co was put in a second beaker containing Co(NO3)2. The silver and cobalt electrodes were connected by a…

a student calibrated a beral pipet while holding it at two different angles. Whe

a student calibrated a beral pipet while holding it at two different angles. When she held the pipet horizontally, it delivered an average of 30 drops ml-1. when she held it verti…

a student carried out the experiment but did not follow the directions exacly as

a student carried out the experiment but did not follow the directions exacly as written. What effect would the following actions have on the experiment ? a. The student took a sa…

a student carries out a reduction of acetophenone, and uses IR and GC to determi

a student carries out a reduction of acetophenone, and uses IR and GC to determine that 1-phenylethanol was successfully produced A student carries out a reduction of acetophenone…

a student collected a sample of hydrogen gas by displacement of water. Volume of

a student collected a sample of hydrogen gas by displacement of water. Volume of sample = 90.0 mL Temperature = 25 C atmospheric pressure = 745 mm equilibrium vapor presssure of w…

a student collecting data in a freezing point depression lab calculates the mola

a student collecting data in a freezing point depression lab calculates the molar mass of a solid by seeing how much it lowers the freezing point of a solvent. However, she finds …

a student collecting data in a freezing point depression lab calculates the mola

a student collecting data in a freezing point depression lab calculates the molar mass of a solid by seeing how much it lowers the freezing point of a solvent. However, she finds …

a student conducts a volumetric analysis to determine the concentration of an un

a student conducts a volumetric analysis to determine the concentration of an unknown HCl solution. the student adds 25 ml of the unknown acid to a flask and then titrates with 0.…

a student constructs a coffee cup 3. A student constructs a coffee cup calorimet

a student constructs a coffee cup 3. A student constructs a coffee cup calorimeter and places 50.0 mL of water into it. After a brief period of stabilization, the temperature of t…

a student decides to prepare a standard solution of FeSCN^2+ by dissolving 8.0*1

a student decides to prepare a standard solution of FeSCN^2+ by dissolving 8.0*10^-5 moles of (FeSCN)Cl2 in a liter of water. She thinks she will end up with an 8.0*10^-5 M soluti…

a student determines the density of an unknown liquid by weighing a sample of kn

a student determines the density of an unknown liquid by weighing a sample of known volume. The reported density is found by the instructor to be significantly higher than it shou…