-2.0 moles of a non-volatile solute was dissolved in 6.0 moles of a volatile solvent at STP. If the

-2.0 moles of a non-volatile solute was dissolved in 6.0 moles of a volatile solvent at STP. If the vapor pressure of the solution was 120 torr, what is the vapor pressure of the pure solvent at STP?160 torror480 torror120 torror360 torr2.A solution of volatile liquids, containing 4.0 moles of liquid A and 6.0 moles of liquid B, is observed to have a vapor pressure of 84 torr. Compare this to the vapor pressure expected and choose the proper description below. The vapor pressures of the pure liquids under the same conditions are: A (60 torr)

A thermometer having first-order dynamics with a time constant of 1 min is placed in a temperature bath at 100
A thermometer having first-order dynamics with a time constant of 1 min is placed in a temperature bath at 100 deg F. After the thermometer reaches steady state, it is suddenly placed in a bath at 110 deg F at t=0 and left there for 1 min, after which it is immediately returned to the bath at 100 deg F. (a) Draw a sketch showing the variation of the thermometer reading with time.(b) Calculate the thermometer reading at t=0.5 min and at t=2.0 min

The temperature of an experimental heated enclosure is being ramped up from 80 to 450 deg F at the rate
The temperature of an experimental heated enclosure is being ramped up from 80 to 450 deg F at the rate of 20 deg F/min. A thermocouple, embedded in a thermowell for protection, is being used to monitor the oven temperature. The thermocouple has a time constant of 6s.(a) At t=10 min, what is the difference between the actual temperature and the temperature indicated by the thermocouple? What is it at 60 min?(b) When the thermocouple indicates 450 deg F, the heater will begin to modulate and maintain the temperature at the desired 450 deg F. What is the actual oven temperature when the thermocouple first indicates 450 deg F?

Good morning, please help with the attached graphs below. THERMOGRAVIMETRIC ANALYSIS (TGA) ANALYTICAL CHEMISTRY PRACTICAL. The graphs below were obtained
Good morning, please help with the attached graphs below. THERMOGRAVIMETRIC ANALYSIS (TGA) ANALYTICAL CHEMISTRY PRACTICAL. The graphs below were obtained for the results of Polystyrene sample and CaCO3 sample. For each graph :CALCULATE THE PERCENTAGE LOSS, OVERALL PERCENTAGE LOSS, DECOMPOSITION TEMPERATURE, OVERALL DECOMPOSITION

A manometer is used to measure the pressure (P1) of a gas in a tank, as shown in the figure
Chemistry Assignment Writing ServiceA manometer is used to measure the pressure (P1) of a gas in a tank, as shown in the figure below. The atmospheric pressure is 765 mmHg. Assume the density of water is 1000 kg/m3 . (a) Convert the atmospheric pressure to kPa. (b) Calculate the absolute pressure in the tank, P1_abs (kPa). (c) Calculate the gauge pressure of the tank, P1_gauge (kPa).

Motor benzole is a mixture of 3 lower aromatic hydrocarbons, benzene, toluene and xylene in proportions of 75%, 15% and
Motor benzole is a mixture of 3 lower aromatic hydrocarbons, benzene, toluene and xylene in proportions of 75%, 15% and 10%. Its calorific value is 41.9 MJ/kg. A motor isrun using benzole and gives an exhaust gas which analyzes 10.7% CO2, and 1.07%CO. Calculate:a. % excess airb. Complete analysis of exhaust gas

The XRD patterns of the two intermetallics Au3Cu and AuCu3 are very different from Au. The former structures are indexed
The XRD patterns of the two intermetallics Au3Cu and AuCu3 are very different from Au. The former structures are indexed on a primitive lattice where all reflections are allowed, while Au is indexed as fcc and only reflections will all indices even or all odd are allowed. We will examine reasons for these forbidden reflections in module 4. For the purposes of this assignment, we want you to look at the atomic structure and explain the following observations:a) The most intense reflection for Au, Au3Cu and AuCu3 is (111), why? b) The reflection (100) is allowed in Au3Cu and AuC3 but forbidden for Au. c) In the rock salt structure, for example, MgO, or NaCl, the most intense refecltion is (200) while the most intense for the fluorite structure, for example CeO2, is (111). Why? d) Why is the most intense reflection for a spinel, such as MgAl2O4, the (311) reflection.

Quantitative separation of 3 . from 2 can be achieved by precipitation with hydroxide ion. Determine the range in range where
Quantitative separation of 3 . from 2 can be achieved by precipitation with hydroxide ion. Determine the range in range where the separation possible. Assume the initial condition for each ion is 0.050 . The sp for ( )3 is 37.39 and the sp for ( )2 is 12.72.

Consider the adiabatic expansion of an ideal monatomic gas with CV,m=3R/2. The initial state is described by P=9.50 bat and
Consider the adiabatic expansion of an ideal monatomic gas with CV,m=3R/2. The initial state is described by P=9.50 bat and T=273KPart ACalculate the final temperature if the gas undergoes a reversible adiabatic expansion to a final pressure of P=1.25 bar. Part B Calculate the final temperature if the same gas undergoes an adiabatic expansion against an externalpressure of P = 1.25 bar to a final pressure P = 1.25 bar.c. Explain the difference in your results for parts (a) and (b).

What is the activity of CaSO4(ssK CaSO4(s) Ca2 SO42- ) after enough dissolution has occurred so that the
What is the activity of CaSO4(ssK CaSO4(s) Ca2 SO42- ) after enough dissolution has occurred so that the reaction reaches equilibrium, assuming that not all of the solid dissolves? One gram of solid calcium sulfate [CaSO4()] is added to 1.0 L of pure water. Some of the solid then dissolves according to the following reaction, which has an equilibrium constant of eq= 10-85:Express answer to the nearest tenth (e.g., x.x)

The vapor from elemental mercury metal is a neurotoxin. The current exposure limit to mercury vapor in the U.S. is
The vapor from elemental mercury metal is a neurotoxin. The current exposure limit to mercury vapor in the U.S. is 50 micrograms per cubic meter of air for 8 hours per day and 50 weeks per year. Silver dental fillings are prepared as an amalgam, which is a mixture of silver and mercury metals. Exposure to mercury at the legal exposure limit will produce levels of about 4.053 x 1017 atoms of mercury per liter of urine. Most dentists have levels of mercury in their urine of 10 micrograms per liter (1 micro gram is 10-6 grams) which is about twice that of their patients. Does this level mean that the average dentist is at risk for mercury poisoning i.e. does this amount, 10 microgram per liter of urine represent a health threat? Show you work and justify you answer.