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A 1.20 gram sample of dry ice is added to a 765mL flask containing nitrogen gas at a temperature of 25.0 degrees Celsius and a pressure of 730 mmHg. The dry ice is allowed to sublime and the mixture is allowed to return to 25.0 degrees Celsius. what is the total pressure in the flask?
Why are active firefighters likely to experience the adverse health effects from inhaling 300 ppm of carbon monoxide faster than nonactive off-duty firefighters
A sample of nitrogen gas is collected over water at a temperature of 23.0 degrees Celcius. What is the pressure of the nitrogen gas if atmospheric pressure is 785 mm Hg?
Acetone (nail polish remover) has a density of 0.7857 g/cm^3. a. What is the mass, in g, of 28.56 mL of acetone? b. What is the volume, in mL, of 6.54 g of acetone?
What volume will a mixture of 0.65 mole H2 and 0.63 mole Kr occupy at 741 torr and 53.0 degrees celcuis
Assume that a particular reaction evolves 241 {rm kJ} of heat and that 33 {rm kJ} of PV work is gained by the system.
Why is the water bath used to heat the reaction? 4)What is the mechanism of the reaction of phenylmagnesium bromide and CO2? Include the workup steps. 5) In this experiment, it is important to use freshly obtained dry ice. Why?
the delta H OF vaporization for a new substance is 45 kj/mol and its delta H sublimation is 62 kj/mol, how much energy is needed for freezing 2.75 mol of a substance
how many molecules of oxygen gas are needed to react with 4.2 moles of C3H8O?
The room temperature and pressure were 23.6 deg C and 763.4 mm Hg respectively. The residue had a mass of 3.1915 grams. What was the partial pressure of oxygen?
what is the energy of an X ray with a wavelength of 3.52×10-9m and a microwave with a wavelenght of 6.63×10-2m?
Determine the freezing point of a solution which contains 0.31 mol of sucrose in 175 g of water. Kf = 1.86°C/m
barium hydroxide solution PH = 10.5 is needed. How many grams of Barium hydroxide are needed
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