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Determine the numbers of calories of heat are needed to change 1 gram of water at the 100 degrees C to 1 gram of steam at 100 degrees C?
At what temperature will the pressure of the gas reach the bursting point? Eight grams of pentane gas are confined in a bulb of 1.2 liter capacity. The bulb is so weak that it burst if the pressure
A mixture of hydrogen and oxygen is analyzed by passing the mixture over hot copper oxide and through a drying tube. Oxygen reoxidizes the copper formed: Cu +½ O2 à CuO and the Hy
A mixture of water vapor and nitrogen is admitted to a flask which contains a solid drying agent. Immediately after admission, the pressure of the flask is 760 mm Hg. After standing for a period of
If the gas is stored under a pressure of 135 atm and at 298 K, A large cylinder for storing compressed gases has a volume of about 1.05 dm3, determine the numbers of moles of the gas are contained in
Determine the root-mean-square velocity, average velocity, most probable velocity, and the average kinetic energy of one helium atom. Consider the results obtained if the calculation is based on one
A gas sample is known to be a mixture of butane and ethane. A bulb of 200 cm3capacity is filled with the gas o a pressure of 750 mm Hg at 200C. Determine the mole percent of each gas in the mixture if
Describe the significance of the result obtained in (3), i.e., explain how does the mean free path compare with the diameter of methane molecule?
2.0 g of oxygen, one gram of nitrogen and the 0.85 g of helium are placed in a 3.0 dm3 flask at the 298 K. Calculate the partial pressure of each gas, the total pressure, and the composition of
Explain why was it more important to know the exact volume of acid added to the calorimeter in each reaction than to know the exact volume of NaOH added?
Explain how could you separate phenyl acetic acid from the toluene? When carbon dioxide is bubbled thru a solution of benzyl magnesium bromide, and the resulting mixture is acidified, phenyl acetic
How many grams of K20 were in the sample that was analyzed if the O2 produce from the reaction exerted a pressure of 3.23x 10 to the 3rd torr in a 10.0 mL volume at 25 degrees Celsius.
Discuss how long does it take DDT to decay from the 375 ppbm to15 p pbm in a soil sample ? A biochemist studying the break down in soil of the insecticide DDT finds that it decays by a first-order
Discuss what would then be the pressure in the bulb be, in mmHg, if the number of moles were reduced to 8.51x10e-4? Then about what temperature would the gas in the bulb need to be heated to raise t
Explain which molecule would have the most energy at 25 degrees Celsius If the above gas molecules were all moving at the same speed, put them in order of increasing temperature?
At 25 degrees Celsius a 20 L gas cylinder was brought outside to fill a 2000 L He weather balloon on a winter morning at the -10 degrees Celsius and with a pressure of 1.5 atm.
What is the V displaced by the Oxygen if atm is 738mmHgand temp is 25 Celsius and the oxygen gas from the decomposition of 1 g of KNO3 was collected over the water.
Explain what would the pressure in the bulb be, in mmHg, if the number of moles were reduced to 8.51x10e-4 mol?
Determine the minimum concentration of the Mg2+ that must be added to the 0.10 M NaF in order to initiate a precipitate of the magnesium fluoride (for MgF2, Ksp = 6.9 x10-9)
What molar ratio of CH3COOH to CH3COONa should be used, suppose you are asked to go into the lab and prepare an acetic acid -sodium acetate buffer solution with a pH of 4.00 ±0.02.
A 27.6 ml volume of chlorine gas is collected over water at the 23C and 750 torr. The vapor pressure of water is 21 torr. The mass of the gas is 78.4 mg.
Determine the numbers of pounds of carbon dioxide are produced from burning one gallon of gasoline? Assume gas is 100% octane and the density of octane is 0.78 g/ml. Demonstrate the balanced reacti
Diacetyl consists of the 7.03% H, 55.8% C and 37.17%O in gaseous state at the 100C and 747torr, a .3g sample occupies vol of 111ml.
The vessels through which materials are exchanged with the interstitial fluid are: The chamber of the heart that receives deoxygenated blood from the body is the:
The vessel that transports oxygenated blood towards the heart is the, The vessel that transports oxygenated blood away from the heart is the: