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Vapor pressure of water at 25 deg C is 24 mmHG and that of pure methanol is 120 mmHG. What is the vapor pressure above the solution of methanol and water at 25 deg C? What is the mole fraction of methanol in the vapor above this solution?
Using the ?H for the reaction of NaOH + HCl and the reaction of NaOH + NH4Cl How do you calculate an enthalpy change for reaction of HCl + NH3?
An environmental engineer analyzes a sample of air contaminated with sulfur dioxide. To a 500m mL sample of air at 700 torr and 38 degrees celsius, she adds 20.00 mL of 0.01017 M aqueous iodine, which reacts as follows
The volume of a single molecule of water is 2.99 x 10^-23 mL. For a sample of gaseous water at 1.00 atm and 150° C, what fraction of the containers volume is occupied by the molecules themselves
Electromagnetic radiation with a wavelength of 665 nm appears as orange light to the human eye. The energy of one photon of this light
In the reaction of nickel with concentrated nitric acid, the products are nickel (III) nitrate, water and nitrogen monoxide, sometimes called nitric oxide. How many grams of nickel reacted
Compute the change in temperature when 1.8 g of sodium chloride is dissolved in 300.0 mL of water initially at 20C. The heat capacity of water is 4.184 J/mL/K.
What volume of CO2 (g) at STP is formed when 6.00 g of cyclopentadiene, C5H6 (g) is fully oxidized
Its composition is 17.01% Na, 47.46% S and 35.52% O by mass. Determine its empirical formula. If the Molar mass of sodium tetrathionate is 272. What is its actual formula? Na2S2O3 + I = NaxSx + 2Nal
Commercial vinegar was tritrated with NaOH solution to determine the content of acetic acid (HC2H3O2). For 20.0 milliliters of vinegar, 32.0 milliliters of 0.500 molar NaOH solution was required. What was the concentration of acetic acid in the vi..
The radioisotope 224Ra decays by a emission primarily to the ground state of 220Rn (94% probability) and to the first excited state 0.241 MeV above the ground state (5.5% probability). What are the energies of the two associated a particles
Assume that the metal rack is cooled from 240°F to 85°F, the temperature of the outlet water. The amount of heat removed from the retort walls in cooling from 240 to 100°F is 10 000 btu. Radiation loss from the retort during cooling is estimated a..
The pressure on a balloon holding 350 mL of an ideal gas is increased from 254 torr to 1.00 atm. What is the new volume of the balloon (in mL) at constant temperature?
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