How many grams of ammonia are in the flask
A 3.00-L flask is filled with gaseous ammonia,NH3 . The gas pressure measured at 20.0 deg C is 2.05 atm . Assuming ideal gas behavior, how many grams of ammonia are in the flask?
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A mixture of KBr and NaBr weighing 0.560 gm was treated with aqueous Ag+ and all the bromide ion was recovered as 0.970 gm of pure AgBr. What was the fraction by weight of Kbr in the original sample?
A graduated cylinder contains 24.0 mL of water. What is the new water level after 38.8 {rm g} of silver metal with a density of 10.5 g/mL is submerged in the water?
You need to produce a buffer solution that has a pH of 5.02. You already have a solution that contains 10 rm mmol (millimoles) of acetic acid. H
A small parabolic reflector (dish) of revolution, referred to as a paraboloid, is now being advertised as a TV antenna for direct broadcast. Assuming the diameter of the reflector is 1meter, determine at 3GHz the directivity (in dB) of the ant
If the initial concentration of {AB} is 0.260 M, and the reaction mixture initially contains no products, what are the concentrations of {A} and {B} after 75 s?
A 32.65-g sample of a solid is placed in a flask. Toluene, in which the solid is insoluble, is added to the flask so that the total volume of solid and liquid together is 54.00 mL. The solid and toluene together weigh 58.74g . The density of tolue
A mixture of methane and ethane is stored in a container at 294 mmHg. The gases are burned in air to form co2 and h2o. if the pressure of co2 is 357 mmhg measured at the same temperature and volume as the original mixture, calculate the mole fract
Use tabulated thermodynamic data as needed to calculate ΔHf° for the reaction product in the equation shown below if ΔH° for the reaction is -79.46 kJ.
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