How many grams of kno3 must be added to water
Assuming complete dissociation of the solute, how many grams of KNO3 must be added to 275 mL of water to produce a solution that freezes at -14.5 degrees? The freezing point for pure water is 0.0 degrees and Kf is equal to 1.86 C/m.
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Calculate the mass of air in an air-filled tire and the mass of helium in a helium-filled tire. What is the mass difference between the two?
Calculate the PV work done when 50.0 g of tin dissolves in excess acid at 1.00 bar and 25degrees Celsius. Assume ideal gas behavior.
The reactant concentration in a zero-order reaction was 7.00×10-2 M after 155 s and 1.50×10-2 M after 370 s. What is the rate constant for this reaction?
Draw the skeletal structure of the organic species containing the carbonyl functionality needed to form 2-phenyl-1-ethanol upon metal-catalyzed hydrogenation.
A 0.7549g sample of a pure hydrocarbon burns in oxygen gas to produce 1.9061g of carbon dioxide and 0.3370g of water. What is the empirical formula for the compound?
A gas mixture with a total pressure of 765 g contains each of the following gases at the indicated partial pressures: CO2, 116 mmHg ;A , 211 mmHg ; and O2 , 184 mmHg . The mixture also contains helium gas. What is the partial pressure of the heliu
A basketball is inflated to a pressure of 1.90 atm in a 24.0°C garage. What is the pressure of the basketball outside where the temperature is -1.00°C?
A generic salt, AB, has a molar mass of 243 g/mol and a solubility of 8.90 g/L at 25 C what is the Ksp of this salt.
In an ethanol-chloroform solution in which the mole fraction of ethanol is 0.20, the total vapor pressure is 304.2 torr, and the mole fraction of ethanol in the vapor is 0.138. Calculate the activity coefficients of the ethanol and the chloroform.&nb
The thermochemical equation for the combustion of butane is C4H10(g) + 13/2O2(g) --> 4CO2(g) + 5H2O(l) Delta H = -2877kJ What is the enthalpy change for the following reaction?
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