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Why does the temperature of a solution increase if the reaction is exothermic? For example, in the precipitation of silver iodide, delta H is -110.7 kj. Why is this reaction exothermic and why does it cause the solution temperature to increase?
A solution transmittance is 35% at 260 nm. What will the solution absorbance be if you dilute 25.0 ml
if 7.o moles of sulfur atoms and 10 moles of oxygen molecules are combined to form the maximum amount of sulfur trioxide, how many moles of which reactant remain unused at the end.
Express b in terms of the mass m of each atom and the temperature T of the gas( and other constants), given that the Boltsmann factor in P(cx) pertains to the x- component of the kinetic energy of each atom in the gas.
Calculate the pH of 0.075 M in sodium formate, NaCHO2, and 0.200 M in formic acid, HCHO2. The Ka for formic acid is 1.8x10-4
Calculate the vapor pressure lowering associated with the dissolving of 35.5 grams of sugar (C12H22O12, MM=343g/mol), in 400 grams of water at 25 degrees C. Ph2o @ 25 degrees=18.6 mmhg
Hypochlorous acid is a weak acid with pKa= 7.41 suppose a 45.00ml sample of 0.240 M HOCL solution is titrated with a 0.250 M standard KOH solution. what is the PH of the equivalence point
The vapor pressure of water above this solution is found to be 0.3630atm at 348.0 K. The vapor pressure of pure water at this temperature is 0.3804 atm. Find the value of the van't Hoff factor i for magnesium chloride in this solution.
a scientist has 200 g samples of each of the metals which are all at the same temperature then determine which metal
For the following reactants, predict the products formed (if any) and write the balanced molecular equation, complete ionic equation and net ionic equation. Ca(s)+ HCI(aq)
consider the case of sulfurous acid which is quantitatively formed when sulfur dioxide gas dissolves in water.a without
How much heat in joules is required to heat a 46 {rm g} sample of aluminum from 80 F to 146 F?
if you started a ride with ice packs that held 1300 g of frozen water at 0 rmcircc and the temperature of the water at
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