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A student finds out the melting point of a substance to be 85.2 degrees Celsius. If accepted value is 53.7 degrees Celsius, the percent error in her determination was?
balance the following reaction. which compound is the oxidizing agent in the reaction below? which is reducing agent?
if 50.0 of ethanol density 0.789gml initially at 6.0 is mixed with 50.0 of water initially at 28.2 in an insulated
When 0.0017 moles of a weak acid are dissolved in enough water to make 0.500 L, the pH of the resulting solution is 5.97. Calculate Ka.
If this gas is brought to a final temperature of 150 degrees Celsius while the volume is held constant, what is the final pressure?
Draw the product of the reaction of cyclopentanone with chromic acid. If no reaction occurs, draw cyclopentanone. Hydride reduction (with LiAlH4 or NaBH4) of (S)-3-phenyl-2-butanone has been reported in the chemical literature and gives a mixture o..
exhibits Kc = 0.0302 at 342 K. If the standard enthalpy change for this reaction is 10.0 kJ/mol, what is the value of Kc for the following reaction
When an ant bites you, the reason it stings is because of an injection of formic acid. What is the pH when 50.0 mL of 0.1480 M formic acid (HCOOH) is titrated with 40.2 mL of 0.1841 M NaOH? PKa formic acid = 3.745.
Calculate the mass of a single particle of Na2CO3 and the number of particles of Na2CO3 in the mixture. Do the same for K2CO3.
In a carbohydrates lab experiment, define what conclusions can be drawn about the unknown solution given the subsequent test result information
a 52kg person is standing on a bathroom scale in an elevator moving upward. a if the scale reads 58kg what is the
A zero-order reaction has a constant rate of 1.70×10-4 . If after 65.0 seconds the concentration has dropped to 7.00×10-2 , what was the initial concentration?
A solution is initially supersaturated with Ca2+ and CO32- ions by rapid addition of calcium carbonate, such that the concentrations of each are 2.10x10-3M. The water's pH is held at 8.5. When equilibrium is finally reached, determine:
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