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What is the heat capacity of a bomb calorimeter if the combustion of 2.812 mmol of salicylic acid (C7H6O3(s), ΔHcomb = -3022 kJ/mol) increases the temperature of the calorimeter by 2.612°C?
Problem- a heat lamp produces 16.0mW of yellow light. In 5.50 h, the laser emits 1.43*10^20 photons. what is the wavelength of the heat lamp in meters. 1W= 1 J/s
How many moles of carbon, hydrogen and oxygen atoms does a mass of 32.5grams of sugar represent? How many atoms of each type are there in this mass of sugar?
Determine the molecular formula of the compound if the molar mas of the compound is 179 g/mol as determined by the mass spectrometry. Write a balanced equation for the combustion reaction and the titration. Calculate the volume (L) of oxygen at STP n..
For the reaction, Hg(aq) + 4I(aq) ? HgI4(aq), the overall formation constant of HgI4 is 1.0 x 10^30. What is the equilibrium concentration of Hg in 500.0 mL of a solution that was initially 0.01 M Hg after the addition of 65 g of KI (FW =166.0 g m..
An equilibrium mixture for the reaction above contains [H2] = 1.00 M, [N2] = 1.50 M, and [NH3] = 2.00 M. What is the value of the equilibrium constant, Kc, for the reaction?
Calculate the concentration of all the species, ions, and molecules, and the pH of the following solutions. All solutions have a total volume
Calculate the amount of acid that would be left in the water solution after four 20-mL extractions with ether. Do the same calculation, using one 80-mL extraction with ether, to determine which method is more efficient.
The acid-dissociation constant for an acid-base indicator HIn is 0.0000438. At 600 nm, the molar absorptivities are 2230 for HIn and 8900 for In-. Calculate the absorbance at 600 nm of a 1.00 x 10-4 M solution of the indicator at pH 4.81 in a 1.00..
Copper has two naturally occurring isotopes. Cu-63 has a mass of 62.939 amu and relative abundance of 69.17%. Use the atomic weight of copper to determine the mass of the other copper isotope. Express your answer using four significant figures
Under certain condition for the reaction A ? B, ?H = 14.2 kJ and ?S = 27 J/K. At what temperature in K is the reaction at equilibrium?
What can be said about the vibrational energy levels of the cabonyl group in a) ground electronic stateb) its excited electronic states
A colored substance Z has an absorption maximum at 350 nm. A solution containing 2 mg of Z per liter had an absorbance of 0.850 using a 1 cm cell. The formula weight of Z is 148.
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