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The standard enthalpy of combustion of solid urea (CO (NH2)2) is -632 kl mol-1 at 298 K and its standard molar entropy is 104.60 J K-1 mol-1, Calculate the standard Gibbs energy of formation of urea at 298 K.
What is the Vmax of this enzyme when enzyme concentration is equal to 0.2mg/mL? I understand the equation to find kcat is: kcat = Vmax/[E]t however,
When 5.00 g of fructose, C6H12O6, (FW 180.16 g/mol) is burned in a calorimeter whose heat capacity is 29.7 kJ/oK, the temperature increases by 2.635oK. Calculate the heat of combustion of fructose in kJ per mole.
When sodium carbonate dissolves in water, the carbonate ion CO3^2- acts as a base. write a balanced equation for the reaction of the carbonate ion with water.
A 2.60 mole quantity of NOCl was initially in a 1.50 L reaction chamber at 400°C. After equilibrium was established, it was found that 22.0 percent of the NOCl had dissociated
Refer to the Galvanic cel below (the contents of each half-cell are written beneath each compartment):
A helium-filled weather balloon has a volume of 2.4 × 102 L at 99 kPa pressure and a temperature of 0°C. What is the mass of the helium in the balloon?
A sample of an ore of iron, hematite, is 56% Fe2O3. How much iron is there in 2 kilograms of the ore?
Describe how chemical labeling and crystal structures can be used to determine residues important
A solution is prepared by dissolving 294 g of sucrose (C12H22O11) in 624 g of water. What is the vapor pressure of this solution at 30°C? (The vapor pressure of water is 31.8 mmHg at 30°C.
Describe, in detail, how you would separate a mixture of ammonium chloride, NaCl, and sand. Will you be using chemical methods. Explain.
Calculate the Ka for the acid. The initial concentration of the acid is 0.010m?
As it expands, it does 135.8 J of work on its surroundings at a constant pressure of 783 torr. What is the final volume of the gas?
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