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Fungal laccase, a blue protein found in wood-rotting fungi, is 0.390% Cu by mass. If a fungal laccase molecule contains 4 copper atoms, what is the molar mass of fungal laccase? Please provide the correct number of significant figures!
In the TLC experiment, why must the spot be applied to the TLC plate above the level of the developing solvent
How many liters of softened water, containing a sodium concentration of 4.7×10-2 % sodium by mass, have to be consumed to exceed the FDA recommendation
write the molecular and net ionic equation for when AgNO3 and Na2CO3 are mixed. Then write the net ionic equation when each of the following stresses are applied to the same mixture.
Calculate the final temperature of 33 mL of ethanol initially at 13 degrees Celsius upon absorption of 657 J of heat. (density of ethanol =0.789 g/mL).
question 1 what is the difference between inorganic compounds and organic compounds?question 2 name the following
What is the percentage of (R)-phenylalanine present in this mixture? d. What is the percentage of (S)-phenylalanine present in this mixture?
Acid HA has a pKa = 20; acid HB has pKa = 10 Will an acid-base reaction with an equilibrium lying to the right take place if Na+A- is added to HB
When 2.45g of an unknown weak acid (HA) with a molar mass of 85.0 g/mol is dissolved in 250.0 g of water, the freezing point of the resulting solution is -0.255 C. Calculate Ka for the unknown weak acid.
the dissolution of in water is endothermic with 33.5. if you prepare a 1.00 solution of beginning with water at 22.5
The student then took 100 ml of the Mg(OH)2 solution and reacted with HCl(aq). If 13.75 ml of .010M HCL reacted with the OH-(aq), what was the concentration of hydroxide ion in the 100ml solution?
To determine the approximate mass of a small sherical shot of copper the following experiment is preformed: 125 pieces of shot are added to 7.9ml of water in a graduated cylinder and the volume becomes 8.3ml.
A student used 22.0 mL of 0.1035 M NaOH to titrate 20 mL of orange juice. How many grams of citric acid were present in the sample? The molar mass of citric acid, H3C6H5O7, is 192.12 g/mol.
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