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A 20μg enzyme of molecular weight working at Vmax, catalyzes the conversion of 40μmolof substrate in 3 minutes. What is the enzyme's turnover number (in sec-1)
The molar stoichiometric ratio of nitrogen produced to ammonia reacted in the reaction equation is one to one, and the mol CO2/mol C6H12O6 = 2.
A mixture of cuso4 * 5H2O MgSO4 * 7H2O is heated until all the water is lost. If 5.020 g of the mixture gives 2,988 of the anhydrous salts, what is the percent by mass of cuso4 * 5H20 in the mixture
1. chloride ions + silver nitrate 2. hydrogen carbonate + nitric acid
How many moles of air are there in a flask with a volume of 125ml if the pressure is 745 mm Hg and the temperature is 22C
What reaction occurs with water. Calculate the pH of a 0.10 M solution of NaHSO4. If solid Na2CO3 is added to the solution of NaHSO4, what reaction occurs between the CO3- and HSO4- ions
The pH of the solution is 2.81 after 15.00ml of base is added. Calculate the ionization constant,Ka, of lactic acid.
a anaerobic bacteria living at the bottom of a shallow inlet to a salt marsh are generating hydrogen sulfide as a by
Explain what would be the effect on your calculated copper if some blue color remained when you acidified your solution
What is the theoretical concentration of the 2,6-dichloroindophenol solution? What is the theoretical volume of 2,6-dichloroindophenol needed to neutralize 10mL of the vitamin C standard solution?
what is the concentration of toluene in the air space of the bottle and what is the concentration of toluene in the water? The dimensionless Henry's Law Constant for toluene at 25 degrees C is 0.265 (mg/Lair)/mg/Lwater).
The mass spectrum of 1-ethyl-1-methylcyclohexane shows many fragments, with two in very large abundance. One appears at m/z = 111 and the other appears at m/z = 97.
Explain why BaCO3 is soluble in aqueous HCl, but BaSO4, which is used to make the intestines visible in X-ray photographs, remains sufficiently insoluble in the HCl in a human stomach so that poisonous barium ions do not get into the bloodstream.
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