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The following data were obtained on the rate of lactose decomposition as a function of acid and lactose concentration. Using this information, determine the rate law expression and the value of rate constant for the acid-based hydrolysis of lactose.
Run [lactose]o (M) [H+]o (M) Initial rate (1/M·s)
1 0.01 0.001 0.00116
2 0.02 0.001 0.00232
3 0.01 0.004 0.00464
The reported values for one compound (CaHbOc) were as follows: mass: 214.1360 g/mol; percent C and H: 84.07 and 8.47, respectively. Determine the molecular formula of the compound.
The NaHCO3 is the limiting reactant and the HCl is the excess reactant in this experiment. Determine the theoretical yield of the NaCl product.
Iodine-131 is used in the form of sodium iodide to treat thyroid cancer. The isotope has a 1/2 life of 8.05 days
What is the freezing point of a solution of ethylene glycol, a nonelectrolyte, that contains 81.0 g of (CH2OH)2 dissolved in 505 g of water?
Methane has a Henry's Law constant (k) 9.88x10^-2 mol/Latm when dissolved in benzene at 25degrees C. How many grams of CH4 will dissolve in 3.00L of benzene if partial pressure is 1.48atm?
An enzyme-catalyzed reaction produces a product that has a maximum absorbance at 412 nm. The extinction coefficient is 4000 M^-1 cm^-1. A 10-to-1 dilution of the enzyme is made and 20 microliter of the dilution are put into a cuvette with 80 micro..
What is the heat of formation of NaOH which molarity is 2.02? If heat of formation of NaON, which molarity is M 1.00, -469.6, is heat of formation
A multiple series dilution was performed. The sample was diluted 1/5, 1/2, 1/4, 1/2. What is the final dilution
In a calorimeter of capacity =0, you mix 50g of water at 80°C with 100g of water at 10°C. What is the final temperature
Assume 1.00 mL = 1.00 g What numerical value will be used for the moles on the right hand side of the equation above?
Indicate the solubility of the following solutes in 100 g of water
How many grams of magnesium chloride could be formed from the reaction of 6.82 g of magnesium with excess HCl?
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