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Describe how the enzyme assay could still be used accurately even if maltose is already present in the test solution prior to the enzyme assay?
A gas is compressed, during which 400 J of P-V work is done on the gas. At the same time, it absorbs 150 J of heat from the surroundings. What is the change, E, in the internal energy of the gas
Ethylene glycol, antifreeze, has a density of 1.11 g/cm^3.a. What is the mass, in grams, of 410 mL of ethylene glycol?
calculate how many moles of nitrogen will be required to make 10.0 moles of nh3?radiation of wavelength 633 nm in
The KOH solution standardized is used to titrate a 20.00ml sample of sulfuric acid (H2SO4) solution of unknown concentration. Determine [H2SO4] for the unknown acid solution if 41.27mL of the NaOH solution is needed to fully react with it.
In our kinetics lab we used sodium thiosulfate as a mild reducing agent. Explain why this reagent would be a reducing agent. Also, what about potassium dichromate K2Cr2O7. Why is it such a good oxidizing agent.
Water/methanol and water/acetone are viable solvent systems for recrystallization, but water/chloroform and water/pentane are not
A buffer is prepared by adding 1.50X 10^2 ml of 0.250 M NaOH to 2.50X10^2 ml of 0.350 M weak acid, HB. The solution is diluted to 1.00 L. If the pH of the resulting solution is 6.55, what is the pKa of the weak acid
What is the freezing point of a solution containing 5.43 grams of butane (molar mass = 58.8 g/mole) dissolved in 50.0 grams of octane? The freezing point of pure octane is 25oC and the freezing point depression constant kfp is 3.42 oC/m.
Explain how you would prepare each of the following compounds from benzene:
CCl4 dipole-dipole dispersion ion-dipole ion-ion (b) CsBr dipole-dipole dispersion ion-dipole ion-ion (c) BaCl2 dipole-dipole dispersion ion-dipole ion-ion
A list of compiled anhydrous masses for Na2CO3, CaSO4, and MgSO4 and I have to find the molar ratio of these anhydrous masses. The compiled list is from every section of chemistry, Different masses for different dates for each of the anhydrates
the molar or milli or micro molar concentration of adenosine when 3ul of the 0.4 control is dissolved in 3 ml of 1 m
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