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Mercury has the density of 13.6 g/cm3. what is the mass of a cylinder of mercury with a tube with an inside diameter of .45 cm and a height of 76.0 cm?
What is the molar mass of the enzyme if the osmotic pressure of the solution at 298K is 0.138 ATM? Note that enzymes are non-electrolytes.
Determine which of them exhibit resonance. (In other words, which of the following molecules exhibit resonance? Note: there is more than one answer and you must choose all of the molecules in the list that exhibit resonance.)
10 g potassium chlorate is decomposed producing oxygen gas and potassium chloride: 2KClO3 + heat -> 2KCl + 3O2. The actual yield of oxygen measures 3.915576 g. Calculate the theoretical amount of oxygen based on your starting mass of reactant.
A 2.00 L sample of air at -50 degreees C has a pressure of 700 torr. What will be the new pressure in torr if the temp is raised to 50 degrees C and volume is increaed to 4.00 L
Porphyrin complexes are among the most important chelating agents in nature. Which statement is correct concerning these
When 2.05 moles of a monoatomic ideal gas is reversibly heated at constant volume from 25 degrees celcius to 45 degrees celcius the entropy change of the system
What volume would be occupied by 100 g of oxygen at a pressure of 1.50 atm and a temperature of 25ºC?
What is the magnitude of the change in pH when 0.005 moles of HCl is added to 0.100 L of a buffer solution that is 0.100 M in CH3CO2H and 0.100 M NaCH3CO2?
Calculate the pH for each of the following cases in the titration of 50.0 mL of 0.190 M HClO(aq) with 0.190 M KOH(aq). The ionization constant for HClO can be found here.
What is the molarity of hydrogen ion in the above sulfuric acid solution if you assume the sulfuric acid ionizes completely? the above sulfuric acid solution is 0.07 M.
How many grams of NaCl must be added to 250g water to lower the vapor pressure by 1.30 mm Hg at 40 degrees C assuming complete dissociation?
Calculate the density. Copper (II) ion radius of 0.96A and the sulfide ion has a radius of 1.84A. Calculate the % of the cube occupied by the copper(II) sulfide.
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