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A gas vessel is attached to an open-ended manometer filled with a nonvolatile liquid of a density 0.993 g/mL. the difference in height of the two liquids is 32.2 cm @ 765 mmHg. Given the density of Hg is 13.6 g/mL, what is the pressure of the enclosed gas (in mmHg)?
the stretomycin has an osmotic pressure of 8.72mmHg at 23.6 degrees C, what is the molecular weight of the antibiotic?
Calculate the volume of oxygen,measured at STP, produced by the decompistion of 2.87 g of potassium chlorate.
Calculate the mass of ammonium chloride that must be added to 500.0 mL of 0.32 M NH3 to prepare a pH 8.50 buffer; Kb for NH3 is 1.8 × 10-5.
Calculate what quantity of potassium chlorate that has molecular weight of 122.5 needed to form 33.6 litres of oxygen? Express your answer in grams and assume that temperature and pressue will be in normal condition?
What volume of water should be added to 600 mL of ethanol in order to have a solution that boils at 95 degrees Celsius? (For ethanol, Tb=78.4 degrees Celsius, Kb=1.22 degrees Celsius and d= 0.789 g/ml. For water d= 1.00 g/m
the oxidation of nitric oxide to nitrogen dioxide is2nog o2g reg 2no2gif 100.0 ml of no at stp reacts with 400.0 ml of
Balance the equations and indicate the type of reaction. CaO+ HCl -> CaCl2 +H2O. and also, Fe + O2 -> FE2O3
A large flask is evacuated and weighed, filled with argon gas, and then reweighed. When reweighed, the flask is found to have gained 3.219 g. It is again evacuated and then filled with a gas of unknown molar mass. When reweighed, the flask is foun..
The combustion of pentane with oxygen is a well known process. Write a balanced equation for the reaction of pentane, C5H12, with oxygen, O2, forming the products carbon dioxide, CO2, and water, H2O. What mass of carbon dioxide will be produced by..
If a container having a volume of 322mL at 25.o degrees celcius was to suddenly reduce to 75.0mL, what would be the new temp.(n,p constant)?
a chemistry student prepares acetone by decomposing 12.3 g of calcium acetate. if the student collected 2.50 g of
using equations explain how a buffer functions. buffers consist of a solution of a weak acid ha and its conjugate base
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