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If it takes 0.0458 L of oxygen gas kept in a cylinder under pressure to fill an evacuated 6.96 L reaction vessel in which the pressure is 0.980 atm, what was the initial pressure of the gas in the cylinder?
Calculate the mass of ethylene glycol, C2H6O2 , that must be added to 1.000 kg of ethanol, C2H5OH, to reduce its vapor pressure by 13.2 torr at 35°C. The vapour pressure of pure ethanol at 35°C is 1.00 x 10 -2 torr.
An unknown gas having a mass of 2.041 g occupies a volume of 1.15 liters at 0.974 atm and 20 degrees Celcius. Calculate the molar mass of the unknown gas.
Calculate the amount of energy in kilojoules needed to change 423g of water ice at -10 deg c to steam at 125 deg c . The following constants may be useful:
This solution has an osmotic pressure of 2.60 atm at 25°C. If each molecule of the solute dissociates into two particles (in this solvent), what is the molar mass of this solute?
If 24.60 mL of a standard 0.3871 M NaOH solution is required to neutralize 43.87 mL of H2SO4, what is the molarity of the acid solution?
reacting 5g of salycic acid with an excess of acetic anhydride
if the activation energy is 55kJ/mol, determine the rate constant at 26 celcius. dinitrogen tetroxide decompses to nitrogen dioxide with a rate constant
find the ph of the solution at the following points in the titration: a) before any base is added b) when half the acetic acid has been neutralized c) at the equivalence pt.
How many grams of TiCl4 are needed to react completely with 155 L of H2 at 435 oC and 795 mm Hg pressure?
The half -life of 14C is 5730 years. A sample taken for radiocarbon dating was found to contain 56 percent of its original 14C. What was the age of the sample? (*Hint: The decay follows first order kinetics).
calculate both its boiling point and its freezing point in C.
Another way to reduce an aldehyde is with H2/ a metal surface . would this be an appropriate mehod to use to reduce cinnamaldehyde?
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