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Given the balanced equation representing a reacction. Determine the total number of moles of oxygen that react completely with 8.0 moles of C2H6
A sample of Oxygen is collected in a 206 mL container over water at 15C, and the barometer reads 793 torr. What volume would the dry gas occupy at 704 torr and 15C? Water's partial pressure at 15C i
A certain second-order reaction () has a rate constant of 1.65×10-3 at 27 and an initial half-life of 286 . What is the concentration of the reactant after one half-life?
Gasohol is a fuel containing ethanol (C2H5OH) that burns in oxygen (O2) to give CO2 and water. How many moles of O2 are needed to completely react with 2.50 moles of ethanol?
The half life for the first-order decomposition of sulfuryl chloride at 320ºC is 8.75 h. SO2Cl2 (g) → SO2 (g) + Cl2 (g). What is the value of the rate constant k, in s-1?
a balloon has a volume of 3.00 liters and a temperature of 56.0 celcius.if the volume increases to 7.00 lieters,what is the new temperature in celcius?
Acetylene gas (C2H2) is produced as a result of the reaction CaC2(s)+2H2O(l)-> C2H2(g)+Ca(HO)2(aq) if 13g of CaC2 are consumed in this reaction, how much H2O is needed? answer in units of moles.
Many household cleaning products contain oxalic acid, H2C2O4, a diprotic acid with the following dissociation constants: Ka1= .059 and Ka2= .000064.
In Europe, gasoline efficiency is measured in km/L . If your car's gas mileage is 30.0 miles/gal, how many liters of gasoline would you need to buy to complete a 284- km trip in Europe? Use the foll
A student mixed 5.00 mL of a nickel(2) chloride solution with 5.00 mL of .100M sodium phosphate and a precipitate formed. How many moles of sodium phospahte were present in 5.00 mL of the solution?
A bottle contains 225 mL of insulin at a concentration of 50.0 mg/mL. What is the total mass of insulin in the bottle?
Cortisol, ( M = 362.47 g/mol ), one of the major steroid hormones, is a key factor in the synthesis of protein. Its profound effect on the reduction of inflammation explains its use in the treatment
A buffer that contains 0.52 M base, B, and 0.33 M of its conjugate acid, BH+, has a pH of 8.78. What is the pH after 0.0032 mol HCl is added to 0.25 L of this solution?
Calculate the de Broglie wavelength for each of the following.a 57 g ball with a velocity of 35. m/s b an electron with a velocity 12% the speed of light.
A 2.067-g sample of a monoprotic acid was dissolved in water. It took 25.24 mL of a 0.1578 M NaOH solution to neutralize the acid. Calculate the molar mass of the acid.
What is the concentration of N2 gas at equilibrium when the concentration of NO2 is twice the concentration of O2 gas?
To 333 milliliters of a 0.120 molar Pb(NO3)2 solution, 0.667 milliliteres of 0.435 molar KIO3 is added. Calculate the concentrations of Pb+2 and IO3- in the solution at equilibrium.
What mass of sucrose should be combined with 462 of water to make a solution with an osmotic pressure of 8.30 at 270 ? (Assume the density of the solution to be equal to the density of the solvent.)
Calculate the heat of combustion of ethylene, C2H4. The bond energies are: C H 416 kJ/mol; C C 356 kJ/mol; C C 598 kJ/mol; O O 498 kJ/mol; C O 803 kJ/mol; H O 467 kJ/mol.
A testing facility found that 8.35*10^23 molecules of carbon dioxide were produced when a sample of octane was burned in air. If this combustion process is known to produce an 86.7% yield, how many
Calculate the wavelength in nm of light (Hz) illuminating a sodium surface if the threshold wavelength of sodium is 544 nm and the kinetic energy of the electron emitted is 3.00 × 10-19 J.
If you want to have a water-salt solution that freezes at -10°C, what mass of NaCl must you add to 3.0 kg of water? (Assume the van't Hoff factor, i, for NaCl is 1.85.)
How many grams of oxygen are collected in a reaction where 231 mL of oxygen gas is collected over water at a temperature of 25°C and a total pressure of 697 torr?
What mass of F2 is needed to produce 113 g of PF3 if the reaction has a 81.4% yield?