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Calculate the minimum number of grams of propane, C3H8(g), that must be combusted to provide the energy necessary to convert 3.28 kg of ice at -11.0°C to liquid water at 80.0°C.
Which one of the following salts, when dissolved in water, produces the solution with the highest pH. and WHY. KCl, KF, KI, KBr
The half-equivalence point of a titration occurs half way to the end point, where half of the analyte has reacted to form its conjugate, and the other half still remains unreacted. If 0.560 moles of a monoprotic weak acid
if you used 8900 kilojoules you expend in energy in one day to heat 49000g of water at 19 C what would be the rise in temperature.
sodium hydrogen carbonate (NaHCO3) is mixed with 10.0 grams of sodium carbonate in enough de-ionized water to give a total volume of 250.0 ml. What is the pH of the resulting solution
How many isomers are there for the trifluorotrinitrocobalt (III) complex? Draw them. Are any enantiomers. Label each structure with an appropriate descriptor
Use the distance between the charges (the spring length) BEFORE contraction to get the spring force (using coulomb's law) and divide that by the distance that it contracted to get the spring constant OR
The enthalpy of vaporization of carbon tetrachloride is +30.0 kJ/mol at its normal boiling temperature of 80.7 K. Calculate the vapor pressure at 100 K
At 20 degrees celsius the vapor pressure of ethanol is 45 torr and the vapor pressure of methanol is 92 torr. what is the vapor pressure at 20 degrees celsius of a solution prepared by mixin 26.0 g. of methanol and 85 g. of ethanol?
Calculate the solubility of copper (II) iodate in 0.56 M copper (II) nitrate. Ksp* is 7.4x10-8 M3.
A ground state hydrogen atom absorbs a photon of light having a wavelength of 92.30 nm. It then gives off a photon having a wavelength of 1820 nm
How many grams of dry NH4Cl need to be added to 2.30L of a 0.800 M solution of ammonia, NH3, to prepare a buffer solution that has a pH of 8.83? Kb for ammonia is 1.8 * times 10^-5
A pH of 3.74 is reached when 18.50 mL of sodium hydroxide has been added to the acid solution. What is the molar mass of formic acid given this data?
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