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A family heats their house with propane gas. The gas companyreports that for an average home it takes 41.589 kJ of heat toraise the temperature of the air inside the house from 60.0 oF to 75.0 oF. How many grams of propane would be needed for the combustionreaction that would produce this amount of heat ?
Check out the structure and pertinent physical properties of THF versus diethyl ether. What necessitated the use of THF?
At 80 °C the vapor pressures of pure liquids X, Y, and Z are 385, 190, and 66 mm Hg, respectively. What pressure must be exerted on the surface of a solution
Chlorine has two isotopes, Cl-35 and Cl-37. Their abundances are 75.53% and 24.47%, respectively. Assume that the only hydrogen isotope present is H-1.
How many total moles of ions are released when the following sample dissolves completely in water? 7.24x 10^20 formula units of NiCl2.
How many moles of NaOH must be added to 0.550 L of 0.191 mol/L HC3H5O2(aq) to obtain a solution with pH=4.7? Assume the temperature is 25oC. (For HC3H5O2, pKa=4.89 at 25oC).
The mass of a cube of iron is 292 g. Iron has a density of 7.87 g/cm3. What is the mass of a cube of lead that has the same dimensions.
Benzoic acid, HC7H5O2, is a weak monoprotic acid. 10.81 g of sodium benzoate, NaC7H5O2, which is the conjugate base, is placed in a 0.500 L beaker and its pH is measured. It is found the pH of the solution is 8.69.
Write the empirical formula of at least four binary ionic compounds that could be formed from the following ions: Ca^2+, Cr^4+, Cl^-, S^2-
Draw the Lewis dot structure of phosgene. Include all 3 resonance forms by alternating the double bond among the 3 terminal atoms. Which resonance structure is best?
The enthalpy of combustion of benzoic acid (C6H5COOH) which is often used to calibrate calorimeters, is -3226.7 kJ/mol. When 3.4161 g of benzoic acid was burned in a calorimeter, the temperature increased from 20.84 to 25.67C.
what do atoms with a strong attraction for electrons they share with another atom exhibit. What are the formulas for nonpolar covalent compound, polar covalent compound, and ionic compound.
Calculate how many kilograms of H2 it takes to electrify an average home for a month. Assume there are 30 days in a month. (1 Whr of electricity = 3600 J) Standard Values
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