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A student prepares a weak acid solution by dissolving 0.2500 g HZ to give 100. mL solution. The titration requires 30.0 mL of 0.1025 M NaOH. Calculate the molar mass of the acid. THe answer is suppose to be 81.3 g/mol
Wavelength of light required to break C-C, C-Cl, O=O bonds - Calculate the frequency and wavelength of the least energetic photon that can break an average C-C bond. In what region of the electromagnetic spectrum is this radiation?
Write the balanced equation for the complete combustion of each of the following compounds
at conditions of 785.0 torr of pressure and 15.0 Celsius temperature, a gas occupies a volume of 45.5 Celsius what will be the volume of the same gas at 745.0 torr and 30.0 Celsius.
If this energy were used to vaporize water at 100 degrees C, how much water in liters could be vaporized? (Assume that the density of water is 1.0 g/mL.)
Calculate the molar concentration of OH - ions in an 01.33 M solution of hypobromite ion, BrO- (Kb = 4.0 10-6).
Ethylene glycol, C2H6O2 (MW=62.1mol) has a density of 40.0 mass percentage and a solution of ethylene glycol in water is 1.0514 g/mL at 20 EC. Calculate the molality of the solution
Ethanol (C2H5OH) is produced from the fermentation of sucrose in the presence of enzymes. C12H22O11(aq) + H2O(g) > 4 C2H5OH(l) + 4 CO2(g)
Twenty grams of liquid mercury at 98.0 °C is placed in 47.0 g of water initially at 25.0 °C. What is the final temperature of the water, assuming the styrofoam calorimeter absorbs no heat at all?
Calculate the change in temperature for 4.5g of CaCl2 dissolved in 90.0mL of H20. Assume that calorimeter absorbs no heat. (Ccal=0)
A 50.0g silver object and a 45.0 g gold object are both added to a 55.5 mL of water contained in a graduate cylinder. what is the new water level in the cylinder.
50.0 mL of 1.0 M HCl at 25.0 oC were mixed with 50.0 mL of 1.0 M NaOH also at 25.0 oC in a styrofoam cup calorimeter. After the mixing process, the thermometer reading was at 31.9 oC.
How many moles of NaOH would be required to completely neutralize 37.22 mL of 0.25M HCl?
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