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A 0.1946 g piece of magnesium metal is burned in a constant volume calorimeter that has a heat capacity of 1349 J/°C. The calorimeter contains 500 g of water and the temperature rise is 1.40°C. Calculate the heat of combustion of magnesium metal in kJ/g.
Write down the electron configurations for C2 and F2. What is the bond order for each? Which one is likely to have larger bond dissociation energy.
If the methane contained in 4.00 of a saturated solution at 25 was extracted and placed under STP conditions, what volume would it occupy?
12.0 moles of gas are in a 8.00 L tank at 23.2 C. Calculate the difference in pressure between methane and an ideal gas under these conditions.
A bottle containing 335 of cleaning solution is used for carpets. If the cleaning solution has a specific gravity of 0.850, what volume of solution was used?
Assume that a reaction takes place at 296 K and 306 K. What must the activation energy be for the rate constant to double as described.
Consider the cell described below: Al| Al3+ (1.00 M) || Pb2+ (1.00 M) | Pb Calculate the cell potential after the reaction has operated long enough for the [Al3+] to have changed by 0.60 mol/L.
if a raindrop weighs 65 mg on average and 5.1x10^5 raindrops fall on a lawn every minute what mass in kg of rain falls in 1.5 hours
a 35.00 mL sample of NaOH solution is titrated to an endpoint by 14.76 mL of 0.4122M HBr solution, what is the molarity of the NaOH?
A tightly sealed 5.0 L flask contains argon at 69.0 deg. C and 781 mm Hg. The flask is heated until the pressure is doubled. What it the temperature of the gas.
What mass of sucrose should be combined with 464g of water to make a solution with an osmotic pressure of 8.60atm at 280K? (Assume the density of the solution to be equal to the density of the solvent.)
What mass of Fe(OH)3 would be produced by reacting 75.0mL of a 0.0810M Fe(NO3)3 solution with 125 mL of a .150 M NaOH solution.
Find the pH solution & Hydronium ion concentration and What is the pH of a solution of 0.17 M acid and 0.81 M of its conjugate base if the pKa = 8.62?
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