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Why is tetraphenylporphyrin (TPP) so stable? Why is it planar? Why does it precopitate so easily?
What is the molarity of a HCl solution that contains 6.13 g of HCl in 352 mL of solution?
At constant temperature and pressure, how many liters of oxygen would be needed to completely combust 0.350 L of propane?
Given the reaction 4Al(s)+302(g)--2Al2O3(S), what is the minimum number of moles of oxygen gas required to produce 1.00 mol of aluminum oxide?
After heating, the remaining solid weighed 0.427 g. Assuming all the CaCO3 broke down to CaO and CO2, calculate the mass percent of CaCO3 in the original mixture.
A .647 L sample of hydrogen chloride (HCl) gas at 1.12 atm and 23°C is completely dissolved in 885 mL of water to form hydrochloric acid solution. Calculate the pH of the solution.
What is the pH of a solution which results from mixing 150 mL of 0.50M acetic acid and 150 mL of 0.50M sodium hydroxide at 25oC?
A calorimetry experiment determined that the combustion of 1.01 g of H2 reacting with excess O2 producing H2O gave q=143 kJ. Calculate the change in enthaply.
A noble gas with a mass of 13.1 g occupies a 2.5 L container at a pressure of 3.2 atm at 298 K. What is the identity of the noble gas
if 8.40 grams of C are burned, how much heat will be released for the following balanced reaction: C + O2 -> CO2 + heat (393 KJ)
A compound contain 60.87% carbon, 4.38% hydrogen, and 34.75% oxygen then determine its empirical formula?
During the combustion of 5.0 g of octane, C8H18, 239.5 kcal is released. How many grams and how many moles of octane must be burned to release 450 kcal?
Using 80.0g of Methane and 16.3g of Water, how many liters of H2 can be produced at STP? What is the limiting reactant?
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