1) To produce Na3AlF6, 14.9 kg AlO3 was mixed with 28.5 L of 15.3 M NaOH...

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1) To produce Na3AlF6, 14.9 kg Al₂O3 was mixed with 28.5 L of 15.3 M NaOH in the presence of an excess amount of HF. For an experiment in which 12.7 kg Na3AlF6 was obtained: Al2O3(s) + 6 NaOH (aq) + 12 HF (g) → 2Na³AlF6 +9 H₂O a) Determine the limiting reactant. (1 mark) b) Determine the theoretical yield (in kg). (2 marks) c) Determine the percent yield of the experiment. (1 mark) 2) An excited electron in a hydrogen atom relaxes back to the 2s orbital via emitting a photon with a wavelength of 0.434 μm. a) Find the principal quantum number for the electron at the excited level before the relaxation. (3 marks) b) If the excited electron's azimuthal quantum number is 2, write two possible sets of quantum numbers for the excited electron. (2 marks) 1) To produce Na3AlF6, 14.9 kg Al₂O3 was mixed with 28.5 L of 15.3 M NaOH in the presence of an excess amount of HF. For an experiment in which 12.7 kg Na3AlF6 was obtained: Al2O3(s) + 6 NaOH (aq) + 12 HF (g) → 2Na³AlF6 +9 H₂O a) Determine the limiting reactant. (1 mark) b) Determine the theoretical yield (in kg). (2 marks) c) Determine the percent yield of the experiment. (1 mark) 2) An excited electron in a hydrogen atom relaxes back to the 2s orbital via emitting a photon with a wavelength of 0.434 μm. a) Find the principal quantum number for the electron at the excited level before the relaxation. (3 marks) b) If the excited electron's azimuthal quantum number is 2, write two possible sets of quantum numbers for the excited electron. (2 marks)

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