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@X@user.full_name@X@ @GMU: When an electron is initially in a higher energy orbital and transitions to a lower energy orbital the difference in energies of the two orbitals is the energy of the light emitted. Which transition for hydrogen occurs at the highest energy?

@X@user.full_name@X@ @GMU: A flexible container was filled with 0.1125 mol of CO at a volume of 15.17 L. How many moles of this gas would there be if the volume increased to 25.78 L? Assume pressure is constant.

@X@user.full_name@X@ @GMU: A gas mixture contained 56.82% by weight HBr and 43.18% C2H6. What was the mole fraction of HBr?

@X@user.full_name@X@ @GMU: An unknown gas effused through a porous membrane 1.659 times slower than HI. What is the molecular mass of the unknown gas?

@X@user.full_name@X@ @GMU: Draw the lewis dot structure of CO2. How many lone-pairs of electrons (first) and bonding pairs of electrons exist on the molecule CO2?

@X@user.full_name@X@ @GMU: The density of a particular gas is 0.6492 g/L at 740.28 mm Hg and 20.11 °C. Which gas is it?

@X@user.full_name@X@ @GMU: What is the mole fraction of HCN in a mixture of 16.98 g of HCN and 45.8931 g of HI?

@X@user.full_name@X@ @GMU: How much work has been done when the volume of a gas changes from 19.28 L to 13.79 L at a constant pressure of 1.849 atm and temperature?

@X@user.full_name@X@ @GMU: Assume you have an open ended manometer filled with an oil having a density of 0.7791 g/mL at 20°C rather than mercury (density = 13.546 g/mL at 20°C). What is the pressure in atmospheres if the level of the arm open to the atmosphere is 134.78 cm higher than the level in the arm connected to the gas sample? The atmospheric pressure reading is 758.94 mm Hg.

@X@user.full_name@X@ @GMU: How much work has been done when the volume of a gas changes from 16.85 L to 23.54 L at a constant pressure of 2.868 atm and temperature?