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Calculate the boiling point of water-ethylene glycol mixture

How many liters of the antifreeze ethylene glycol (C2H6O2) would you add to a car radiator containing 6.50 L of water if the coldest winter temperature in your area is -20.0 degrees C? Calculate the boiling point of this water-ethylene glycol mixture. The density of the ethylene glycol is 1.11 g/ml. The Kf and Kb of water is 1.858 and .512, respectively.

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## Q : Calculate the wave length of the photon emitted

The energy levels the electron can occupy in the H atom can be calculated using the energy level equation. Calculate the wavelength (nm) of the photon emitted when the electron goes from a n= 4.00 energy level to a n= 1 energy level.