The vapor pressure of pure water at 55°C is 118 mm Hg. The vapor pressure of ethanol at 55°C is 144 mm Hg. What is the total vapor pressure above a mixture of 92.0 g of ethanol (CH3CH2OH, molar mass = 46.0 g/mol) and 186 g of water? 23.4 mm Hg 56.7 mm Hg 98.8 mm Hg 122 mm Hg

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Precipitate, and gas

The reaction 2kalsi3o8 + 2(h+ + hco3-) + h2o  →  al2si2o5(oh)4 + 2k+ + 2hco3- + 4sio2 shows that feldspar kalsi3o8 is chemically altered by hydrolysis to form chalky-looking clay mineral kaolinite al2si2o5(oh)4. the chemical breakdown of potassium feldspar due to exposure to acidic water results to the mineral binding with the water molecule to become kaolinite with silica and potassium and bicarbonate ions in solution.