What is true about blood alcohol concentration?

Blood alcohol concentration is the most commonly used measurement for alcohol intoxication for legal or medical purposes. It measures the amount of alcohol in the bloodstream. It is expressed in percent alcohol in blood. Hope this answers the question. Have a nice day.

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.

The answer is just took the test