A zero-order reaction has a constant rate of 3.10×10−4 M/s. If after 40.0 seconds the concentration has dropped to 6.50×10−2 M, what was the initial concentration?

The number of medals awarded to the track team during the season.

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.