PV = k, where Pis pressure, Vis volume, and k is a constant
Question 1
Suppose you have a gas in a container being pressed down by a piston. The initial volume of the gas is 5.0 m3 and
the pressure is 7.5 mmHg. If the volume decreases to 4.0 m, what is the pressure? (The product of the volume and
pressure remain constant.)
(5.0 m)(7.5 mmHg) = (P)(4.0 m)

Ibelieve your answer is true 

Is there an image with it

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.