0.15 grams of Mg is combined with HCl to
produce H2 gas. If the reaction occurs at
25°C in a 150 ml container, what is the
theoretical pressure change?

A. 1.01 kPa
B. 102 atm
C. 102 kPa

Pretty sure it's d. heterogeneous is separated by physical properties. 

You can find the answer from the answers.com

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.