I’m really behind in chemistry and my school is alpha and omega academy. If anyone could help me catch up or knows the answers plz help. I have to finish 51 assignments in 10 days

Igonna be honest i dunno that one srry

Combustion is the act or process of burning. therefore, i believe the answer is  a: burning wood. 

Answer(true);

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.