What are the processes responsible for formation of the Martian regolith? Mechanical weathering, chemical weathering or both?

Which property is used to identify the origin of an igneous rock? color density hardness crystal size

Are these strong bases, neutral, strong acids, weak acids or weak base household bleach (ph=12.6) fluid in a car's battery (ph of less than 1.0) milk (ph=6.7) stomach contents (ph=2.2) pure water (ph=7)

Kelly ran electricity though a sample of water using electrolysis. the water changed into two gases, x and y. it was not possible to break down the gases x and y into simpler particles.