Explain why for halogen ortho substituted product in benzene is the major product?

Which of these would be caused by a chemical change? a) the formation of lava. b) sedimantary rock layering over time. c) metamorphic rock forming from igneous. d) metamorphic rock eroding to form sedimentary rock.

Asolid that forms and separates from a liquid mixture is called

Which of these expressions are correct variations of the combined gas law? p1v1t2 = p2v2t1 both