Suppose the fluid in the stomach of a man suffering from indigestion can be considered to be 200.ml of a 0.033 m hcl solution. what mass of nahco3 would he need to ingest to neutralize this much hcl

Two changes are described below. a green banana turns yellow and ripens. a layer of rust forms on an iron nail. which statement is true about the two changes? a) both are chemical changes because new substances are formed. b) both are physical changes because only the physical state of the substances change. c) a is a physical change due to a change of state, but b is a chemical change because new molecules are formed. d) a is a chemical change due to a change of state, but b is a physical change because new molecules are formed.