Why are rapeseed better than crambe seeds as a feedstock for erucic acid ?

Estimate the molar mass of the gas that effuses at 1.6 times the effusion rate of carbon dioxide.

What type of reaction is this equation c2h5s + o2 > co2 + h2o + so2

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.