How do nicotine and tobacco cause cancer?

Which statement is a reason to support population regulation? a) it is unethical for us to control birth control rates b) humans have the freedom to produce as many children as desired c) the gap between the rich and poor has been narrowing since 1960 d) billions more people on the earth will intensify many environmental and social problems

For ai it's atomic number is 13 and it's mass number is 27 how many neutrons does it have

Which sample at stp has the same number of atoms as 18 liters of ne at stp