What is true for the following reaction ca(a)+2c(a)

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

How much energy is made when a pice of wood burns. how do you know

At 300 mm hg, a gas has a volume of 380 l, what is the volume at standard pressure