Why is the concentration of iodine so much lower than other reactants like acetone and hcl?

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 many atoms are there in 5.70 mol of mg

What is the formula of the ionic compound composed of calcium cations and chloride anions