C2H4 + 2O2–> 2CO2 + 2H2O A.) which element(s) are not equal on both sides?

B.) how many atoms of the incorrect element(s) are there on each side?

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

Which statement is true about ionic compounds?

This is a characteristic of the elements in the periodic table that shows a pattern. it may increase or decrease across or down the table.