N2, o2, and cu are elements. true false

As a part of an experiment a student burns propane to produce carbon dioxide and water she remembers that she must follow the law conservation of matter when writing a balanced chemical equation which of these equation adheres to the law of conservation of matter

How many moles of air are there in a human lung with a volume of 2.4 l at stp? explain your answer

Based on its chemical properties, identify the position of each chemical family on the periodic table.