What is a demonstration of the law of conservation of mass

Your roll: experienced electron speech is adressed to: a new "freshman class" of electrons job: write a speech task: you are to pretend that you are giving a speech to a new group of electrons. be sure to mention their placement in an atom, their charge, and their role in chemical bonding (ionic and covalent) be specific!

In which situation can a mixture always be called a solution

How do you lengthen a pattern piece? (family and consumer science, sewing)