Dido, The mathematician. She was an ancient queen of Carthage. If she never existed, our world would have been totally different, for example, the progenitors of the founders of Rome would have been different. Maybe Rome would even not have been founded.
Let M be contained in S. Suppose the components of M are the gases m1 and m2 and S is the Earth. Determine m1 and m2 and their respective proportion in one molecule of M, if m2 is heavier than m1 and M is the most common amphoteric substance on Earth.