When we write the formula for an ionic compound, we are merely indicating the relative numbers of each type
of ion in the compound, not the presence of molecules
in the compound with that formula. Explain.

What is impossible to do with a hypothesis

Calculate the molar mass of aluminum oxide (al2o3). express your answer to four significant figures.

The big bang nucleosynthesis theory states that elements were produced in the first few minutes of the big bang while elements have their origins in the interiors of stars, forming much later in the history of the universe.