In the equation 2 Al2O3 --> 4 Al + 30%, what is the mole ratio of aluminum to oxygen?

Two things that biomedical has invented or innovated

In an investigation that uses the scientific method, which step immediately follows making a hypothesis? o summarizing the results o asking a question o making observations designing an experiment mark this and retum save and exit next submit

What is the molarity of the solution produced when 145 g of nacl is dissolved in sufficient water to prepare 2.75 l of solution?