Why are experiments important in science

What is the empirical formula of c6h18o3? ch3o c2h5o c2h6o c2h5o5

Which statement describes the phase change that occurs when dry ice is placed in an open container at room temperature?

The msds for glacial acetic acid says that it is a flammable liquid that can severely burn any human tissue it comes in contact with. it reacts with bases, various metals, and strong oxidizing agents. its vapors can form explosive mixtures with air.