If a catalyst is present in a chemical reaction, where should it be represented in the chemical equation?

If i can still dissolve more sugar into the solution at a certain temperature what would i call that solution

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

Oil rich countries in the middle east cover about 4% of earths total land area but prossess about 48% of the worlds known oil reserves what is the main reason for high concentration of reserves in this part of the world