Hello, just wondering if anyone could help. If so thanks!!!

When the water vapor cools it condenses select a number that represents his process on the

If a molecule with a molecular formula of c13h18 is treated with an excess of h2 in the presence of finally divided pt metal under conditions required for maximum hydrogenation of the molecule to give a molecule with a formula c13h24, how many rings are in the molecule?

In what environment would mineral formation caused by high pressures and high temperatures most likely occur?