Both a globe and a flat world map can model feature of earth .give an example of when you would use each of these model

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?

What is the most important factor in determining climates.

What is the value of the standard enthalpy of formation of an element in its most stable form?