Which property of a liquid is used when petrol, (gasoline), is pumped from the tank to the engine of a car? *

Check the correct box to describe the periodic trends in electronegativity. electronegativity across a period: decreases. increases. electronegativity down a group: decreases. increases.

When a spring is compressed, the energy changes from kinetic to potential. which best describes what is causing this change?

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?