Amarathon is a race that commemorates the run made by a greek soldier, pheidippides, that took place in august 490 bc. the soldier ran 26.2 mi. how many kilometers did he run? 24.6 km41.9 km16.4 km

a. 24.6
b.41.9
c.16.4

water and alcohols have similar properties because water molecules contain hydroxyl groups that can form hydrogen bonds with other water molecules and with alcohol molecules, and likewise alcohol molecules can form hydrogen bonds with other alcohol molecules as well as with water.

it should have an internal chamber and two thermometers sticking out of the top. the internal chamber will also be closed off from the outside.

chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. these processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. understanding chemical changes is a major part of the science of chemistry.

i think tornado but not 100%