During 1811 Amedeo Avogadro ‘s hypothesis that at the same pressure and temperature equal volumes of all gases carries equalnumbers of molecules. It also distinguished that the accurate interpretation in the reaction of hydrogen with oxygen to create water, he explained the reaction showing what happens on an atomic and molecular scale using the theory of Dalton.
The Russo-Japanese War showed the United States' growing role in world affairs after US President Theodore Roosevelt negotiated and convinced the two sides to sign a peace treaty to end the war. This showed that United States has a power and large influence in most country's decisions.
A pledge to fight communism
