Name the capitals of russia and the ukraine. what is the name of the capital of latvia, which also has a tradition as a baltic seaport

The capital of Russia is Moscow.  For centuries, the capital of Russia had been St. Petersburg, named after the Russian tsar Peter I.  However, after its violent transition to communism in the early 20th century, Moscow was adopted as the new capital.  It is also the largest city in Russia, with a population of close to 17 million people.  

The capital of Ukraine is Kiev.  Kiev is one of the oldest cities in eastern Europe and played an important economic role when it was encompassed by the Soviet Union.  However, Ukraine regained its independence in 1991 and Kiev is still its capital.  

The capital of Latvia is Riga, which has a tradition of an industrialized Baltic seaport.  With close to 650,000 inhabitants, Riga also happens to be the largest city in the three Baltic states of Estonia, Latvia, and Lithuania.