Russia; Georgia; Azerbaijan
Mongolia
Germany is the country located between France and Russia.
Kazakhstan is the world's largest landlocked country. It is located in Central Asia and is bordered by Russia, China, Kyrgyzstan, Uzbekistan, Turkmenistan, and the Caspian Sea.
Mongolia
Ulan Bator is the capital of Mongolia. It is located south of Russia and north of China.
Mongolia, of course!
Russia is itself a country, the largest in the world, and it has plenty of coastline, so it isn't landlocked.
Poland
The country located at 45°N 75°E coordinates is Kazakhstan. It is the largest landlocked country in the world and is situated in Central Asia, sharing borders with Russia, China, Kyrgyzstan, Uzbekistan, and Turkmenistan.
The country that is between Russia and China that borders no other countries is Mongolia. Mongolia became independent in the year 1912 after the Qing empire was overthrown.
Mongolia