There are many Ukraines and Krais in Russia, for example, Polskaya Ukraine. There is a Ukraine even in Moscow region. Ukraine is a Russian geographical term denoting a border area.
According to rules of English language, one should use definite article "the" to identify which Ukraine is being referred to.
From other hand, ignoring language rules is a modern norm. Therefore, using Ukraine without an article is consistent with the modern norm.
Yes, Paul Muni was born in what is now called Lviv, Ukraine.
Kiev, which is more correctly called Kyiv, is the capital of Ukraine, formerly part of the USSR, and now an independent country west of Russia.
Ukraine
not now
USSR stood for Union of Soviet Socialist Republics. There were 14 countries in the USSR. Russia was only one of them, but by far the largest and most influential. The countries returned to their original names, which they had before the USSR was formed. Russia is now The Russian Federation, since it is made up of more than just Russia. Ukraine is now Ukraine, etc. Each of the countries had a name similar to this: The Ukrainian Soviet Republic. Now is is simply Ukraine. Or the Republic of Ukraine.
The Ukraine was called the breadbasket of the Russian Empire, and of the Soviet Union. Now that it is independent, Ukraine would be called the breadbasket of the region surrounding Russia.
at war for now
Ukraine is a country itself. If you mean "Is Ukraine only in one CONTINENT?", then yes, Ukraine is only in one continent called EUROPE.
Ukraine's currency is called hryvnia, and is worth about a quarter.
Ukraine is not a capital it is a country, its capital city is called Kiev.
Hryvnia
The Chernobyl.