Who invaded and concoured russia in the thirteenth century and with what result? a. chinese hordes b. bizantines c. muslims d. mongols

The Mongols had conquered the Russian by 1240, but in twenty years they faced problems. Split into four parts The problem was the death of the founder of the Mongol Empire, Genghis Khan, these four parts were each ruled by a son of the great leader.

is there options? or is it random words?

explanation:

a sample of water is taken and kept in a beaker in a freezer at a constant temperature of 0°c. if the system is at dynamic equilibrium, which of these statements is true?