When elements combine to form a mixture, the resulting chemical properties may be very different from those of the elements that make it true or false

I believe true, because it says may, but double check to make sure.

the treaty of brest-litovsk was a peace treaty signed on 3 march 1918 between the new bolshevik government of russia and the central powers (german empire, austria-hungary, bulgaria, and the ottoman empire), that ended russia's participation in world war i.