What were the three main goals of the lewis and clark expedition

24-karat gold is considered to be pure gold. 18-karat gold is considered to be about 75% gold. what is 18-karat gold considered a mixture rather than a pure substance? a) it has a variable composition of other elements and minerals. b) its color is different than pure gold. c) the gold atoms are not arranged in a repeating pattern. d) it can be melted and transformed into a different substance.

Which groups of people most directly benefited from song innovations in the song dynasty‘s open border policy?

During the late 19th century, russia's settlement and development of siberia was made possible by the invention of the