Which kind of galaxy has arms of gas and dust?

A. irregular galaxy

B. bar galaxy

C. sprial galaxy

D. elliptical galaxy
PLSSS HURRY

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 of the following is one way the goverment of russia is considered more limited than the goverment of the soviet union

Those with high self-esteem are highly critical of their strengths and weaknesses. true or false