17) Why is 18-karat gold considered a mixture rather than a pure substance? A) It has a variable composition. B) Its color is different than pure gold. C) The gold atoms are not arranged in a repeatin
17) Why is 18-karat gold considered a commutation rather than a sheer essential? A) It has a inconstant adjustment. B) Its complexion is contrariant than sheer gold. C) The gold atoms are not stereotyped in a repeating mould. D) It can be melted and transformed into a contrariant essential.