HELPP has anyone done this? I rly need help

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.

When were the exodus of farm workers during the depression

Where do most people in arabia and iraq live? a. in the fertile crescent b. in the rub, al-khali c. in cities d. in and around mecca