Would you open an envelope that has the date of your death inside?​

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.

John lennon and paul mccartney belonged to this group

Sailors went to special school to learn how to use the new technology that would them sail far distences. the school we know about was