Can someone help me arrange this from least dense to densest

A. Silicates of metallic compound

B. Iron and nickel

C. Silicon aluminum

D. Iron and magnesium

E. Iron-rich metal alloy

F. Silicon, iron, and magnesium

Based on the law of conservation of energy, which statement is false? answer- energy is lost when machines dont work right

Evaluate this exponential expression,8. (2 + 3)2 – 42

13. a covalent bond between two atoms is likely to be polar if: a. one of the atoms is much more electronegative than the other. b. the two atoms are equally electronegative. c. the two atoms are of the same element. d. the bond is part of a tetrahedrally shaped molecule. e. one atom is an anion.