Can you help sort out?

Δu of , in kj/kg, as it isto k, (a)as a of , (b) at , (c) at .

Acandle’s wick is the fabric string that holds the flame, and it burns down at a constant slow pace when the candle is lit. the wick is usually surrounded by wax. which is the most important property of covalent compounds that makes them useful for making candle wax? a low boiling point a low melting point a high boiling point a high melting point

What is a number added in front of a formula in order to balance the equation