When are roman numerals used when naming compounds?

Which is a chemical property of iron? a. it forms iron oxide (rust) when exposed to moisture and air. b. it is a gray–black metal that is hard to the touch. c. it has a melting point of 2795°f (1536°c). d. it is a good conductor of heat

What three things determine the shape and size of a puddle when water is poured out onto a surface

The missing component to the table to the right or indicated with orange letters complete the table by filling in the corresponding numbers or symbols