An explosion in a coal mine is blamed on the coal dust. Using the collision theory,

explain this phenomenon.

What is the number of atoms in 3.54 mol s

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

Ab c or d ? i’m not sure what the answer is