Can someone please solve these two for me. I will give brainiest if it’s the accurate answer

the iron alone was dark brown and rectangular, whereas the iron-sulfur combination was a dark gray powder.

conduction is the transfer of thermal energy (heat in transfer) due to collisions between the molecules in the object. collisions between adjacent atoms and molecules transfer kinetic energy from the warmer to the cooler object. the objects must be in physical contact.

the answer is 0.42 is that is an option. this question provides no info