When 1. 42 g of iron reacts with 1. 80 g of chlorine, 3. 22 g of fecl2(s) and 8. 60 kj of heat is produced. What is the enthalpy change for the reaction when 1 mole of fecl2(s) is produced.

i believe it is-

d.) gravity pulled particles of dust and gas together to form planets.

i don't see a text, but i am gonna assume this *orbit* the curved path, usually elliptical, described by a planet, satellite, spaceship, etc., around a celestial body, as the sun.

answersilicon (si); oxygen (o);