Pyrite is a mineral which is made from iron and sulfur atoms. Choose all of the statements which are correct. A. The smallest unit of pyrite is a sulfur or iron atom.

B. The smallest unit of pyrite is a molecule containing iron and sulfur.

C. All of the above

D. The element called sulfur is made of sulfur atoms.

(Be quick and pick more than one answer)

the equation that correctly represent the reaction for formation of ammonia is

n2+ 3h2 → 2nh3 (answer d)

1 mole of nitrogen gas (n2) react with 3 moles of hydrogen gas (h2) to form 2 moles of ammonia ( nh3). this is in a process known as haber process were iron is used as a catalyst and reaction take place that a higher temperature and pressure. the process is exothermic hence energy is released.