What makes metals, in particular, good conductors of electricity? a. the ability of electrons to flow throughout the metal. b. the absence of charged particles. c. the high temperatures required to break metallic bonds. d. the presence of positive and negative ions.

the answer is (A) it allows currents to flow

           Option A is correct.

Explanation:

                     Metals are good conductor of electricity. It has free electrons on their surface. According to Electron Pool Theory, each atom present in a metal crystal losses all of its valence electron and as a result a pool of free is form.

         These pool of electrons are free to move and  conduct electricity easily  while making metal as good conductor.            

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.

it is the most commonly accepted one