Which of the following correctly describes how igneous rocks are formed? A. layers of sediment are pressed down on top of each other

B. melted rock cools, either above ground or underground

C. water breaks off pieces of rocks and moves them to new locations

D. another kind of rock is exposed to a lot of pressure and heat

A. layers of sediment are pressed down on top of each other  

B. melted rock cools, either above ground or underground   Correct

C. water breaks off pieces of rocks and moves them to new locations

D. another kind of rock is exposed to a lot of pressure and heat

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.