Drops of a clear liquid are added to a red liquid. As the drops are added, the red liquid becomes orange, then yellow. Which of the following is an indicator that a chemical
reaction occurred?
A. Formation of a precipitate
B. Emission of light
C. Color Change
D. Gas formation

3&5

hope this helps <3

have a great day/night

-Dan

petroleum? coal maybe?

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.