The student suspected that the solution was contaminated by ethanol. The student heated the solution to the boiling point of ethanol (78 °C). Explain how this would
show whether or not ethanol was present in the copper sulfate solution.

Due to boiling of ethanol. it was in the atmosphere and contaminate with other solution.

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.

a:

by the combination of an unlimited number of elements