What is the meaning of resin and where can u use it ?

The definition of a resin is a thick and sticky clear substance made from plants or trees that is used to make plastics, pills, lacquers, inks, glues and other things. An example of a resin is the material rubbed onto the strings of a violin bow to make it easier to use.

Explanation:

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.

the answer for sodium is 0.186

the answer for rubidium is 0.251