First, make sure to balance your equation.
3H2(g) + N2(g) ⇄ 2NH3(g)
Now, you can write your Kc expression. Remember that Kc is products over reactants, and the exponent for each product or reactant is based on its coefficient.
Kc = [NH3]^2 / [H2]^3[N2]
Reaction 3 is different from the rest and it is because a single product is synthesized.
Option 2
<u>Explanation:</u>
The reaction given in 1,2 and 4 are dissociation reaction where a single compound is getting split into two compounds. So all those three reactions are exothermic as they are breaking the bonds leading to release of energy to the surrounding. But the reaction 3 is a formation reaction, where two chemical compounds are forming a single compound.
So in this case, new bonds are formed leading to absorption of energy from the surrounding. So this is an endothermic reaction. Thus, reaction 3 is different from the rest and it is because a single product is synthesized.
5. It was evident that the marker ink is a mixture because when it was subjected to chromatography process the constituent materials which made up the marker ink got separated and appear as different bands on the chromatography paper.
6. YES, the constituents of the marker have different travelling speed, so some travel slowly while others are fast. Their travelling rates depend on the mobile phases that are used during the chromatography process.
The constituents of the marker has different travelling speed because each one of them react differently with the mobile solvent that is used. Those constituents that have high affinity for the solvent used will travel faster that those that did not.
7. The mixture travel faster in alcohol that in water. This is because the ink dissolves more in the rubbing alcohol and has higher affinity for rubbing alcohol compare with water.
8. I can improve on my RF measurement by making sure that I read to the millimeter marks when taking my readings with ruler and by making sure that I record my value to four significant figures.
Answer: Chemistry is the study of matter and the changes it undergoes.
An example of chemistry being used in the real world is how an ECG works. Chemistry is also sometimes considered the "central science". I hope this answer helped!! :)
One half of the distance between the nuclei of two atoms bonded together by a single bond is known as the covalent bond radius. When a covalent bond is present between atoms, this radius can be determined. It is the radius of the two atoms because they are equally attracted.
