6. In the space provided below, sketch a concentration-time graph for the four shifts in equilibrium for the following chemical equation. Only graph the species indicated.
(5 marks)
i) oxygen is added ii) catalyst added. iii) temperature is increased. iv) volume in the container is
decreased v) argon gas is injected into the chamber while volume is held constant.
4NH
3(6)
+ 5021 <==> 4NO + 6H2O + energy
e)
[NH3]
[NO]
.
1)
i)
iii)
iv)
V)

answer : a model is often used to explain and make things easier to understand when any scientific topic needs to be demonstrated and explained.

as in this case where a scientist wants to use a model to present the results of his detailed scientific investigation. he should do it as it will him to make the audience understand the concept in a much better way. also, it can be changed according to new scientific understandings.

i think   the answer is c hope i'm right

each chemical family is represented as a group or column on the periodic table. based on chemical properties, there are 6 types of chemical families. group 1 represents alkali metals, group 2 represents alkaline earth metals, groups 3 to 12 represent transition metals, groups 13 to 16 represent non-metals and other metals, group 17 represents halogens and group 18 represents noble gases.