Answer:
50km
Explanation:
70km - 20km = 50 kilometers
Answer:
Explanation:
Let us consider the reaction:
2 NO₂ + 1/2 O₂ ⇄ N₂O₅
The rate of formation of a substance is equal to the change in concentration of the product divided the change in time:
The rate of disappearance of a reactant is equal to to the change in concentration of the reactant divided the change in time, with a negative sign so that the rate is always a positive variable.
The rate of the reaction is equal to the rate of any substance divided its stoichiometric coefficient. In this way, we can relate these expressions:
And then you jam your finger
Air is a mixture because it consists of many different molecules (e.g. oxygen, nitrogen) however these different molecules are not chemically bonded to each other, they are simply circulating in the same space altogether. Generally, the different gases can be separated from the mixture by cooling air to a temperature below zero (not sure quiet what, about 180 degrees I think) so that the mixture is liquid. The liquid mixture is then passed through into a fractionating tower and gradually heated up- this process is called fractional distillation, and essentially the different substances in the liquid air mixture are separated and collected off as they all boil off at separate boiling temperatures as the mixture is gradually heated.
Not quite sure what you mean by the homogeneous/ heterogeneous part, but I'm sure someone else will have the answer. Hope this somewhat helps!