These are called resistors.
Molar mass NH4Cl = <span>53.491 g/mol
number of moles solute :
n = m / mm
n = 20 / 53.491
n = 0.373 moles
solvent in kg :
13.9 / 1000 => 0.0139 kg
Therefore:
m = moles / volume
m = 0.373/ 0.0139
=> 26.83 molal
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Answer: The enthalpy of reaction is, -206.18 kJ
Explanation:-
According to Hess’s law of constant heat summation, the heat absorbed or evolved in a given chemical equation is the same whether the process occurs in one step or several steps.
According to this law, the chemical equation can be treated as ordinary algebraic expression and can be added or subtracted to yield the required equation. That means the enthalpy change of the overall reaction is the sum of the enthalpy changes of the intermediate reactions.
The final reaction is
The intermediate balanced chemical reaction will be,
(1)
(2)
(3)
Now adding (2) and (3) and subtracting (1) , we get :
Therefore, the enthalpy of reaction is, -206.18 kJ
It’s the nerves but I’m not 100% sure if I’m correct
Answer:
the process of returning a land area to the condition it was in before humans used the land
Explanation:
Reclamation refers to the process of returning a disturbed ecosystem to its original status prior to the disturbance. Often times, the disturbance regimes that change the conditions of the ecosystem are created by humans.
<em>Reclamation is unlike reforestation in that the latter involves the process of planting trees in order to reestablish forest lands, not necessarily return the land to its previous status.</em>
Reclamations are often done to return lands to the original flora and fauna status before the disturbance regime.