Endothermic because the separation of the ions dictate the overall reaction
Water and salt, since the salt has dissolved into the water, assumingly, and sand isn't dissolvable so it can't pass through. If the water were to dry up, then you'd get the salt back, then it won't be able to go through the filter
Lewis structure :
•• •• ••
:Cl• •N • •Cl:
•• • ••
•
:Cl:
••
The dots around the respective atoms represent the number of valence electrons each of the corresponding atoms have. Since nitrogen is more electronegative it is placed within the middle, it can also form the 3 covalent bonds, unlike chlorine which can only form 1 and thus is in the middle of the diagram. This structure has gained stability in that all of the atoms have 8 electrons in its outermost shell, if you were to count the shared electrons for each atom.
I a chemical reaction, we have the reactants in the left part,followed by an arrow and then the products.
So, the reactants are the two that are in the left part of the equation:
Sodium hydroxide and Hydrochloric acid
Answer: A. 219K
Explanation:
Using the Combined Gas Law; P1 V1/T1 = P2V2/T2
Where P1 = 0.92 atm, P2 = 1.00 atm
V1 =4.0 L, V2 = 5.0 L
T1 = ?, T2 = 25 celcius = 298K
We therefore make T1 the subject of the formular;
T1 = P1 . V1 .T2 / P2. V2
= 0.92atm x 4.0L x 298K / 1.00 atm x 5.0 L
= 1096.64 / 5
= 219.328 approx 219K
