<u>Answer and explanation:</u>
We know that magnesium and hydrochloric acid are to react with each other so the chemical equation for this reaction will be:
Here in this reaction, the mole ratio of the reactants used is 1:1 that means we need equal amounts of magnesium as well as hydrochloric acid to have a complete reaction.
Therefore, the mass would be same since according to the law of conservation of mass, energy can neither be created nor destroyed but can only be changed.
<u>Solution and Explanation:</u>
[La3+] = 0.1 M
<u>At the equilibrium:
</u>
La(IO3)3 <----> La3+ + 3 IO3-
0.1 +s 3s
Since Ksp is small, s can be ignored as compared to the 0.1
The above shown expression thus becomes:
<u>Answer: 1.4*10^-4 M
</u>
Answer:
The concentration of B(g) decrease.
Explanation:
The equilibrium state for a chemical system is characterized by concentrations or partial pressures of reagents and products that remain unchanged over time. Le Chatelier's Principle states that if a system in equilibrium undergoes a change in conditions, it will move to a new position in order to counteract the effect that disturbed it and restore the state of equilibrium.
One of the conditions that can be modified is concentration. When the concentration of one of the substances in an equilibrium system is changed, the equilibrium varies in such a way that it can compensate for this change. When this concentration increases, the system will shift so that it partially uses the added substance. That is, if a reagent is increased, as happens in this casp when A (g) increases, the system will partially consume it, favoring the direct direction of the reaction. In other words, the balance shifts to the right or to the side of the products.
So, <u><em>the concentration of B(g) decrease.</em></u>
Answer:
The cathode is the electrode where the reduction takes place.
Explanation:
Cell has three components:
an electrolyte and two electrodes which is a cathode and an anode.
Electrolyte is usually solution of the water or other solvents in which the ions are dissolved.
<u>In electrolytic cell:</u>
Negatively charged electrode is the cathode where the process of reduction takes place.
Positively charged electrode is the anode where the process of oxidation takes place.
<u>In galvanic cell:</u>
Positively charged electrode is the cathode where the process of reduction takes place.
Negatively charged electrode is the anode where the process of oxidation takes place.
<u>So, the correct answer is - The cathode is the electrode where the reduction takes place.</u>
In the first law of thermodynamics, it states when heat is converted into energy, where as the total energy in the room could transform into another but can never be created or destroyed. If you release 258J of energy in the room, 258J would also be removed from the food according to the isolating system.
Your answer would be 258J.