Answer: Activation energy
Explanation:
In a chemical reaction, the reactants contains particles which must collide in order for a reaction to occur. The rate of reaction depends on the frequency of effective collision between the reacting particles. Effective collision are those that result in reactions, which when they occur the colliding particles become activated with increased kinetic energy.
This energy must exceed a particular energy barrier for a particular reaction if the reaction must take place. This energy barrier that must be overcome before a reaction takes place is known as the ACTIVATION ENERGY.
To explain further, when two particles or molecules A and B come in contact with each other, for a reaction to take place, they must collide with a sufficient force to break the bond that exists between them. The minimum combined kinetic energy these reactant particles must possess in order for their collision to result in a reaction is called the activation energy.
Hello Mlbozer,
Hope your having a great day! Gasses are known for having molecules that 'run' in a way. They all are Spread Out, and bounce off each other. Its a big mess, and is more 'spread out' than even liquid, in fact its the most open form of the three! So your answer is false!
Thank you,
Darian D.
Answer: Salt and Water
Explanation:
An Arrhenius acid (HCl) can best be defined as any substance that when added to water increases the concentration of H+ ions.
While an Arrhenius base (KOH) is any substance that when added to water increases the concentration of OH- ions.
When an Arrhenius acid such as HCl reacts with an Arrhenius base such as KOH, the end products will be salt and water, in a process called Neutralization Reaction.
HCl (aq) + KOH (aq) -------> KCl (aq) + H2O (l)
Answer:
The correct answer is option 4.
Answer:
This is a precipitation reaction in which Ni(OH)₂ precipitates.
8.68%
Explanation:
Let's consider the following reaction.
Ni²⁺(aq) + 2 NaOH(aq) ⇄ Ni(OH)₂(s) + 2 Na⁺(aq)
This is a precipitation reaction in which Ni(OH)₂ precipitates.
We can establish the following relations:
- The molar mass of Ni(OH)₂ is 92.71 g/mol.
- 1 mole of Ni(OH)₂ is produced per 1 mole of Ni²⁺.
- The molar mass of Ni²⁺ is 58.69 g/mol.
When 343 mg (0.343 g) of Ni(OH)₂ are collected, the mass of Ni²⁺ that reacted is:
![0.343gNi(OH)_{2}.\frac{1molNi(OH)_{2}}{92.71gNi(OH)_{2}} .\frac{1molNi^{2+} }{1molNi(OH)_{2}} . \frac{58.69gNi^{2+}}{1molNi^{2+}} =0.217gNi^{2+}](https://tex.z-dn.net/?f=0.343gNi%28OH%29_%7B2%7D.%5Cfrac%7B1molNi%28OH%29_%7B2%7D%7D%7B92.71gNi%28OH%29_%7B2%7D%7D%20.%5Cfrac%7B1molNi%5E%7B2%2B%7D%20%7D%7B1molNi%28OH%29_%7B2%7D%7D%20.%20%5Cfrac%7B58.69gNi%5E%7B2%2B%7D%7D%7B1molNi%5E%7B2%2B%7D%7D%20%3D0.217gNi%5E%7B2%2B%7D)
The mass percent of nickel in the 25.0g-sample is:
![\frac{0.217g}{2.50g}.100\%=8.68\%](https://tex.z-dn.net/?f=%5Cfrac%7B0.217g%7D%7B2.50g%7D.100%5C%25%3D8.68%5C%25)