Answer:
The correct statements are (II) and (III).
Explanation:
Any change in the equilibrium is studied on the basis of Le-Chatelier's principle.
This principle states that if there is any change in the variables of the reaction, the equilibrium will shift in the direction to minimize the effect.
For the given equation:
This is a type of exothermic reaction because heat is released in the reaction.
On increasing the temperature
If the temperature is increased, so according to the Le-Chatlier's principle , the equilibrium will shift in the direction where decrease in temperature occurs. As, this is an exothermic reaction, forward reaction will increase the temperature. Hence, the equilibrium will shift in the left direction.
And by moving to left side amount of ammonia will decrease accompanied by the change in the value of an equilibrium constant.
The answer would be B.
Why?
Because compounds are a combination of two or more elements, while a mixture can be virtually anything. We cannot simply mix hydroxide and sodium together and claim it as a physical bond, it doesn't make sense since they react with each other in some way. However, mixtures are typically physical, since a chemical change most likely would not occur if we mixed popcorn and pretzels together in a bowl to make chex mix.
I hope I could help and I hope this made sense!
Answer:
82
Explanation:
Atomic number of the isotope is 26 and it has a mass number of 56
X = ⁵⁶₂₆Fe
The three main subatomic particles in an atom are
1. Proton
2. Neutron
3. Electron
The number of protons and electrons are usually equal so as to maintain electrical neutrality in the atom except in cases where it's a charged particles hence the number of proton and electrons will differ.
In this case, the atomic number is 26 and atomic numbers are also known as the number of protons (positively charged particle).
Proton = 26
Electrons = 26 (since it's a naturally charged particle)
Neutron = ?
Mass number = sum of proton and neutrons. This variation in the mass number usually leads to isotopes of an atom and this is mainly caused by variation in the number of neutrons eg. Carbon-12 and Carbon-13 have different number of neutrons.
Mass number = protons + neutrons
Neutrons = mass number - protons
Neutrons = 56 - 26
Neutrons = 30
Subatomic particles present are
Protons = 26
Electrons = 26
Neutrons = 30
Total number = (26 + 26 + 30) = 82
The total number of subatomic particles is 82.
The two weak conductors energy double up to make a good conductor!
Answer : The activation energy for the reaction is, 43.4 KJ
Explanation :
According to the Arrhenius equation,
or,
where,
= rate constant at
= rate constant at =
= activation energy for the reaction = ?
R = gas constant = 8.314 J/mole.K
= initial temperature =
= final temperature =
Now put all the given values in this formula, we get:
Therefore, the activation energy for the reaction is, 43.4 KJ