Answer:
230
Explanation:
Given equilibrium conditions, if a system is at equilibrium, this means the rate of a forward reaction becomes equal to the rate of a reverse reaction and the concentrations of each species become constant (stop to change).
This is defined by the equilibrium constant which defines the concentrations at equilibrium. For the given reaction, the equilibrium constant can be described as the ratio between the concentrations of products (raised to the power of their coefficients) and the concentrations of reactants (raised to the power of their coefficients):
![K_{eq}=\frac{[N_2][H_2]^3}{[NH_3]^2}](https://tex.z-dn.net/?f=K_%7Beq%7D%3D%5Cfrac%7B%5BN_2%5D%5BH_2%5D%5E3%7D%7B%5BNH_3%5D%5E2%7D)
Q, on the other hand, is a reaction quotient. It is used only to determine where the equilibrium will shift when the system is actually not at equilibrium. The expression or Q is exactly same, but concentrations used would be non-equilibrium concentrations. There are three cases:
: in this case, equilibrium shifts towards the formation of products;
: the system is at equilibrium;
: equilibrium shifts towards the formation of reactants.
Looking at the context of our problem, since this system is at equilibrium, then Q = K = 230.
Answer:
One of the errors for low percentage of magnesium could be because not all the magnesium may have reacted.
Explanation:
During the heating process, if the magnesium have not reacted completely, it can lead to low percentage of magnesium in the oxide formed. The product may still look a bit greyish rather than whitish after the heating process.
Answer:
Four bonds
Explanation:
A carbon atom completes its octet (eight electrons in the outermost shell) only when it shares its valence electrons with other atoms. Hence, a carbon atom forms four covalent bonds by sharing valence electrons with other atoms. This is known as tetravalency of carbon established by August Kekule.
Whether carbon is in a straight chain,branched chain or cyclic structure, it always maintains its tetra valency, that it, it always forms four bonds at a time.
