Which of the following general equations describes all decomposition reactions?
decompo
single
double
A
2N2O5 → O2 + 4NO2 Is what type of chemical reaction?
Combustion
Synthesis
Decomposition
None of the above.
not sure
Which of the following is a decomposition reaction?
2 KClO3 → 2 KCl + 3 O2
Zn + 2 HCl → ZnCl2 + H2
Fe + S → FeS
All of the above are examples of decomposition.
D
You need to do better than this. I can't tell the difference between questions and answers. In fact, I'm not sure of the question. With regard to the last one, the KClO3 is the decomposition. The Zn and HCl is a single replacement and the Fe and S rxn is synthesis.
To determine which general equation describes all decomposition reactions, we need to understand decomposition reactions. A decomposition reaction is a chemical reaction in which a compound breaks down into simpler substances. In other words, one reactant molecule decomposes into two or more product molecules.
Now, let's look at the given options:
A. 'decompo' is not a valid option. It does not describe a general equation for decomposition reactions.
B. 'single' is not a valid option either. It does not describe the concept of decomposition reactions.
C. 'double' is also not a valid option. It is unrelated to decomposition reactions.
Therefore, none of the given options correctly describe the general equation for decomposition reactions.
Moving on to the second question:
The chemical equation 2N2O5 → O2 + 4NO2 represents the decomposition of dinitrogen pentoxide into oxygen gas and nitrogen dioxide. To determine the type of chemical reaction this represents, we can analyze the equation.
A combustion reaction involves a substance combining with oxygen to produce heat and light. However, in the given equation, combustion is not involved.
A synthesis reaction occurs when two or more substances combine to form a more complex product. Again, this does not occur in the given equation.
On the other hand, a decomposition reaction occurs when a compound breaks down into simpler substances. This fits the given equation, where the dinitrogen pentoxide breaks down into oxygen gas and nitrogen dioxide.
Therefore, the correct answer to the second question is:
2N2O5 → O2 + 4NO2 represents a decomposition reaction.
Moving on to the third question:
Among the given options, the equation 2 KClO3 → 2 KCl + 3 O2 is a decomposition reaction because a compound, potassium chlorate (KClO3), breaks down into simpler substances, potassium chloride (KCl), and oxygen gas (O2).
The equations Zn + 2 HCl → ZnCl2 + H2 and Fe + S → FeS do not represent decomposition reactions. The first equation represents a single replacement reaction, where zinc (Zn) displaces hydrogen (H) from hydrochloric acid (HCl) to form zinc chloride (ZnCl2) and hydrogen gas (H2). The second equation represents a synthesis reaction, where iron (Fe) combines with sulfur (S) to form iron sulfide (FeS).
Therefore, the correct answer to the third question is:
2 KClO3 → 2 KCl + 3 O2 represents a decomposition reaction.