I think the correct answer from the choices listed above is option A. The three components of air are all <span>classified as pure substances since they are not chemically bonded so they can be separated by certain processes and be present as a pure substance. Hope this answers the question.</span>
Answer:
it is a replacement reaction
Answer:
3. The reaction will shift to the left.
Explanation:
Hello,
In this case, since we have a heterogeneous equilibrium, and the given equilibrium constant is given in terms of concentration, the law of mass action takes the following form:

![K=\frac{[HCl]^2}{[CaCl_2]}](https://tex.z-dn.net/?f=K%3D%5Cfrac%7B%5BHCl%5D%5E2%7D%7B%5BCaCl_2%5D%7D)
Clearly, just the hydrochloric acid and the calcium chloride participate in the equilibrium as they are the only aqueous species. Nonetheless, the given concentrations are not defining the equilibrium, therefore, one computes the reaction quotient in order to predict what would the system do to reach equilibrium as shown below.
![Q=\frac{[HCl]^2}{[CaCl_2]}=\frac{ 30.2^2 }{0.652 }=1398.8](https://tex.z-dn.net/?f=Q%3D%5Cfrac%7B%5BHCl%5D%5E2%7D%7B%5BCaCl_2%5D%7D%3D%5Cfrac%7B%2030.2%5E2%20%7D%7B0.652%20%7D%3D1398.8)
Thus, since Q>K, the reaction will shift leftwards, favoring the formation of reactants, therefore, answer is 3. The reaction will shift to the left.
Best regards.
Answer:
Physical characteristics may be assessed without altering the chemical identity of a material.
Explanation: