Question

18 pure copper metal has a very high conductivity. brass, an alloy of copper and zinc, has a much lower conductivity. why are the conductivities different? a. because a chemical reaction has changed the copper into brass b. because the copper is hidden by the zinc in the brass c. because the physical properties of the mixture are similar to its components d. because the physical properties of the mixture are different than its components

Explanation:

In an alloy like brass (copper - zinc), the physical properties of the components blend. The conductivity is affected by the presence of zinc which changes the overall conductivity compared to pure copper. It's not a chemical reaction as no new substances are formed. The properties of the mixture are different from the individual components.

Answer:

D. because the physical properties of the mixture are different than its components