Question

Be sure to answer all parts. Classify each of the following as a compound, a homogeneous mixture, or a heterogeneous mixture:

(a) chunk of brass
A. homogeneous mixture
B. heterogeneous mixture
C. compound
(b) gasoline
A. homogeneous mixture
B. heterogeneous mixture
C. compound
(c) sample of table salt
A. homogeneous mixture
B. compound
C. heterogeneous mixture

Answer 1

A chunk of brass is a homogeneous mixture, gasoline is also a homogeneous mixture, and a sample of table salt is a compound.

Step-by-step explanation:

To classify each substance as a compound, a homogeneous mixture, or a heterogeneous mixture, we need to understand the definition of each:

• A compound is a substance made from two or more different elements that are chemically bonded together in a fixed ratio.
• A homogeneous mixture (solution) is a mixture that has a uniform composition throughout and does not separate into different phases.
• A heterogeneous mixture is a mixture where the components can be visibly distinguished and may separate into different phases.

Using these definitions:

1. Chunk of brass - This is a homogeneous mixture because it consists of copper and zinc mixed uniformly at the microscopic level.
2. Gasoline - This is also a homogeneous mixture because it is a blend of hydrocarbons and additives that are uniformly mixed.
3. Sample of table salt (sodium chloride, NaCl) - This is a compound because it is made up of sodium and chlorine atoms chemically bonded in a 1:1 ratio.