Question

Classify each of the following as an element, a compound, or a mixture:

(a) iron
(b) oxygen
(c) mercury oxide
(d) pancake syrup
(e) carbon dioxide
(f) a substance composed of molecules each of which contains one hydrogen atom and one chlorine atom
(g) baking soda
(h) baking powder

Answer 1

A) an element
B) an element
C) a compound
D) a mixture
E) a compound
F) a compound
G) a compound

Answer 2

Step-by-step explanation:

• An element is defined as a substance which contains same type of atoms.

For example, a small block made up of only copper metal will contain only atoms of copper.

• A compound is defined as a substance in which atoms chemically combine together in a fixed ratio by mass.

For example, HgO is a compound.

• A mixture is defined as a substance in which two or more components are physically combined but none of the components are chemically combined to each other.

For example, a pan cake syrup is a mixture.

Components of a mixture can be separated by physical means.

Thus, we classify each of the given species as follows.

• iron - element

• oxygen - element

• mercury oxide - compound

• pancake syrup - mixture

• carbon dioxide - compound

• a substance composed of molecules each of which contains one hydrogen atom and one chlorine atom - compound

• baking soda - compound

• baking powder - compound