Practice Compound in Chemistry

Use these practice problems to test your method after reviewing the concept explanation and worked examples.

Quick Recap

A pure substance composed of two or more different elements chemically bonded together in a fixed ratio, whose properties differ entirely from those of its.

Elements joined together to make something new with different properties.

Example 1

easy
Define a compound and explain how it differs from both an element and a mixture.

Example 2

medium
Water (\text{H}_2\text{O}) is a compound that can be decomposed by electrolysis. Write the equation for this decomposition and explain why the products have different properties from water.

Example 3

medium
Classify each as an element, compound, or mixture: (a) table salt (NaCl), (b) oxygen gas (\text{O}_2), (c) bronze (Cu/Sn alloy), (d) carbon dioxide (\text{CO}_2).

Example 4

hard
Hydrogen peroxide (\text{H}_2\text{O}_2) and water (\text{H}_2\text{O}) both contain hydrogen and oxygen. Explain why they are different compounds with different properties, even though they contain the same elements.
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