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 constituent elements and can only be separated by chemical means.
Elements joined together to make something new with different properties.
Example 1
easyDefine a compound and explain how it differs from both an element and a mixture.
Example 2
mediumWater (\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
mediumClassify 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
hardHydrogen 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.