Mass Ratios, Percent Composition & Empirical Formulas Quiz

This online quiz is intended to give you extra practice in determining mass ratios, percent compositions and empirical formulas of a variety of chemical compounds. This quiz aligns with AP® Chemistry Learning Objective 1.3 Elemental Composition of Pure Substances.

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Number of problems:	1  5  10  25
Question type(s):	Mass ratios within formulas  Percent composition from formulas  Percent composition from masses  Empirical formulas from percentages  Empirical formulas from masses
Chemical compound types:	Acids  Ionic compounds with monatomic ions (easier)  Ionic compounds with polyatomic ions (more difficult)  Hydrates  Molecular compounds  Common organic compounds
Chemical names or formulas:	Chemical formulas only (easier)  Chemical names only (more challenging)  Mix & match
Number of elements in compounds (does not apply to hydrates):	2 elements  3 elements  4 elements
Display problems as:	List of given and wanted values (easier)  Word problems (more challenging)
Question format:	Fill-in-the-blank  Multiple choice
Show periodic table:	Display pop-out periodic table on quiz
Show calculator:	Display pop-out calculator on quiz
Show solutions:	Display solution setups after quiz has been taken
Display quiz as:	Interactive web page (typical)  Printable web page (for worksheets)      •  Display quiz instructions (if applicable)      •  Add "Name:" line at top      •  Add custom title at top:   Presentation (full screen for class)
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