Printable Formula Mass Practice Sheet
This two-page formula mass practice sheet is for chemistry students working on formula mass in atomic mass units. It includes a Name and Date line, then problems with space for answers in two columns. The worksheet uses these atomic masses: H 1.008, C 12.011, N 14.007, O 15.999, Na 22.990, Mg 24.305, S 32.06, Cl 35.45, K 39.098, Ca 40.078, and Cu 63.546. Problems include H2O, CO2, NaCl, (NH4)2SO4, C6H12O6, and KCl.

Free printable · PDF
- 2 pages
- US Letter — choose “Fit to page” for A4
- PDF, 55 KB
Free for personal, family and classroom use.
Use the first page to calculate each formula mass in u. The second page is an answer key with numbered problems, the formula, and the correct mass. It works well for classwork, homework, review, or checking student work after they finish.
Good for
- Classwork on formula mass calculations
- Homework for chemistry practice
- Answer key for quick checking
Tip: Print double-sided to keep the worksheet and answer key together.
4 files · PDF, DOCX, XLSX
Get every sheet: Formula Mass Worksheets
This sheet plus 3 more in one download, with the editable Word and Excel files. Formula mass practice worksheets with worked answers, an empirical formula worksheet, a common and polyatomic ions chart and an atomic mass reference table.
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