Counting Atoms in Chemical Formulas
A Grade 12 chemistry worksheet focusing on counting atoms in various chemical formulas, including those with polyatomic ions and hydrates.
Includes
Standards
Counting Atoms in Chemical Formulas
Name:
Date:
Score:
Carefully read each chemical formula and determine the total number of atoms for each element present. Show your work where indicated.
1. In the compound H₂O, there are hydrogen atoms and oxygen atoms.
2. How many atoms of each element are in C₆H₁₂O₆ (glucose)?
Carbon:
Hydrogen:
Oxygen:
3. Explain how to count atoms in a formula containing parentheses, such as Ca(NO₃)₂. Provide the total count for each element in this compound.
4. What is the total number of oxygen atoms in 3 molecules of sulfuric acid, 3H₂SO₄?
4
7
12
16
5. Consider the compound Copper(II) sulfate pentahydrate, CuSO₄·5H₂O. Determine the total number of atoms for each element in this hydrate.
Show your detailed calculations for each element.
6. The coefficient in front of a chemical formula multiplies the number of all atoms in that formula.
True
False
Related Worksheets
Grade 12 Burette Reading Worksheet
A worksheet for Grade 12 Chemistry students to practice reading and understanding burette measurements.
Balancing Nuclear Reactions Worksheet
Grade 12 Science worksheet focused on balancing nuclear equations, identifying types of decay, and understanding nuclear stability.
Hydrocarbons Worksheet
Grade 12 Chemistry worksheet covering the nomenclature, structure, properties, and reactions of various hydrocarbon classes.
Grade 12 Molecular Structure Worksheet
A Grade 12 Chemistry worksheet focusing on molecular structure, VSEPR theory, hybridization, and intermolecular forces.
Percent Abundance of Isotopes Worksheet
Grade 12 Chemistry worksheet on understanding and calculating percent abundance of isotopes, average atomic mass, and mass spectrometry.
Acid-Base Nomenclature Worksheet
A Grade 12 Chemistry worksheet covering the nomenclature of acids and bases, including common naming conventions and formulas.
Ionic Bonds Worksheet
A Grade 12 Chemistry worksheet exploring the principles of ionic bonding, including formation, properties, and examples.
Ionic Bonds Worksheet
A Grade 12 Chemistry worksheet exploring the principles of ionic bonding, including formation, properties, and examples.