Grams to Moles Calculator

Convert Mass to Moles Instantly

Easily convert grams to moles for any chemical compound. Enter the mass in grams and the molar mass to calculate the number of moles. Perfect for chemistry students, teachers, and professionals.

Examples

See how to convert grams to moles for real compounds.

Water (H2O)

Grams to Moles

Convert 36 grams of water to moles.

Mass (g): 36.0 g

Molar Mass (g/mol): 18.0 g/mol

Compound: H2O

Glucose (C6H12O6)

Grams to Moles

Convert 90 grams of glucose to moles.

Mass (g): 90.0 g

Molar Mass (g/mol): 180.16 g/mol

Compound: C6H12O6

Sodium Chloride (NaCl)

Grams to Moles

Convert 58.44 grams of sodium chloride to moles.

Mass (g): 58.44 g

Molar Mass (g/mol): 58.44 g/mol

Compound: NaCl

Ethanol (C2H5OH)

Grams to Moles

Convert 46 grams of ethanol to moles.

Mass (g): 46.0 g

Molar Mass (g/mol): 46.07 g/mol

Compound: C2H5OH

Other Titles
Understanding Grams to Moles: A Comprehensive Guide
Master the conversion from grams to moles and its importance in chemistry.

What is Grams to Moles Conversion?

  • Definition and Importance
  • Relation to Stoichiometry
  • Everyday Chemistry Applications
Grams to moles conversion is a fundamental calculation in chemistry that allows you to determine the amount of substance present in a given mass. It is essential for stoichiometry, reaction planning, and laboratory work.
Why Convert Grams to Moles?
Moles provide a bridge between the mass of a substance and the number of particles (atoms, molecules, ions) it contains. This is crucial for understanding chemical reactions and proportions.

Real-World Examples

  • 36g of H2O is 2 moles.
  • 90g of glucose is 0.5 moles.

Step-by-Step Guide to Using the Grams to Moles Calculator

  • Input Requirements
  • Calculation Process
  • Interpreting Results
To use the calculator, enter the mass in grams and the molar mass of the compound. Optionally, provide the compound name or formula for clarity.
Calculation Formula
Moles = Mass (g) / Molar Mass (g/mol)

Calculation Examples

  • Mass: 36g, Molar Mass: 18g/mol → Moles = 2
  • Mass: 90g, Molar Mass: 180g/mol → Moles = 0.5

Real-World Applications of Grams to Moles Conversion

  • Laboratory Experiments
  • Industrial Chemistry
  • Pharmaceuticals
Chemists use grams to moles conversion in labs to prepare solutions, measure reactants, and analyze products. It is also vital in industrial and pharmaceutical processes for scaling reactions and ensuring accuracy.
Chemistry in Practice
Accurate conversions help prevent waste, save costs, and ensure safety in chemical processes.

Industrial Examples

  • Preparing 1M NaCl solution requires converting grams to moles.
  • Drug formulation calculations use grams to moles conversion.

Common Misconceptions and Correct Methods

  • Confusing Molar Mass and Mass
  • Unit Consistency
  • Significant Figures
A common mistake is to confuse the mass of a sample with its molar mass. Always ensure units are correct and use significant figures appropriately for accurate results.
Avoiding Calculation Errors
Double-check your inputs and units. Use the correct molar mass for the compound and ensure mass is in grams.

Misconception Examples

  • Using atomic mass instead of molar mass gives wrong results.
  • Mixing grams and kilograms leads to errors.

Mathematical Derivation and Examples

  • Formula Derivation
  • Worked Examples
  • Advanced Tips
The formula for converting grams to moles is derived from the definition of the mole and Avogadro's number. It is a simple division but requires careful attention to units and significant digits.
Sample Calculation
For 36g of H2O (molar mass 18g/mol): Moles = 36 / 18 = 2 mol.

Mathematical Examples

  • 58.44g NaCl / 58.44g/mol = 1 mol
  • 46g C2H5OH / 46.07g/mol ≈ 1 mol