Quick Links
Quick Links
Exams
Test Series
Previous Year Papers
JEE Main Previous Year Question Paper JEE Advanced Previous Year Papers NEET Previous Year Question Paper CUET Previous Year Papers COMEDK UGET Previous Year Papers UP Polytechnic Previous Year Papers AP POLYCET Previous Year Papers TS POLYCET Previous Year Papers KEAM Previous Year Papers MHT CET Previous Year Papers WB JEE Previous Year Papers GUJCET Previous Year Papers ICAR AIEEA Previous Year Papers CUET PG Previous Year Papers JCECE Previous Year Papers Karnataka PGCET Previous Year Papers NEST Previous Year Papers KCET Previous Year Papers LPUNEST Previous Year Papers AMUEEE Previous Year Papers IISER IAT Previous Year Papers Bihar Diploma DECE-LE Previous Year Papers NPAT Previous Year Papers JMI Entrance Exam Previous Year Papers PGDBA Exam Previous Year Papers AP ECET Previous Year Papers PU CET Previous Year Papers GPAT Previous Year Papers CEED Previous Year Papers AIAPGET Previous Year Papers JKCET Previous Year Papers HPCET Previous Year Papers CG PAT Previous Year Papers SRMJEEE Previous Year Papers BCECE Previous Year Papers AGRICET Previous Year Papers TS PGECET Previous Year Papers MP PAT Previous Year Papers IIT JAM Previous Year Papers CMC Vellore Previous Year Papers ACET Previous Year Papers TS EAMCET Previous Year Papers NATA Previous Year Papers AIIMS MBBS Previous Year Papers BITSAT Previous Year Papers JEXPO Previous Year Papers HITSEEE Previous Year Papers AP EAPCET Previous Year Papers UCEED Previous Year Papers CG PET Previous Year Papers OUAT Previous Year Papers VITEEE Previous Year Papers
Syllabus
JEE Main Syllabus JEE Advanced Syllabus NEET Syllabus CUET Syllabus COMEDK UGET Syllabus UP Polytechnic JEECUP Syllabus AP POLYCET Syllabus TS POLYCET Syllabus KEAM Syllabus MHT CET Syllabus WB JEE Syllabus OJEE Syllabus ICAR AIEEA Syllabus CUET PG Syllabus NID Syllabus JCECE Syllabus Karnataka PGCET Syllabus NEST Syllabus KCET Syllabus UPESEAT EXAM Syllabus LPUNEST Syllabus PUBDET Syllabus AMUEEE Syllabus IISER IAT Syllabus NPAT Syllabus JIPMER Syllabus JMI Entrance Exam Syllabus AAU VET Syllabus PGDBA Exam Syllabus AP ECET Syllabus GCET Syllabus CEPT Syllabus PU CET Syllabus GPAT Syllabus CEED Syllabus AIAPGET Syllabus JKCET Syllabus HPCET Syllabus CG PAT Syllabus BCECE Syllabus AGRICET Syllabus TS PGECET Syllabus BEEE Syllabus MP PAT Syllabus MCAER PG CET Syllabus VITMEE Syllabus IIT JAM Syllabus CMC Vellore Syllabus AIMA UGAT Syllabus AIEED Syllabus ACET Syllabus TS EAMCET Syllabus PGIMER Exam Syllabus NATA Syllabus AFMC Syllabus AIIMS MBBS Syllabus BITSAT Syllabus BVP CET Syllabus JEXPO Syllabus HITSEEE Syllabus AP EAPCET Syllabus GITAM GAT Syllabus UPCATET Syllabus UCEED Syllabus CG PET Syllabus OUAT Syllabus IEMJEE Syllabus VITEEE Syllabus SEED Syllabus MU OET Syllabus
Books
Cut Off
JEE Main Cut Off JEE Advanced Cut Off NEET Cut Off CUET Cut Off COMEDK UGET Cut Off UP Polytechnic JEECUP Cut Off AP POLYCET Cut Off TNEA Cut Off TS POLYCET Cut Off KEAM Cut Off MHT CET Cut Off WB JEE Cut Off ICAR AIEEA Cut Off CUET PG Cut Off NID Cut Off JCECE Cut Off Karnataka PGCET Cut Off NEST Cut Off KCET Cut Off UPESEAT EXAM Cut Off AMUEEE Cut Off IISER IAT Cut Off Bihar Diploma DECE-LE Cut Off JIPMER Cut Off JMI Entrance Exam Cut Off PGDBA Exam Cut Off AP ECET Cut Off GCET Cut Off CEPT Cut Off PU CET Cut Off CEED Cut Off AIAPGET Cut Off JKCET Cut Off HPCET Cut Off CG PAT Cut Off SRMJEEE Cut Off TS PGECET Cut Off BEEE Cut Off MP PAT Cut Off VITMEE Cut Off IIT JAM Cut Off CMC Vellore Cut Off ACET Cut Off TS EAMCET Cut Off PGIMER Exam Cut Off NATA Cut Off AFMC Cut Off AIIMS MBBS Cut Off BITSAT Cut Off BVP CET Cut Off JEXPO Cut Off HITSEEE Cut Off AP EAPCET Cut Off GITAM GAT Cut Off UCEED Cut Off CG PET Cut Off OUAT Cut Off VITEEE Cut Off MU OET Cut Off
Latest Updates
Eligibility
JEE Main Eligibility JEE Advanced Eligibility NEET Eligibility CUET Eligibility COMEDK UGET Eligibility UP Polytechnic JEECUP Eligibility TNEA Eligibility TS POLYCET Eligibility KEAM Eligibility MHT CET Eligibility WB JEE Eligibility OJEE Eligibility ICAR AIEEA Eligibility CUET PG Eligibility NID Eligibility JCECE Eligibility Karnataka PGCET Eligibility NEST Eligibility KCET Eligibility LPUNEST Eligibility PUBDET Eligibility AMUEEE Eligibility IISER IAT Eligibility Bihar Diploma DECE-LE Eligibility NPAT Eligibility JIPMER Eligibility JMI Entrance Exam Eligibility AAU VET Eligibility PGDBA Exam Eligibility AP ECET Eligibility GCET Eligibility CEPT Eligibility PU CET Eligibility GPAT Eligibility CEED Eligibility AIAPGET Eligibility JKCET Eligibility HPCET Eligibility CG PAT Eligibility SRMJEEE Eligibility BCECE Eligibility AGRICET Eligibility TS PGECET Eligibility MP PAT Eligibility MCAER PG CET Eligibility VITMEE Eligibility IIT JAM Eligibility CMC Vellore Eligibility AIMA UGAT Eligibility AIEED Eligibility ACET Eligibility PGIMER Exam Eligibility CENTAC Eligibility NATA Eligibility AFMC Eligibility AIIMS MBBS Eligibility BITSAT Eligibility JEXPO Eligibility HITSEEE Eligibility AP EAPCET Eligibility GITAM GAT Eligibility UPCATET Eligibility UCEED Eligibility CG PET Eligibility OUAT Eligibility IEMJEE Eligibility SEED Eligibility MU OET Eligibility
Home / Chemistry / Mole Ratio: Definition, Determination, Unit, and Problems - Testbook

Mole Ratio: Definition, Determination, Unit, and Problems - Testbook

Last Updated on Feb 17, 2025
Download As PDF
IMPORTANT LINKS
Some Basic Concepts of Chemistry
Difference Between Molar Mass And Molecular Mass Difference Between Atomic Mass And Atomic Weight Materials Difference Between Extensive And Intensive Properties Difference Between Mixture And Solution Matter in Our Surrounding Atoms and Molecules Difference Between Atom And Molecule "Elements Difference Between Pure Substance and Mixture Difference Between Homogenous and Heterogeneous Mixtures How to find Atomic Mass Mole Concept Atomic Mass and Molecular Mass Laws of Chemical Combination Ions Law of Constant Proportion Chemical Reaction Uncertainty In Measurement Molality Normality Formula Chemical Equations Limiting Reagent Analytical Chemistry Volumetric Analysis Elements and Compounds Difference Between Molecule and Compound with Examples Difference Between Physical Change and Chemical Change Elements Substance Molecules What is Chemical Equation What is Brisk Effervescence Physical Change Balancing of Chemical Equations Chemical Change Chemical Composition Chemical and Physical Change Chemistry Laws Difference Between Compound And Mixture Difference Between Element And Compound Difference Between Mass And Matter Difference Between Physical And Chemical Properties Difference Between Molecule And Compound Difference Between Physical And Chemical Change Examples of Chemical Change Is Matter around us Pure Law of Constant Proportions Characteristics of Particles of Matter Mixtures Mole Ratio Object around us Particle Theory Of Matter Physical Nature of Matter Physical Change and Chemical Change Physical Properties Pure Substances Significant Figures Groups of Materials Stoichiometric Calculations Homogenous Mixtures Writing Chemical Formulae Chemical Equation Empirical Molecular Formula Intensive and Extensive Properties of Matter Mass Molar Mass Nature and Characterisitics of Matter Examples of Chemical and Physical Changes Physical Change Stoichiometry Daltons Atomic Theory
Structure of Atom Classification of Elements and Periodicity in Properties Chemical Bonding and Molecular Structure Thermodynamics Equilibrium Redox Reactions Organic Chemistry Hydrocarbons Solutions Electrochemistry Chemical Kinetics D and F Block Elements Coordination Compounds Haloalkanes and Haloarenes Alcohols Phenols and Ethers Aldehydes Ketones and Carboxylic Acids Amines Biomolecules The Solid State Surface Chemistry P Block Elements Polymers Chemistry in Everyday Life States of Matter Hydrogen S Block Elements Environmental Chemistry
Applications Of Electrophoresis What Are Minerals How To Calculate Oxidation Number Sorting Materials Into Groups Neodymium Manganese Dioxide Inorganic Chemistry Bromination Potassium Bromate Difference Between Evaporation And Boiling Uses of Sodium Hydroxide Uses Of Colorimeter Resorcinol Positron Partition Chromatography Metal Magnesium Nitrate Gaseous State Epoxide Energy Level Diagram

Defining the Mole Ratio

The mole ratio is the ratio of the quantities in moles of any two compounds involved in a chemical reaction that is balanced. The balanced chemical equation provides the ratios of the molecules necessary to complete the reaction. It's important to note that mole ratios cannot be calculated for an unbalanced equation. Mole ratios serve as conversion factors between products and reactants in many chemistry problems.

Get 6 Months SuperCoaching @ just

₹1999 ₹499

Your Total Savings ₹1500
Purchase Now
Want to know more about this pass ?
Explore SuperCoaching

Table of contents

Defining a Mole

In the realm of chemistry, a mole is a fundamental unit used to measure the amount of a substance, often referred to as the chemical amount.

A mole is defined as the amount of a substance that contains exactly 6.022 x 10 23 ‘elementary entities’ of the given substance.

Each mole contains 6.023 x 10 23 units. These units can be atoms, molecules, ions, electrons, or any other entities.

Examples include:

  • 1 mole of helium atoms = 6.023 x 10 23 helium atoms
  • 1 mole of oxygen molecules = 6.023 x 10 23 oxygen molecules.
  • 1 mole of electrons = 6.023 x 10 23 electrons.
  • 1 mole of potassium ions = 6.023 x 10 23 potassium ions.

How much does one mole weigh?

The mass of one mole atom of any element is exactly equal to the atomic mass in grams of that element.

Similarly, the mass of 1 mole molecule of any substance is equal to its molecular mass in grams or gram molecular mass .

Examples:

  • Mass of 1 mole helium atom = 4 g
  • Mass of 1 mole of oxygen molecule = 32 g
  • Mass of 1 mole of carbon atom = 12 g
  • Mass of 1 mole of water (H 2 O) molecule = 18 g

∴ Mole of the substance = (Mass of the substance in gm / Gram molecular mass of that substance)

For more information, check out this article on the Mole concept

Test Series
256.8k Students
Current Affairs (CA) 2025 Mega Pack for SSC/Railways/State Exam Mock Test
431 TOTAL TESTS | 4 Free Tests
  • 168 Topic Specific
  • 52 Weekly Revision
  • 24 Monthly Digest
  • 12 Need-to-Know NEWS
  • 96 State Specific
  • 10 Previous Year Questions
  • 17 Revision 2024
  • 52 Advanced Current Affairs
Get Started

Determining Mole Ratio in Stoichiometric Reactions

Stoichiometry is a crucial concept in chemistry that allows us to use balanced chemical equations to calculate the amounts of reactants and products. In this process, we use ratios from the balanced equation. All reactions are dependent on one main factor, the amount of substance present. We cannot calculate the mole ratio for an unbalanced equation.

1. Consider a balanced chemical equation

H 2 + ½O 2 → H 2 O

  • The coefficients of H 2 =1
  • The coefficients of O 2 = ½
  • The coefficients of H 2 O = 1

These coefficients provide the molecular information for the chemical equation.

In this chemical equation 1 mole of hydrogen (H 2 ) reacts with ½ mole of oxygen (O 2 ) to produce 1 mole of water (H 2 O) .

To determine the mole ratio of any two components of the equation, compare the coefficients of each component in the equation.

  • Mole ratio between H 2 and O 2 = ( 1 mole of H 2 / ½ mole of O 2 ) = 2:1
  • Mole ratio between H 2 and H 2 O = ( 1 mole of H 2 / 1 mole of H 2 O) = 1:1
  • Mole ratio between O 2 and H 2 O = ( ½ mole of O 2 / 1 mole of H 2 O) = 1:2

Unit of Mole Ratio

The mole ratio is a dimensionless unit . This is because it is expressed in mole:mole, and the units of moles cancel each other out.

Practicing Mole Ratio Problems

1. Given the reaction 2Al + 3Br2 → 2AlBr3, how many moles of AlBr3 are produced from 1.5 moles of Al?

2. How many moles of water are produced when 2.5 moles of oxygen react with an excess of hydrogen in the reaction 2H2 + O2 → 2H2O?

More Articles for Chemistry

Frequently Asked Questions

A mole ratio is the ratio between the amounts in moles of any two compounds involved in a balanced chemical reaction.

In the balanced chemical equation of ammonia is N2 + 3H2 → 2NH3, the mole ratio between N2 and H2 is 1:3.

In the balanced chemical equation of zinc to sulfuric acid is Zn + H2SO4 → ZnSO4 + H2, the mole ratio between Zn and H2SO4 is = 1:1.

Mole ratios allow comparison of the amounts of any two materials in a balanced equation. Calculations can be made to predict how much product can be obtained from a given number of moles of reactant.

Stoichiometry is an important concept in chemistry that helps us use balanced chemical equations to calculate amounts of reactants and products. Here, we can use mole ratios from the balanced equation.
Report An Error
Exams Tests Super Practice