Mole Ratio Calculator

The mole ratio calculator calculates the ratio of moles between reactants and products based on the balanced chemical equation of the reaction.

What Is Mole To Mole Ratio?

“Mole ratio is a conversion factor that proportionally relates the amounts of chemical substances involved in a reaction SI Unit: Mole

Mole Ratio Formula:

Mole Ratio = Moles of Reactants / Moles of Products

The values come from the coefficients of the balanced chemical equation.

Example:

Consider the following balanced chemical equation:

\(N_2 (g) + 3 H_2 (g) \rightarrow 2 NH_3 (g)\)

This reaction has 6 mole ratios, which can be expressed as:

\(\begin{array}{ccc} \dfrac{3 \, \text{mol } H_2}{1 \, \text{mol } N_2} & \text{or} & \dfrac{1 \, \text{mol } N_2}{3 \, \text{mol } H_2} \\ \dfrac{1 \, \text{mol } N_2}{2 \, \text{mol } NH_3} & \text{or} & \dfrac{2 \, \text{mol } NH_3}{1 \, \text{mol } N_2} \\ \dfrac{3 \, \text{mol } H_2}{2 \, \text{mol } NH_3} & \text{or} & \dfrac{2 \, \text{mol } NH_3}{3 \, \text{mol } H_2} \\ \end{array}\)

Related:

If your reaction is unbalanced, you can use the Balancing Chemical Equations Calculator to balance it.

How To Find Mole Ratio?

Calculating mole ratios is useful for estimating the theoretical yield of a chemical reaction. Follow these steps:

• Balance the chemical equation.
• Identify the coefficients of reactants and products.
• Determine the ratio of coefficients to get the mole ratio.

Solved Example (Mole Ratio):

Consider the reaction:

\(N_2 (g) + 3 H_2 (g) \rightarrow 2 NH_3 (g)\)

If 5.83 moles of hydrogen reacts with an excess of nitrogen, how many moles of ammonia will be produced?

Solution:

Step 1: Write the Given Values

Moles of \(H_2\) = 5.83

Step 2: Write the Unknown Quantity

Moles of \(NH_3\) = ?

Step 3: Identify the Problem

We need to convert moles of \(H_2\) to moles of \(NH_3\). Nitrogen is in excess and does not limit the reaction. Use the mole ratio from the balanced equation:

Step 4: Solve

\[ 5.83 \, \text{mol } H_2 \times \frac{2 \, \text{mol } NH_3}{3 \, \text{mol } H_2} = 3.88 \, \text{mol } NH_3 \]

Therefore, 3.88 moles of ammonia will be produced.

Mole Ratio Calculator:

Use our Mole Ratio / Stoichiometry Calculator to instantly find the stoichiometric relationships between reactants and products:

• Step 1: Enter the stoichiometric coefficients of reactants and products.
• Step 2: Click the Calculate button.
• Step 3: View the mole ratio for each substance in the reaction.

What Is Mole Ratio in Water?

Consider the reaction:

\(2 H_2 + O_2 \rightarrow 2 H_2O\)

Mole Ratio = 2:1:2 (H₂ : O₂ : H₂O)

Mole Ratio from Molecular Weight:

• Calculate the moles of each substance using its mass and molecular weight.
• Use the formula: Mole Ratio = Moles of Reactant / Moles of Product.
• Compare ratios to determine limiting reagents, product yield, or other stoichiometric calculations.