1. What is Molar Ratio?

The molar ratio compares the number of moles of one substance to another in a chemical reaction or mixture. It's a fundamental concept in stoichiometry that helps determine reactant proportions and predict product amounts.

2. How Does the Calculator Work?

The calculator uses the molar ratio formula:

Where:

• \( \text{grams}_1 \) — Mass of first substance in grams
• \( \text{MW}_1 \) — Molecular weight of first substance in g/mol
• \( \text{grams}_2 \) — Mass of second substance in grams
• \( \text{MW}_2 \) — Molecular weight of second substance in g/mol

Explanation: The calculator first converts each mass to moles by dividing by the respective molecular weight, then calculates the ratio between these mole values.

3. Importance of Molar Ratio

Details: Molar ratios are essential for balancing chemical equations, determining limiting reagents, calculating reaction yields, and preparing solutions with specific stoichiometries.

4. Using the Calculator

Tips: Enter masses in grams and molecular weights in g/mol. All values must be positive numbers. For accurate results, use precise measurements and correct molecular weights.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between mass ratio and molar ratio?
A: Mass ratio compares masses directly, while molar ratio compares the number of molecules/atoms (accounting for different molecular weights).

Q2: How do I find molecular weights?
A: Sum atomic masses from the periodic table or use standard references. For compounds, add all constituent atoms' weights.

Q3: Can I use this for solutions?
A: Yes, if you know the mass of solute in a given volume. For molarity-based ratios, different calculations are needed.

Q4: What does a ratio of 2:1 mean?
A: It means there are twice as many molecules of substance 1 as substance 2 in the mixture.

Q5: How precise should my measurements be?
A: Use the highest precision available (typically 4+ significant figures) for accurate stoichiometric calculations.