1. What is Hydrogen Density Calculator?

Definition: This calculator converts the density of hydrogen gas from kg/m³ to g/mL.

Purpose: It helps scientists, engineers, and students work with hydrogen density in different unit systems.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( \rho \) — Density in grams per milliliter (g/mL)
• \( \rho_{kg/m³} \) — Density in kilograms per cubic meter (kg/m³)

Explanation: Since 1 kg/m³ equals 0.001 g/mL, we divide the kg/m³ value by 1000 to convert to g/mL.

3. Importance of Hydrogen Density

Details: Hydrogen has an extremely low density (~0.0899 kg/m³ at STP), making it important for applications like fuel cells, airships, and scientific research.

4. Using the Calculator

Tips: Enter the hydrogen density in kg/m³ (default 0.0899 kg/m³ for STP). The value must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What's the density of hydrogen at STP?
A: At standard temperature and pressure (STP), hydrogen has a density of about 0.0899 kg/m³ or 8.99 × 10⁻⁵ g/mL.

Q2: Why is hydrogen's density so low?
A: Hydrogen is the lightest element, with just one proton and one electron, resulting in very low mass per volume.

Q3: How does temperature affect hydrogen density?
A: Density decreases with increasing temperature (at constant pressure) according to the ideal gas law.

Q4: What's the practical significance of this conversion?
A: Many scientific applications use g/mL, while engineering often uses kg/m³, requiring conversion between units.

Q5: How accurate is this conversion?
A: The conversion is mathematically exact, but actual hydrogen density varies with temperature and pressure conditions.