Molecular Weight to Density Calculator

Formula

To calculate the Density from Molecular Weight (\(D\)):

\[ D = \frac{P \times MW}{R \times T} \]

Where:

\(D\) is the Density from Molecular Weight (kg/m³)
\(P\) is the pressure (Pa)
\(MW\) is the molecular weight (kg/mol)
\(T\) is the temperature (K)
\(R\) is the Universal Gas Constant (8.314)

What is Density from Molecular Weight?

Density from molecular weight is a calculation used to determine the density of a gas based on its molecular weight, pressure, and temperature. This is particularly useful in fields such as chemistry and engineering where understanding the properties of gases is essential.

Example Calculation 1

Let's assume the following values:

Pressure (\(P\)) = 101325 Pa
Molecular Weight (\(MW\)) = 0.02897 kg/mol (for air)
Temperature (\(T\)) = 298 K

Using the formula:

\[ D = \frac{101325 \times 0.02897}{8.314 \times 298} \approx 1.18 \text{ kg/m³} \]

The density is approximately 1.18 kg/m³.

Example Calculation 2

Let's assume the following values:

Pressure (\(P\)) = 202650 Pa
Molecular Weight (\(MW\)) = 0.04401 kg/mol (for CO₂)
Temperature (\(T\)) = 298 K

Using the formula:

\[ D = \frac{202650 \times 0.04401}{8.314 \times 298} \approx 3.00 \text{ kg/m³} \]

The density is approximately 3.00 kg/m³.