# Determine the pressure of hydrogen if the root-mean-square velocity of its molecules is 800

September 15, 2021 | education

| **Determine the pressure of hydrogen if the root-mean-square velocity of its molecules is 800m / s, and its density is 4.9kg / m3**

Initial data: Vav (mean square velocity of hydrogen molecules) = 800 m / s; ρ (hydrogen density) = 4.9 kg / m3.

The hydrogen pressure can be determined using the formula: P = 1/3 * ρg * Vav ^ 2.

Let’s perform the calculation: P = 1/3 * 4.9 * 800 ^ 2 = 1.045 * 10 ^ 6 Pa = 1.045 MPa.

Answer: The hydrogen pressure is 1.045 MPa.

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