In a fluorescent lamp in operating mode, the argon pressure is 500 Pa, the vapor pressure of mercury is 1 Pa.

univerkov | July 10, 2021 | education

In a fluorescent lamp in operating mode, the argon pressure is 500 Pa, the vapor pressure of mercury is 1 Pa. What is the ratio of the masses of these gases in the lamp?

To calculate the mass ratio of argon and mercury, we use the ratio: mAr / mHg = (PAr * V * MAr / (R * T)) / (PHg * V * MHg / (R * T)) = PAr * MAr / (PHg * MHg).

Constants and variables: PAr – argon pressure (PAr = 500 Pa); MAr is the molar mass of argon (MAr = 39.948 g / mol); PHg is the vapor pressure of mercury (PHg = 1 Pa); MHg is the molar mass of mercury (MHg = 200.592 g / mol).

Let’s calculate: mAr / mHg = PAr * MAr / (PHg * MHg) = 500 * 39.948 / (1 * 200.592) = 99.58 p.

Answer: The mass of argon in a fluorescent lamp is 99.58 r.

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