Answer :

Final answer:

The root mean square velocity of I2 (g) at 373 K is approximately 191 m/s.

Explanation:

To calculate the root mean square velocity of I2 (g) at 373 K, we can use the formula:

Urms = sqrt(3RT/M)

Where Urms is the root mean square velocity, R is the gas constant, T is the temperature in Kelvin, and M is the molar mass of I2. Since the molar mass of I2 is 253.8 g/mol, we need to convert it to kilograms: 0.2538 kg/mol.

Plugging in the values, we get:

Urms = sqrt(3 * 8.314 J/(mol*K) * 373 K / 0.2538 kg/mol) = 191 m/s

Therefore, the root mean square velocity of I2 (g) at 373 K is approximately 191 m/s.

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