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A 0.75kg sample of gaseous monatomic Helium (He) has an rms velocity of 2500m/s in an...

A 0.75kg sample of gaseous monatomic Helium (He) has an rms velocity of 2500m/s in an insulated container of 0.8m3. Need full equations for questions below.

A) what is the pressure of the gas?

B)What is the temperature of the gas?

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