Consider a given volume of helium gas at room temperature (20.0 °C). [Molar mass of helium is 4.00 × 10-³ kg mol−1] (i) Calculate the average speed <> of a molecule of the gas. Give your answer in scientific notation and specified to an appropriate number of significant figures, in the empty box below. = m s−1 (ii) At what temperature would the average translational energy of the gas be one third of the average translational energy at room temperature? Give your answer by entering numbers, specified to an appropriate number of significant figures, into the empty box below. temperature = K

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