The temperature of a gas is \( -50^{\circ} \mathrm{C} \). To what temperature the gas should be ...

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The temperature of a gas is \( -50^{\circ} \mathrm{C} \). To what temperature the gas should be heated so that the rms speed is increased by 3 times?
(a) \( 223 \mathrm{~K} \)
(b) \( 669^{\circ} \mathrm{C} \)
(c) \( 3295^{\circ} \mathrm{C} \)
(d) \( 3097 \mathrm{~K} \)
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