What would the volume of a gas be at -150°C, if it had a volume of 693 mL at 45°C?

d is

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the answer for sodium is 0.186

the answer for rubidium is 0.251

a gas, having a molecular weight of 13 kg/kmol and a kinematic viscosity of 0.25 cm2/s, flows through a pipe 0.25 m internal diameter and 5 km long at the rate of 0.4 m3/s and is delivered at atmospheric pressure.