At 400 K, which of the pairs of gases below would have the most nearly identical speeds?

the electron configuration that you gave me has 16 electrons ergo it has 16 protons ergo it is the element sulfur.

warm front forms when a moist, warm air mass slides up and over a cold air mass. as the warm air mass rises, it condenses into a broad area of clouds. a warm front brings gentle rain or light snow, followed by warmer, milder weather.

hope i !