The average molar mass of air is 28.8. An open vessel at 27°C is heated upto t°C until 1/3rd of the — AITS & Test Series Chemistry Question

Question

The average molar mass of air is 28.8. An open vessel at 27°C is heated upto t°C until 1/3rd of the air measured at final temperature escapes out. The rms velocity of air molecules at t°C is (A) 340 m sec 1 (B) 420 m sec 1 (C) 515 m sec 1 (D) 588 m sec 1