V Part A Calculate the rms speed of an oxygen molecule at 6 . C. Express your answer to three significant figures and include the appropriate units. HA ? m Urms 246.08 S Submit Previous Answers Request Answer X Incorrect; Try Again; 5 attempts remaining Part B Determine how many times per second each molecule moving with rms speed would move back and forth across a 6.4 m -long room on the average, assuming it made very few collisions with other molecules. To find vr use the equation v = Ux + vy + v3 and the fact that molecules have no preferred direction. Express your answer using two significant figures.