The root mean square speeds at STP for the gases , , and HBr are in the order : — States of Matter and Gaseous State Chemistry Question

💡 Solution & Explanation

Root Mean Square velocity is given by the following formula- r.m.s 3RT v M where, R=Universal Gas Constant T= Temperature M=Molar Mass From the formula, we can say that root mean square velocity is inversely proportional to the Molar mass. Therefore, higher the mass, lower will be the root mean square velocity. The Molar Mass of the following compound is 2 2 2 2 28 32 80.91 H N O HBr Thus, the correct option is (b) 2 2 2 HBr O N H