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# The ratio between the root mean square speed of H2 at 50 K and that of O2 at 800 K is:a)4b)2c)1d)¼Correct answer is option 'C'. Can you explain this answer? Related Test: Test: Gaseous State- 1

## Chemistry Question

By Divya Murali · 3 days ago ·Chemistry
2 Answers
Aman Thakur answered May 29, 2018
Expression of rms is : urms = √(3RT/M) ⇒ (u_rms (H_2 at 50 K))/(u_rms (O_2 at 800 K) ) = √((3R x 50)/2)/√((3R x 800)/32) = √(50/2 x 32/800) = 1

Bharti Lekhwar answered Sep 10, 2018
The formula for finding rms speed of molecules is given by square root of 3RT/M and R is constant and M for hydrogen is 2 and that for oxygen is 32 and temperatures are given in the ques,, u can find out the ratio it will gives u the answer c

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