Posted by **Kitty** on Tuesday, December 4, 2012 at 9:58pm.

Under constant pressure, a small basketball pump is filled with helium, He,

gas; the helium is then forced out of a small aperture in 2 seconds. The same

pump is filled with hydrogen bromide, HBr, gas. Under the same pressure,

how long will it take to force this gas out?

- Chemistry -
**DrBob222**, Tuesday, December 4, 2012 at 10:05pm
No volume is listed; let's make up a volume, say 2 L for He, then the rate is (2L/2sec) = 1 L/s. Then

rate1/rate2 = sqrt(M2/M1)

1/rate 2 = sqrt(80.9/4)

solve for rate 2, then rate = 2L/sec and solve for sec. Post your work if get stuck.

- Chemistry -
**Anonymous**, Thursday, May 8, 2014 at 12:13am
4505

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