Homework Help: science; AP Chem

Posted by Anonymous on Friday, September 14, 2012 at 2:37pm.

Dinitrogen oxide (N2 O) gas was generated
from the thermal decomposition of ammo-
nium nitrate and collected over water. The
wet gas occupied 124 mL at 21◦ C when the
atmospheric pressure was 752 Torr. What vol-
ume would the same amount of dry dinitrogen
oxide have occupied if collected at 752 Torr
and 21 ◦ C? The vapor pressure of water is
18.65 Torr at 21◦C.
Answer in units of mL

science; AP Chem - DrBob222, Friday, September 14, 2012 at 3:07pm
P1V1 = P2V2
P1 = (752-18.65)= ?
V1 = 124 mL
P2 = 752
V2 = solve for this.
science; AP Chem - Anonymous, Friday, September 14, 2012 at 11:20pm
oooh okay, i didn't know how to do an equation that involved vapor pressure. Thank you!

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