P1V1/n1T1 = P2V2/n2T2
THEREFORE 3 * 2/n1600 = 0.6 * 1 / 500 n2
on solving n2 = 0.6n1/5
as n2(MOLES REMAINING) < n1 (MOLES PRESENT INITIALLY), some gas must be allowed to escape = n1-n2= 4.4n1/5
n1 can be found by using PV =nRT
ND THE PERCENT OF GAS ESCAPED IS 4.4n1/5n1 *100 = 88%
Moderation Team
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