Equal moles of hydrogen and oxygen gases are placed in container with pin hole through which both can escape. What fraction of the oxygen escapes in the time required for one half of the hydrogen to escape?
(1) 1/4
(2) 3/8
(3) 1/2
(4) 1/8
(1) 1/4
(2) 3/8
(3) 1/2
(4) 1/8