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At the same temperature and pressure 50 cm3 of ... - JAMB Chemistry 1994 Question

At the same temperature and pressure, 50 cm3 of nitrogen gas contains the same number of molecules as?
A
25 cm3 of methane
B
40 cm3 of hydrogen
C
50 cm3 of ammonia
D
100 cm3 of chlorine
correct option: c
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