Assuming that air is a solution containing four molecules of N2 for every one molecule O2,what is the concentration of O2 in this solution,expressed as % (m/m) ? [Formula weights: N2,28.02 amu; O2,32.00 amu]
A) 22% (m/m)
B) 47% (m/m)
C) 53% (m/m)
D) 78% (m/m)
E) 114% (m/m)
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