What is the decrease in volume of air when pyro... - JAMB Chemistry 2001 Question
What is the decrease in volume of air when pyrogallol is shaken with 30.00cm3 of air ?
A
15.00cm3
B
6.30cm3
C
0.63cm3
D
0.06cm3
correct option: b
% volume of O2 in air = 21%
∴ (21/100) * 30 = 6.3
∴ (21/100) * 30 = 6.3
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