JAMB - Chemistry (2001 - No. 13)
What is the decrease in volume of air when pyrogallol is shaken with 30.00cm\(^3\) of air ?
15.00cm3
6.30cm3
0.63cm3
0.06cm3
Објашњење
% Volume of O\)_2\) in air = 21%
∴(\(\frac{21}{100}\times30\)) = 6.30 cm\(^3\)
∴(\(\frac{21}{100}\times30\)) = 6.30 cm\(^3\)