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-Volume O2= 10 Liter
-Massa O2 pada keadaan standar (STP)= ? gram
A. Mencari mol pada saat STP (22,4)
n= V/22,4
= 10 L/22,4
= 0,446 mol
= 0,45 mol
B. Mencari massa O2
massa= n x Mr
= 0,45 mol x (2.16)
= 0,45 mol x 32
= 14,4 gram pada saat keadaan standar.