Q.
Active mass of eight grams of oxygen at STP is
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a
122.4
b
15.6
c
111.2
d
116.8
answer is A.
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Detailed Solution
At STP a mole of O2 will occupy 22.4l of volume.moles of O2=8/32=0.25Active mass = conc. in mol L−1Volume = 1 mole of O2= 22.4l0.25 mole of O2 =22.4 × 0.25 = 5.6lActive mass of O2 = 0.25/5.6 = 0.0446mole/L
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