The Ecell for the following concentration cell at 25 °C is 0.006 V.
Pt ∣ H2 (g,0.025 atm)∣ H+ (0.012 M) 
H+ (1 M)∣ H2 (g,1 atm)∣ Pt
2 H+(aq)+ 2 e- → H2(g)E° = 0.V
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