Question
Define unified mass.
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4NH3(g) + 5O2(g) → 4NO(g) + 6H2O(g)
| Isotope | Isotopic molar mass | Abundance |
| ${ }^{36} Ar$ | $35.96755 g mol ^{-1}$ | $0.337 \%$ |
| ${ }^{38} Ar$ | $37.96272 g mol ^{-1}$ | $0.063 \%$ |
| ${ }^{40} Ar$ | $39.9624 g mol ^{-1}$ | $99.600 \%$ |
$\text{Cu}|\text{Cu}^{2+}\text{(aq)}\|\text{Ag}^+\text{(aq)}|\text{Ag}$
If its two half cells work under standard conditions, calculate the emf of the cell.
$\Big[\text{Given E}^\circ_{\frac{\text{Cu}^{2+}}{\text{Cu}}}=+0.34\text{V},\text{E}^\circ_{\frac{\text{Ag}^+}{\text{Ag}}}=+0.80\text{V}\Big]$