The transformation occurring in Duma's method is given below: P \[ ...

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The transformation occurring in Duma's method is given below:
P
\[
\mathrm{C}_{2} \mathrm{H}_{7} \mathrm{~N}+\left(2 x+\frac{y}{2}\right) \mathrm{CuO} \rightarrow x \mathrm{CO}_{2}+\frac{y}{2} \mathrm{H}_{2} \mathrm{O}+\frac{z}{2} \mathrm{~N}_{2}+\left(2 x+\frac{y}{2}\right) \mathrm{Cu}
\]
W
The value of \( y \) is. (Integer answer)
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