Answer : The expression for reaction quotient will be :
![Q_c=\frac{[Zn^{2+}]}{[Ag^{+}]^2}](https://tex.z-dn.net/?f=Q_c%3D%5Cfrac%7B%5BZn%5E%7B2%2B%7D%5D%7D%7B%5BAg%5E%7B%2B%7D%5D%5E2%7D)
Explanation :
Reaction quotient (Qc) : It is defined as the measurement of the relative amounts of products and reactants present during a reaction at a particular time.
The given redox reaction is :

In this expression, only gaseous or aqueous states are includes and pure liquid or solid states are omitted.
The expression for reaction quotient will be :
![Q_c=\frac{[Zn^{2+}]}{[Ag^{+}]^2}](https://tex.z-dn.net/?f=Q_c%3D%5Cfrac%7B%5BZn%5E%7B2%2B%7D%5D%7D%7B%5BAg%5E%7B%2B%7D%5D%5E2%7D)
Hey there!
The molar mass of magnesium is 24.305 grams.
The molar mass of an element is the same as the atomic mass of an element, but measured in grams.
It's on the periodic table underneath the element symbol.
Hope this helps!
Answer: 0.3794 moles of Iodine gas are produced.
Explanation:

Volume of iodine gas produced at STP =8.5 L
At STP, the 1 mol of gas occupies volume = 22.4 L
So, 8.5 L of volume will be occupied by:
0.3794 moles of Iodine gas are produced.