The cyanide is

A carbon atom has 4 valance electrons and nitrogen has 5. Below is a Lewis-dot-structure of cyanide.
:N≡C.
The carbon atom is still one electron short of having a full octet and so it will seize another electron from almost anything, making the cyanide ion negative and whatever it took the electron from it now positive.
Answer:
The answer to your question is 3.5 moles of I₂
Explanation:
Data
moles of I₂ = ?
moles of KI = 7
Balanced chemical reaction
2KI ⇒ 2K + I₂
Process
To solve this problem use proportions and cross multiplication. Use the coefficients of the balanced chemical reaction for this proportion.
2 moles of KI --------------------- 1 mol of I₂
7 moles of KI -------------------- x
x = (7 x 1) / 2
-Simplifying
x = 7/2
-Result
x = 3.5 moles of I₂
D. An organism stops taking in carbon when it dies.
Answer:
Au3+(aq) + 3Cu+(aq) → Au(s) + 3Cu2+(aq)
1.35 V
Explanation:
Given that the reduction potential of
Cu^2+(aq) + e- -----> Cu^+(aq) is +0.15 V
While the reduction potential of
Au3+(aq) + 3 e- -----> Au(s) is + 1.50V
It is clear that the Cu^+(aq)/Cu^2+(aq) system is the anode while Au^3+(aq)/Au(s) system is the cathode based on the reduction potentials shown above. The number of electrons transferred (n) =3
E°cell = E°cathode - E°anode
E°cell= 1.50-0.15
E°cell= 1.35 V