Using Gay-Lussac's Law, pressure is proportional to (absolute) temperature in Kelvin. We first convert the temperature values to Kelvin: 110 C = 383.15 K, while 65 C = 338.15 K.

P1/T1 = P2/T2

22.5/383.15 = P2/338.15

P2 = 19.9 psi

<span>58.6934 +/- 0.0002 u</span>

**Answer: a) The concentration after 8.8min is 0.17 M**

**b) Time taken for the concentration of cyclopropane to decrease from 0.25M to 0.15M is 687 seconds.**

**Explanation:**

Expression for rate law for first order kinetics is given by:

where,

k = rate constant

t = age of sample

a = let initial amount of the reactant

a - x = amount left after decay process

**a) concentration after 8.8 min:**

**b) for concentration to decrease from 0.25M to 0.15M**

Answer is: sodium (Na) and iodine (I₂).

<span>
First ionic bonds in this salt are separeted
because of heat:

</span>NaI(l) → Na⁺(l) + I⁻(l).

Reaction of reduction
at cathode(-): Na⁺(l) + e⁻ → Na(l) /×2.

2Na⁺(l) + 2e⁻ → 2Na(l).

Reaction of oxidation
at anode(+): 2I⁻(l) → I₂(l) + 2e⁻.

The anode is positive
and the cathode is negative.