Answer:
ph = 4.73
Explanation:
Determine the pH of a 0.62 M NH4NO3 solution at 25C
The Kb for NH3 is 1.76 x 10^-5
NH4+ is the conjugate acid of the base NH3
Ka for NH4+ = K water / K NH3 conjugate base
Ka = 1 × 10⁻¹⁴ / 1.76 10⁻⁵
= 5.68 × 10⁻¹⁰
which is he Ka for
NH4 + H2O --> NH4OH + H⁺
Ka = [NH4OH] [H+] / [NH4)+]
5.68 × 10⁻¹⁰ = [X] [X] / [0.62]
X² = 3.52 × 10⁻¹⁰
X = [H+] = 1.88 × 10⁻⁵
p of that H+ = 4.73
ph = 4.73
Explanation:
A.
P = Ds * g * h
Height, h = 5053 ft
In m,
1541.165 m
g = 9.81 m/s^2
SG = density of substance, Ds/density of water
1.03 = Ds/1000
= 1030 kg/m^3
P = 1030 * 9.81 * 1541.165
= 1.56 x 10^7 N/m^2
1 Psi = 6894.76 Pa = 6894
76 N/m^2
= 2258.6 psig.
B.
Pressure = 4400 psig
Since,
1 Psi = 6894.76 Pa = 6894
76 N/m^2
= 3.03 x 10^7 Pa
Density = 3.03 x 10^7/(1541.165 * 9 81)
= 2006.6 kg/m^3
SG = density of substance, Ds/density of water
= 2006.6/1000
= 2.01.
C.
Density of barite = 4.370 * 1000
= 4370 kg/m^3
Total mass of slurry = mass of barite + mass of seawater
= 1030 + 4370
= 5400 kg in 1 m3 of slurry.
Mass fraction = mass of barite/total mass of slurry
= 4370/5400
= 0.81.
D.
The mud weight is a key factor. Too low mud weight may result in collapse problems, hence spill of the well will not be contained. This is because of the pressure of escaping oil against a column of fluid (the mud) having a density significantly higher than those of seawater and oil.
Answer:
Explanation:
Equilibrium reactions are reversible reactions.
The general expression for equlibrium reactions is:
Which means that A produces B and B produces A. Those are two reactions:
- Direct or forward reaction: A → B (the arrow points from left to the right)
- Reverse reaction: A ← B (the arrow points from right to left).
So, in the direct reaction A is the reactant and B is the product, and in the reverse reaction A is the product and B is the reactant.
When you start with only A, only A is reacting and since the rate of reaction is proportional to the concentration of the reactants the rate of the direct reaction is high. As the reaction proceeds B appears and the concentration of A decreases, so the rate of the direct reaction decreases and the rate of the reverse reaction increases. At some moment the rate of both direct and reverse reactions are equal and the dynamic chemical equilibrium is reached.
Answer:
A lead apron is a <u>non-critical </u> instrument.
Hope it helps!
Answer:3 atoms of Mg 6 atoms of O and 6 atoms of H
Explanation: