Answer is: pH of methylamine
is 11.78.<span>
</span>
Chemical reaction: CH₃NH₂(aq)+
H₂O(l) ⇌ CH₃NH₃⁺(aq) + OH⁻<span>(aq).
Kb(CH</span>₃NH₂) =
4,4·10⁻⁴.<span>
c</span>₀(CH₃NH₂) = n(CH₃NH₂) ÷ V(CH₃NH₂).
c₀(CH₃NH₂) = 0.070 mol ÷ 0.8 L = 0.0875 M.
c(CH₃NH₃⁺) = c(OH⁻) = x.
c(NH₂OH) = 0.0875 M - x; equilibrium concentration of methylamine.
Kb = c(CH₃NH₃⁺) · c(OH⁻) / c(CH₃NH₂).
0.00044 = x² / (0.0875 M - x).
Solve quadratic equation: x = c(OH⁻) = 0.00598 M.
pOH = -log(0.00598 M) = 2.22.
pH = 14 - 2.22 = 11.78.
Answer:
1200 metric tons = 2645547 pounds
Explanation:
We need to find twelve hundred metric tons of solid waste is how many pounds.
For this, we must know the conversion from metric tons to pounds.
1 metric tons = 2204.62 pounds
To convert 1200 metric tons, multiply 2204.62 by 1200 as follows :
1200 metric tons = 2204.62 × 1200 pounds
= 2645547 pounds
Hence, twelve hundred metric tons of solid waste is equal to 2645547 pounds.
Hey there!
1 mole has 6.022 x 10²³ atoms.
Multiply that by 3.2 because we have 3.2 moles.
3.2 x 6.022 x 10²³
1.9 x 10²⁴
There are 1.9 x 10²⁴ atoms in 3.2 moles of chromium.
Hope this helps!
Answer:
Because it uses the residual energy of the fluid used by the first engine.
Explanation:
A combined cycle power generation counts with two heat engines that work in tandem from the same source of heat. The engines turn the energy into mechanical energy.
The cycle is much more efficient than the other, almost 60% more.
I hope this answer helps you.
