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4 years ago

Which drawing below best represents hydrogen bonding methanol, ch3oh?

Chemistry

1 answer:

madam [21]4 years ago

4 0

Hydrogen Bond Interactions are formed between Hydrogen atom attached to more electronegative atom (F, O or N) of one molecule and highly electronegative atom (F, O or N) of another molecule. In case of methanol, hydrogen is bonded directly to oxygen atom and gets partial positive charge, this hydrogen atom interacts with Oxygen (Highly electronegative) atom of second molecule. Hydrogen bonding are stronger due to which methanol has greater b.p (64.7 ⁰C) as compared to methane (-161.5 ⁰C).

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What is the reduction potential of a hydrogen electrode that is still at standard pressure, but has ph = 5.65 , relative to the

Zigmanuir [339]

Answer:

$\boxed{\text{-0.275 V}}$

Explanation:

We must use the Nernst equation

$E = E^{\circ} - \dfrac{RT}{zF} \ln Q$

1. Write the equation for the cell reaction

If you want the reduction potential, the pH 5.65 solution is the cathode, and the cell reaction is

E°/V

Anode: H₂(1 bar) ⇌ 2H⁺(1 mol·L⁻¹) + 2e⁻; 0

Cathode: 2H⁺(pH 5.65) + 2e⁻ ⇌ H₂(1 bar); 0

Overall: 2H⁺ (pH 5.65) ⇌ 2H⁺(1 mol·L⁻¹); 0

Step 2. Calculate E°

(a) Data

E° = 0

R = 8.314 J·K⁻¹mol⁻¹

T = 25 °C

n = 2

F = 96 485 C/mol

pH = 5.65

Calculations:

T = 25 + 273.15 = 298.15 K

$\text{H}^{+} = 10^{\text{-pH}} = 2.24 \times 10^{-5}\text{ mol/\L}\\\\Q = \dfrac{\text{[H}^{+}]_{\text{prod}}^{2}}{\text{[H}^{+}]_{\text{react}}^{2}} = \dfrac{(1.00)^{2}}{(2.24 \times 10^{-5})^{2}} =2.00 \times 10^{9}\\\\\\E = 0 - \left (\dfrac{8.314 \times 298.15 }{2 \times 96485}\right ) \ln{2.00 \times 10^{9}}\\\\= -0.01285 \times 21.41 = \textbf{-0.275 V}\\\text{The cell potential for the cell as written is }\boxed{\textbf{-0.275 V}}$

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3 years ago

Which subatomic particles have a positive charge and are located in the nucleus?

d1i1m1o1n [39]

Answer: Atomic Particles

Explanation:

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