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BARSIC [14]
3 years ago
14

Explain what is wrong with the following structure.

Chemistry
2 answers:
True [87]3 years ago
8 0

Hydrogen cannot have more than two electrons.

Hydrogen bonds to only one other atom at a time.

There are too many electrons in the final structure.

Lelu [443]3 years ago
6 0

Answer:

oxygen should be the central atom in the middle

Explanation:

hydrogens always go on the outside

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The change in internal energy for the combustion of 1.0 mol of octane at a pressure of 1.0 atm is -5084.1 kj . f the change in e
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<u>Given:</u>

Change in internal energy = ΔU = -5084.1 kJ

Change in enthalpy = ΔH = -5074.3 kJ

<u>To determine:</u>

The work done, W

<u>Explanation:</u>

Based on the first law of thermodynamics,

ΔH = ΔU + PΔV

the work done by a gas is given as:

W = -PΔV

Therefore:

ΔH = ΔU - W

W = ΔU-ΔH = -5084.1 -(-5074.3) = -9.8 kJ

Ans: Work done is -9.8 kJ


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If 25 mL of a HCl solution of unknown concentration was neutralized with 10 mL of a 0.30 M NaOH solution, what was the original
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Answer:

0.12 M

Explanation:

Step 1: Write the balanced equation

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Step 2: Calculate the reacting moles of NaOH

10 mL of a 0.30 M NaOH solution react.

0.010L \times \frac{0.30mol}{L} = 3.0 \times 10^{-3} mol

Step 3: Calculate the reacting moles of HCl

The molar ratio of NaOH to HCl is 1:1. The reacting moles of HCl are 1/1 × 3.0 × 10⁻³ mol = 3.0 × 10⁻³ mol.

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M = \frac{3.0 \times 10^{-3} mol}{0.025L} = 0.12 M

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