Draw the structural formula for a hydrogen molecule (H2) and an oxygen molecule (O2). Remember that each line represents an elec
tron pair being shared
2 answers:
Answer : The structural formula for a hydrogen molecule and an oxygen molecule are shown below.
Explanation :
Structural formula : In the structural formula, the bonding and type of bonds which holds the atoms in molecule together are shown.
First we have to determine the Lewis-dot structure.
Lewis-dot structure : It shows the bonding between the atoms of a molecule and it also shows the unpaired electrons present in the molecule.
In the Lewis-dot structure the valance electrons are shown by 'dot' and two dots combine to form a single bond.
The given molecule is,
As we know that hydrogen has '1' valence electron.
Therefore, the total number of valence electrons in = 2(1) = 2
According to Lewis-dot structure, there are 2 number of bonding electrons and 0 number of non-bonding electrons. That means, there are 1 electron pairs being shared between the hydrogen-hydrogen atom.
The given molecule is,
As we know that oxygen has '6' valence electron.
Therefore, the total number of valence electrons in = 2(6) = 12
According to Lewis-dot structure, there are 4 number of bonding electrons and 8 number of non-bonding electrons. That means, there are 2 electron pairs being shared between the oxygen-oxygen atom because oxygen has ability to form double bond.
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Answer:
12.29 M
Explanation:
- The reaction that takes place is:
H₂SO₄ + 2NaOH → 2Na⁺ + SO₄⁻² + 2H₂O
- Now let's calculate the <u>moles of H₂SO₄ that were titrated</u>:
= 0.01229 mol H₂SO₄.
- Thus, the <u>concentration of the diluted solution is</u>:
0.01229 mol H₂SO₄ / 0.010 L = 1.229 M
- Finally, the <u>concentration of the original acid solution is:</u>
= 12.29 M
The δs∘rxn for the reaction →
will be -146 J/K.
Entropy would be a measurable physical characteristic and a scientific notion that is frequently connected to a condition of disorder, unpredictability, or uncertainty.
Entropy would be a measurement of the system's unpredictability or disorder. The entropy increases as randomness do. It has broad properties as well as a state function. It has the unit .
Entropy of the reaction can be calculated by the reaction.
Δ = 2 mol ×
×
- 1 mol ×
Δ = 2 mol × 240 J/mol.K - 2 mol × 210 J/mol.K-1 mol ×205.2 J/mol.K
Δ = -146.8 J/K
Therefore, the δs∘rxn for the reaction →
will be -146 J/K.
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