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GREYUIT [131]
3 years ago
15

Based on its position in the periodic table, the element sulfur would be expected to have how many valence electrons? A: 4 B: 6

C: 8 D: 16
Chemistry
2 answers:
ExtremeBDS [4]3 years ago
8 0
C. 6 Valence electrons. Remember that the family that they are in will determine the number of valence electrons that element will have. Sulfur is in family 16 so it will have 6 Valence electrons.
satela [25.4K]3 years ago
3 0
B: 6 because it is located in group 6. It has 16 electrons, two on the inner shell, 8 on the next shell and 6 on the outer shell.
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algol [13]

Answer:

The amount of energy released from the combustion of 2 moles of methae is 1,605.08 kJ/mol

Explanation:

The chemical reaction of the combustion of methane is given as follows;

CH₄ (g) + 2O₂ (g) → CO₂ (g) + 2H₂O (g)

Hence, 1 mole of methane combines with 2 moles of oxygen gas to form 1 mole of carbon dioxide and 2 moles of water vapor

Where:

CH₄ (g): Hf = -74.6 kJ/mol

CO₂ (g): Hf = -393.5 kJ/mol

H₂O (g): Hf = -241.82 kJ/mol

Therefore, the combustion of 1 mole of methane releases;

-393.5 kJ/mol × 1 + 241.82 kJ/mol × 2 + 74.6 kJ/mol = -802.54 kJ/mol

Hence the combustion of 2 moles of methae will rellease;

2 × -802.54 kJ/mol or 1,605.08 kJ/mol.

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Sort the examples based on whether they describe a physical change or a chemical reaction. growth of a seed into a seedling tarn
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Answer: I did the research myself since I couldn’t find the answers.

Physical change:

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Answer:

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Explanation:

The chemical formula of a compound is a representation which shows all the elements therein and the mole relationship between them expressed as subscripts.

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