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andre [41]
3 years ago
6

In the ground state, an atom of which element has seven valence

Chemistry
1 answer:
sweet-ann [11.9K]3 years ago
7 0

Answer:

Fluorine

Explanation:

Fluorine has 9 total electrons. The first two are in the 1s level, and the remaining electrons are on the outer level of the atom, with 2 in the s level and 5 in the p level. The electron configuration is 1s2 2s2 2p5.

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John Dalton and Antoine Lavoisier were alchemists who tried to convert diamonds to gold.
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4 years ago
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Cuando se quema 1 mol de metano –o sea, 16 g–, se desprenden 802
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Answer:

1 gramo de metano aporta 50.125 kilojoules.

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Explanation:

La cantidad de energía liberada por la combustión de una unidad de masa del hidrocarburo (Q), en kilojoules por mol, es igual a la cantidad de energía liberada por mol de compuesto (\bar {Q}), en kilojoules por mol, dividido por su masa molar (M), en gramos por mol:

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A continuación, analizamos cada caso:

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Q = \frac{802\,\frac{kJ}{mol} }{16\,\frac{g}{mol} }

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Octano

Q = \frac{5500\,\frac{kJ}{mol} }{114\,\frac{g}{mol} }

Q = 48.246\,\frac{kJ}{mol}

1 gramo de metano aporta 48.246 kilojoules.

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Answer:

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Explanation:

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