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Elan Coil [88]
3 years ago
15

CHEMISTRY HELP PLEASE?!?! WILL MARK BRAINLIEST ANSWER! help a mate out? :((

Chemistry
1 answer:
Zolol [24]3 years ago
7 0
The attachments dont work, they say that they have been taken down or sum... ?
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What ion do most basic compounds contain?<br> A. H2O<br> B. H2O-<br> C. OH-<br> D. H-
mel-nik [20]
C is the correct answer I think
4 0
3 years ago
Explain why quartz, SiO2(s), does not spontaneously decompose into silicon and oxygen at 25 °C in the reaction: SiO2 (s) → Si(s)
elixir [45]

Answer:

ΔH > O and ΔH > TΔS

Explanation:

When a reaction is non-spontaneous even though the standard entropy change of the reaction is large and positive the reason is the reaction is highly endothermic and dominates the term TΔS in the standard Gibbs free energy expression:

ΔG = ΔH-TΔS

Remember that for an endothermic  reaction to be spontaneous ΔG < 0 and this can occur only if the term TΔS is greater than ΔH. This is not the case for quartz which requires a good quantity of energy to overcome its crystaline 3D lattice in which  the oxygen are shared between 2 silicon atoms.

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4 years ago
Heat required to raise 1 g of a substance 1°C
Oksana_A [137]

Answer:

Specific heat

Explanation:

7 0
3 years ago
Which of the changes will always be true for a spontaneous reaction
I am Lyosha [343]
Answer is: - delta G.The change in Gibbs free energy (ΔG), at constant temperature and pressure, is: ΔG=ΔH−TΔS.ΔH is the change in enthalpy.ΔS is change in entropy.T is temperature of the system.When ΔG is negative, a reaction (occurs without the addition of external energy) will be spontaneous (exergonic).
4 0
3 years ago
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Una reacción química es un proceso en el cual se produce un cambio químico, es decir, se consume una o más sustancias a medida q
Pani-rosa [81]

Answer:

Para ser mas exactos una reaccion quimica es donde los reactivos se transforman en productos.

Explanation:

Durante las reacciones quimicas, ocurren ciertas transformaciones que hace que se tome o se libere energia del medio, generando que los reactivos de la reaccion, es decir los compuestos iniciales, en un determinado espacio y tiempo bajo ciertas condiciones de presion y temperatura exactas se transformen en productos.

Para la quimica, la misma cantidad de materia que se encuentra en los reactivos se mantendra en los productos, es por eso que cada reaccion quimica debe respetar las reglas de la estequiometria y estar balanceadas a la perfeccion.

7 0
3 years ago
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