Answer:
Algo importante sobre el balance de una reacción química es la ley de la conservación de la masa que establece que la masa no se crea ni se destruye sólo se transforma de modo que en una reacción química la suma de la masa de los reactivos debe ser igual a la suma de la masa de los productos.
Por ejemplo: La fermentación de la glucosa es una reacción química balanceada que da como resultado etanol y dióxido de carbono.
C₆H₁₂O₆ → 2C₂H₆O +2CO₂
Calculando la masa de los reactivos y productos, se debe cumplir la ley de la conservación de la masa:
C₆H₁₂O₆= 6*12+12*1+6*16=180 g/mol
C₂H₆O= 2*12+6*1+16=46 g/mol
CO₂=12+2*16=44 g/mol
C₆H₁₂O₆ → 2C₂H₆O + 2CO₂
180 g/mol = 2*46 g/mol + 2*44 g/mol
180 g/mol = 92 g/mol + 88 g/mol
180 g/mol = 180 g/mol
In order for a certain reaction to be spontaneous, the change in Gibb's free energy must be negative, that is:
dG < 0
We can calculate dG using:
dG = dH - dS
When we plug in the given values, we see that the sign of dG will never be negative; therefore, the reaction will not be spontaneous under any conditions.
Answer: secondary structure
Explanation:
The order of reactivity series is Most reactive metals are at the top while the least reactive metals are at the bottom.
A reaction series is a list of metals arranged in descending order of reactivity. The most reactive metals are on top and the least reactive metals are on the bottom. If there are any two metals in the column, the metal placed at the top of the column can displace the bottom metal from the brine.
The more reactive the metal the faster the reaction. Metals below hydrogen in the reaction sequence do not react with dilute acids. Platinum is placed below gold in the reaction sequence. The elements in the lower left corner of the periodic table are the most active metals in the sense that they are the most reactive.
Learn more about The Reactivity series here:- brainly.com/question/17469010
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The answer is
C. Control reaction rate
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