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AnnyKZ [126]
3 years ago
8

El porcentaje

Chemistry
1 answer:
qwelly [4]3 years ago
3 0

Answer:

Si.

Explicación:

Si, el porcentaje  en masa, porcentaje en volumen y partes por millón son formas  de métodos cuantitativos que representa la concentración de una solución. Estos métodos muestran la cantidad de solvente y soluto que está presente en la solución. El soluto es la parte de la solución que está presente en una pequeña cantidad mientras que, por otro lado, el solvente es la parte de la solución que está presente en una gran cantidad en la solución. Estos métodos proporcionan información sobre la cantidad de elementos o soluto en un compuesto dado.

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Elza [17]

Answer: A. the chemical change will occur faster in beaker X.

Explanation:

Temperature is one of the factors that affect the rates of chemical reactions. Increase in temperature increases the rates of reaction by increasing the kinetic energy of the reacting particles so that energetic collisions occur and more bonds in the reactants will be broken and; atoms and ions recombine to form new compounds. Beaker X which is at room temperature has higher temperature than beaker Y which is kept in the refrigerator, thus reacting particles in beaker X has more kinetic energy than the ones in beakerA. the chemical change will occur faster in beaker X. Y.

8 0
4 years ago
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The following equation shows the equilibrium in an aqueous solution of ammonia: NH3(aq)+H2O(l)⇌NH4+(aq)+OH−(aq)NH3(aq)+H2O(l)⇌NH
yarga [219]

Answer:

c) H2O and OH−

Explanation:

Acids are the species which furnish hydrogen ions in the solution or is capable of forming bonds with electron pair species as they are electron deficient species.

When an acid donates a proton, it changes into a base which is known as its conjugate base.

Bases are the species which furnish hydroxide ions in the solution or is capable of forming bonds with electron deficient species as they are electron rich species. When a base accepts a proton, it changes into a acid which is known as its conjugate acid.

The acid and the base which is only differ by absence or presence of the proton are known as acid conjugate base pair.

Thus,  for the reaction,

NH_3+H_2O\rightleftharpoons Nh_4^++OH^-

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Also, The base is OH^- and the conjugate acid of the base is H_2O.

<u>Correct option is :- c) H2O and OH−</u>

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3 years ago
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STatiana [176]
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Dennis_Churaev [7]

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the top of the roller coaster

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