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allochka39001 [22]
4 years ago
9

___energy is required to start a reaction?

Chemistry
1 answer:
aleksandr82 [10.1K]4 years ago
3 0

Answer:

The energy required to start a reaction is called the ACTIVATION ENERGY.

Explanation:

Enzymes are proteins that function as biological catalysts to speed up the rate of chemical reactions in cell without being changed into a different molecule.

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Sodium hydroxide, NaOH; sodium phosphate, Na3PO4; and sodium nitrate, NaNO3, are all common chemicals used in cleanser formulati
Sholpan [36]
Start by writing out molar mass of each component: 

1) NaOH= 22.99+16+1.01 --> 40 

2) Na₃PO₄= (22.99)3 + 94.97 + 64 --> 227.94

3) NaNO₃= 22.99 + 14 + 48 --> 84.99 

Now compare the mass of sodium with the rest of the substances: 

1) (22.99/40)100%= 57.475%

2) (68.97/227.94)/100%= 30.25% 

3) (22.99/84.99)/100%= 27.05%

As seen, the ordered list is: Sodium hydroxide, sodium phosphate and sodium nitrate. 

Hope I helped :) 
8 0
4 years ago
4. Cuál es la aplicación de las reacciones de óxido-reducción en la vida diaria y en la industria?
12345 [234]

Answer:

<em>Dentro de las aplicaciones de la óxido-reducción se pueden encontrar:</em>

  1. <u><em>La obtención del aluminio a partir de la alúmina y la electrolisis.</em></u>
  2. <u><em>La obtención de cloro, hidrógeno e hidróxido de sodio a partir del cloruro de sodio y la electrolisis.</em></u>
  3. <u><em>La combustión interna de un motor a gasolina u otro combustible fósil.</em></u>
  4. <u><em>Las termoeléctricas, las cuales para generar energía realizan combustión de carbón.</em></u>
  5. <u><em>La galvanoplastia, donde para evitar la corrosión de un metal se recubre con otro metal más resistente, por ejemplo: el recubrimiento del acero con zinc.</em></u>
  6. <u><em>La pilas o baterías de las cuales se obtiene energía química</em></u><em>.</em>

Explanation:

<em>Como puedes ver en la respuesta, la óxido-reducción tiene diversas aplicaciones en la vida moderna, desde todos los tipos de combustión los cuales sirven para brindar energía o movilizarte, hasta todas las funciones que se le ha dado a la electrolisis y a la obtención de la energía por medios químicos, incluso se puede considerar una aplicación de la óxido-reducción la incorporación de antioxidantes en los alimentos, los cuales disminuyen la velocidad de descomposición de los mismos. </em>

3 0
4 years ago
Please help will reward brainliest
Nastasia [14]

I'm not positive what evaporations you need but I have these.....

1. Wind assists evaporation; for example in clothes dry faster under a fan.

2. Heat assists evaporation; for example, in summer clothes dry faster than in winter.

3. Increase in surface area exposed assists evaporation; for instance, a wet cloth spread out dries faster than when folded.

4. Dryness assists evaporation; for instance, clothes dry faster in summer than during the monsoon when the air is humid.

5. The rate of evaporation depends upon the nature of the liquid; for example, petrol evaporates faster than water.

6. Vapor pressure: if pressure is applied on the surface of a liquid, evaporation is hindered; consider, for example, the case of a pressure cooker.

8 0
3 years ago
Which type of metal atoms affect the flame color ?
QveST [7]
The color emitted be larger atoms is lower in energy then the light emitted by smaller atoms
4 0
3 years ago
A student calculates the mass of a piece of copper to be 8.3 grams. The actual mass of the copper is 10. grams. What is the perc
jok3333 [9.3K]

<u>Answer:</u>

17%

<u>Explanation:</u>

Mass of a piece of copper calculated by student = 8.3 grams

Actual mass of copper = 10 grams

We know the formula for the percent error:

Percentage error = (| experimental value - actual value | / actual value) * 100

So substituting the given values in the above formula:

Percent error = (|8.3 - 10| / 10) * 100 = (1.7/10) * 100 = 17%

3 0
4 years ago
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