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Free_Kalibri [48]
3 years ago
12

Select the correct answer.

Chemistry
1 answer:
Ilya [14]3 years ago
3 0

Answer:

C is the answer hope I helped you have a good day by

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1. El metodo cientifico pretende sistematizar el proceso de obtención del conocimiento cientifico, evitar la subjetividad en los
____ [38]

Answer:

La afirmación es verdadera.

Explanation:

El método científico es un método de  investigación usado principalmente en la producción de conocimiento en las ciencias y se define como un procedimiento para tratar un conjunto de problemas. En ciencia, el método científico es la estrategia para la investigación y la exploración de lo desconocido.

Por lo que el método científico es el procedimiento mediante el cual es posible alcanzar un  conocimiento objetivo de la realidad, tratando de dar respuesta a las interrogantes  acerca del orden de la naturaleza.

Para ser científico, un método de investigación debe basarse en la empírica y en la  medición, sujeto a los principios específicos de las pruebas de razonamiento.

El método científico se basa en la reproducibilidad, es decir, la  capacidad de repetir un determinado experimento, en cualquier lugar y por cualquier  persona, y la refutabilidad,  es  decir toda proposición científica tiene que ser susceptible de  ser falsada o refutada.

Entonces <u><em>la afirmación es verdadera.</em></u>

6 0
3 years ago
Oxyacetylene torches produce such high temperature that they are often used to weld and cut metal. When 1.53 g of acetylene (C2H
hodyreva [135]

Answer: 4403kJ/mole

Explanation:

First we have to calculate the heat absorbed by bomb calorimeter  

Formula used :

q_b=c_b\times (T_{final}-T_{initial})

q_b = heat absorbed by calorimeter = ?

c_b = specific heat of = 10.69 kJ/K

T_{final} = final temperature = 44.688^oC=(273+44.688)K=317.688K

T_{initial} = initial temperature = 20.486^oC=(273+20.486)K=293.486K

q_b=10.69kJ/K\times (317.688-293.486)=258.7kJ

As heat absorbed by calorimeter is equal to the heat released by acetylene during combustion.

Thus 1.53 gram of acetylene releases heat of combustion = 258.7kJ

So, 26.04 g/mole of acetylene releases heat of combustion \frac{258.7}{1.53}\times 26.04=4403kJ/mole

Therefore, the heat of combustion of acetylene is, 4403kJ/mole

7 0
4 years ago
Calculate the amount of heat released when one bottle (250 g) of water is cooled from 30oC to 25oC. The specific heat of water i
Ulleksa [173]

Answer:

The amount of heat released is -5,232.5 J

Explanation:

Calorimetry is the measurement and calculation of the amounts of heat exchanged by a body or a system.

The amount of heat received or transferred by a body when it undergoes a temperature variation (Δt) without there being a change of physical state (solid, liquid or gaseous) is calculated by the expression:

Q = c * m * ΔT

Where Q is the heat exchanged by a body of mass m, made up of a specific heat substance c and where ΔT is the temperature variation.

In this case:

  • Q=?
  • c=4.186 \frac{J}{g*C}
  • m= 250 g
  • Δ=Tfinal - Tinitial= 25°C - 30°C= -5 °C

Replacing:

Q= 4.186 \frac{J}{g*C} *250 g* (-5°C)

Solvng:

Q= -5,232.5 J

The amount of heat released is -5,232.5 J

3 0
4 years ago
Write a balance chemical equation for the ammonia react with carbon dioxide
Roman55 [17]

Answer:

i hope i helps

Explanation:

8 0
3 years ago
atomic size of element increasing with increasing in number of shell in the third period of periodic table name the smallest ele
Mars2501 [29]

Answer:

Argon (Ar) is smallest element in 3rd period in periodic table.

3 0
4 years ago
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