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oksian1 [2.3K]
3 years ago
7

The enthalpy of a reaction can be measured using a _____. barometer chronometer odometer calorimeter

Chemistry
2 answers:
ANTONII [103]3 years ago
8 0

Answer : The correct option is, Calorimeter

Explanation :

Calorimeter : It is a device that is used to measure the amount of heat involved in a chemical process or physical process.

Barometer : It is a device that is used to measure the air pressure.

Chronometer : It is a device that is used to measure the time.

Odometer : It is a device that is used to measure the distance.

Hence from the given options, the enthalpy of a reaction can be measured using a calorimter.

Dima020 [189]3 years ago
3 0
The answer you are looking for is Calorimeter
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18.2 g.

Explanation:

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Select the situation below that would produce a total displacement of zero
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A solution is made by combining 500 mL of 0.10 M HF (Ka=7.2 x 10^-4) with 300 mL of 0.15 M NaF. What is the pH of the resulting
n200080 [17]

Answer:

b) 3.10

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HF ⇄ H + + F

Using Henderson-Hasselbalch Equation:

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Hence, pKa of HF = -log 7.2 x 10^-4 = 3.14266

[A-] = concentration of conjugate base after dissociation = moles of base/total volume

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[HA] = concentration of the acid = moles of acid/total volume

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                    = 0.0625 M

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pH = 3.14266 + log [0.05625/0.0625]

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           = 3.09691250944

<em>From all the available options below:</em>

<em>a) 2.97 </em>

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3 years ago
Propiedades químicas del óxido​
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Óxidos neutros: Son compuestos por no metales. No reaccionan con agua, ácido o base, en razón del enlace covalente que une sus componentes; de ahí el por qué de ser llamados óxidos inertes. Ejemplos: monóxido de dinitrógeno (N2O) y monóxido de carbono (CO).

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Óxidos dobles o mixtos: La combinación de dos óxidos de un mismo elemento, da origen a este tipo de óxidos. Ejemplo: magnetita (Fe2O4), unión de los óxidos de hierro (Fe) y oxígeno (O).

Óxidos anfóteros: Presentan ambigüedad, en la presencia de un ácido se comportan como óxidos básicos y en la presencia de una base, como óxidos ácidos. Ejemplos: óxido de aluminio (Al2O3 ) y el óxido de zinc (ZnO).

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