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ioda
3 years ago
13

The complete combustion of 1.00 kg of coal releases about 3.0 x 10E7 J of energy. The conversion of 1.00 kg of mass into energy

is equivalent to the burning of how many metric tonnes of coal?
Chemistry
2 answers:
zalisa [80]3 years ago
3 0

Answer: 0.001 metric tonnes

Explanation:

According to Einstein equation, Energy and mass are inter convertible.

E=mc^2

E=  Energy

m = mass

c= speed of light

Given : Complete combustion of 1.00 kg of coal releases about 3.0\times 10^7 J of energy.

Given mass: 1 kg

Converting kg to metric ton using the conversion factor:

1 kg=0.001 metric tonnes

Thus 1 kg of coal would also be equal to 0.001 metric tonnes.

yKpoI14uk [10]3 years ago
3 0

Answer:

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Explanation:

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We have to get the formula of methionine.

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Determine el PH y el % de disociación de una solución de ácido débil, sabiendo que se disuelven 20 gramos del ácido (masa molar=
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pH = 4.27. Porcentaje de disociación: 0.03%

Explanation:

El pH de un ácido débil, HX, se obtiene haciendo uso de su equilibrio:

HX(aq) ⇄ H⁺(aq) + X⁻(aq)

Donde la constante de equilibrio, Ka, es

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Como los iones H⁺ y X⁻ vienen del mismo equilibrio podemos decir:

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Reemplazando es Ka:

1.65x10⁻⁸ = [H⁺] [H⁺] / [0.1732M]

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5.35x10⁻⁵M = [H⁺]

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<h3>pH = 4.27</h3>

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