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AfilCa [17]
3 years ago
5

Escribe aquí algo que consideres que requiere un balance para que se lleve a cabo correctamente​

Chemistry
1 answer:
Solnce55 [7]3 years ago
8 0

Answer:

Algo importante sobre el balance de una reacción química es la ley de la conservación de la masa que establece que la masa no se crea ni se destruye sólo se transforma de modo que en una reacción química la suma de la masa de los reactivos debe ser igual a la suma de la masa de los productos.

Por ejemplo: La fermentación de la glucosa es una reacción química balanceada que da como resultado etanol y dióxido de carbono.

C₆H₁₂O₆ → 2C₂H₆O +2CO₂

Calculando la masa de los reactivos y productos, se debe cumplir la ley de la conservación de la masa:

C₆H₁₂O₆= 6*12+12*1+6*16=180 g/mol

C₂H₆O= 2*12+6*1+16=46 g/mol

CO₂=12+2*16=44 g/mol

C₆H₁₂O₆ → 2C₂H₆O + 2CO₂

180 g/mol = 2*46 g/mol + 2*44 g/mol

180 g/mol = 92 g/mol + 88 g/mol

180 g/mol = 180 g/mol

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Kinetic energy of an object can be expressed in terms of its mass m and velocity v as:

KE = 1/2 * m* v²

Thus higher the velocity, greater will be the Kinetic energy. Now, as the box moves along a ramp from top to bottom, its velocity increases and so does the KE. Hence, kinetic energy is maximum at the bottom

Ans B) at the bottom


8 0
3 years ago
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Kerosene, a common space-heater fuel, is a mixture of hydrocarbons whose "average" formula is C₁₂H₂₆.
padilas [110]

The calculated enthalpy of formation of kerosene is 365.4 kJ and heat produced is 78650.3 kJ

For this, we need the normal enthalpy of formation given below

ΔH∘f(CO2)=−393.5kJ/molΔH∘f(H2O)\s=−241.8kJ/molΔH∘f(O2)=0kJ/mol

We shall now determine the enthalpy of kerosene formation:

H rxn = 24 mol H f (CO2) + 26 mol H f (H2O) + 2 mol H f (C12H26) + 37 mol H f (O2) + 1.50 104 kJ = 9444 kJ + 6286.8 kJ + 1500 kJ 2 mol H f (C12H26) = 730.8 kJ H f (C12H26) = 365.4 kJ

Kerosene has a density of 0.74 g/mL.

Kerosene volume (V) equals 0.63 gallons, or 0.63 x 3785.4, or 2384. 8 mL.

We shall now calculate the mass (m) of kerosene:

ρ=mVm\s=ρ×Vm\s=0.749g/mL×2384.mLm\s=1786.2g

We shall now discover the heat that 1786 generated.

Two grams of kerosene

Kerosene's molar mass is 170.33 g/mol.

The mass of two moles of kerosene is equal to 2*170.33*340.66g.

1.50104kJ of heat are generated by 340.66 g of kerosene.

1786 produced heat.

Kerosene 2 grams = 1.50 104 kJ 340.66 1786.2 g = 78650.3 kJ

Learn more about enthalpy here-

brainly.com/question/13996238

#SPJ4

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1 year ago
Cómo se expresan las concentraciones en una solución?​
11Alexandr11 [23.1K]

yo no ablo espanol pero si ablo English

6 0
3 years ago
A car is traveling 70km in 45 minutes. How many miles an hour is the car traveling?
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52

Explanation:

70x45÷60= 52

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From where do the placenta and umbilical cord develop?
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It’s either the first or second one

I think it’s the first one - the outer cells of the blastocyst
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3 years ago
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