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boyakko [2]
2 years ago
9

100 points+Brainliest for correct answer

Chemistry
2 answers:
morpeh [17]2 years ago
6 0

Answer:

O Option 1

Explanation:

IF ENERGY IS RELEASED, THEN ENERGY RELEASED SHOULD BE SUBTRACTED FROM ORIGINAL.

(16.32 X 10^-19) - (5.4 X 10^-19)

10.92 X 10^-19

Zinaida [17]2 years ago
6 0
Poutine
Plus divide it up into a little too late and we should be fine too but it’s okay if I do that stuff uuuiiiiooooooo8888876
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1.00l of octane (M=114.23 g/mol, d=0.703 g/cm3) undergoes a combustion reaction with 5.0 L of oxygen at 25 celcius and 1.0 atm p
Natalka [10]

Answer:

               2.873 g of CO₂

Explanation:

This problem will be solved in two steps.

Step 1: Calculating mass of Octane:

Data Given:

                  Volume = 1 L = 1000 cm³

                  Density  =  0.703 g/cm³

                  Mass  =  ??

Formula Used:

                       Density = Mass ÷ Volume

Solving for Mass,

                       Mass  =  Density × Volume

                       Mass  =  0.703 g/cm³ × 1000 cm³

Putting Values,

                       Mass  =  703 g

Step 2: Calculating Mass of Oxygen:

Data:

                  Volume =  V  = 5.0 L

                  Temperature = T = 25 °C = 298.15 K

                  Pressure = P = 1.0 atm

                  Moles = n = ?

Assuming that the gas is acting as Ideal gas so, we will use Ideal gas equation i.e.

                 P V = n R T

Solving for n,

                  n = P V / RT

Putting values,

                  n = 1.0 atm × 5.0 L / 0.0821 atm.L.mol⁻¹.K⁻¹ × 298.15 K

                  n = 0.204 moles

As,

            Moles = Mass / M.Mass

So,

            Mass = Moles × M.Mass

            Mass = 0.204 mol × 16 g/mol       ∴ M.Mass of O₂ = 16g.mol⁻¹

            Mass = 3.26 g

Step 3: Calculating mass of CO₂:

The balance chemical equation is follow,

                            2 C₈H₁₈ + 25 O2 = 16 CO₂ + 18 H₂O

According to equation

        228.45 g (2 mol) of C₈H₁₈  reacts with = 799.97 g (16 mol) of O₂

So,

                       703 g of C₈H₁₈ will react with = X g of O₂

Solving for X,

                  X  =  703 g × 799.97 g ÷ 228.45

                  X  =  2461 g of O₂

While, we are only provided with 3.26 g of O₂. This means O₂ is the limiting reactant and will control the yield of the final product. Therefore,

According to balance equation,

          799.97 g (16 mol) of O₂ produced  =  704.152 g (16 mol) of CO₂

So,

   3.26 g (0.204 mol) of O₂ will produce  =  X g of CO₂

Solving for X,

                 X =  3.26 g × 704.152 g ÷ 799.97 g

                  X =  2.873 g of CO₂

6 0
3 years ago
El número de átomos de una molécula depende de la --- de los elementos ya que es la capacidad de la union de átomos ?
ss7ja [257]

Answer:

El número de átomos de una molécula depende de la "valencia" de los elementos, ya que es la capacidad de la unión de los átomos.

Explanation:

La valencia de un elemento se define como la medida de la capacidad de combinación de un elemento. Es la capacidad de combinación de un elemento con otros elementos para formar un compuesto químico o molécula.

Básicamente es el número de electrones de valencia que un elemento puede perder, ganar o compartir para formar enlaces químicos requeridos a partir de compuestos o moléculas.

¡¡¡Espero que esto ayude!!!

English Translation

The number of atoms of a molecule depends on the "valency" of the elements since it is the capacity of the union of atoms.

The valency of an element is defined as the measure of the combining ability of an element. It is the combining capacity of an element with other elements to form a chemical compound or molecule.

It is basically the number of valence electrons that an element can lose, gain or share in order to form chemical bonds required to from compounds or molecules.

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