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2 years ago

Which expression correctly describes activation energy in a chemical reaction?

1 answer:

Rudiy272 years ago

3 0

An expression that correctly describes the activation energy in a chemical reaction is reactants and products in between the energy barrier. This expression describes the statement above because reactants or products wouldn't produce any reaction unless it will collide with a barrier. It is like the activation of energy where it is in need of a substance or barrier in order to form a chemical reaction.

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Johanna makes the table below to organize her notes about centripetal forces. Which type of force should she place in the cell m

Valentin [98]

Answer: The correct answer is Option 2.

Explanation:

Centripetal force is defined as the force that acts on a body moving in a circular path and is directed towards the center around which the body is moving.

Mathematically,

$F_c=\frac{mv^2}{r}$

Where,

$F_c$ = centripetal force

m = mass of the object

v = tangential velocity

r = radius of the path

From the above relation, X corresponds to the radius and Y corresponds to the tangential velocity.

Hence, the correct answer is option C.

3 0

3 years ago

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Classify the below solids as amorphous or crystalline. emerald glass MgCl, rubber

svet-max [94.6K]

Answer:

Here yo

Explanation:

6 0

2 years ago

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solubility of cu(oh)2 is 2.42 x 10-3 mol/l. calculate ksp and in which direction the reaction is spontaneous if δgº

Simora [160]

Ksp of copper(II) hydroxide Cu(OH)2 is 4.9 x 10-8.

Chemical reaction (dissociation) of copper(II) hydroxide in water:

Cu(OH)2(s) → Cu²⁺(aq) + 2OH⁻(aq).

Ksp(Cu(OH)2) = [Cu²⁺]·[OH⁻]².

[Cu²⁺] = 2.42 x 10-3 mol/l; solubility od copper ions

[OH⁻] = 2[Cu²⁺] = 2 x 2.42 x 10-3 mol/l

[OH⁻] = 4.48 x 10-3 mol/l; solubility of hydroxide ions

Ksp = 2.42 x 10-3 mol/l x (4.48 x 10-3 mol/l)²

Ksp = 4.9 x 10-8

Ksp is the solubility product constant for a solid substance dissolving in an aqueous solution.

Solubility of the compound depends on the temperature of the solution and the structure of that compound.

More info about: brainly.com/question/23946616

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7 0

1 year ago

Suppose you have been given the task of distilling a mixture of hexane + toluene. Pure hexane has a refractive index of 1.375 an

miv72 [106K]

Explanation:

The given data is as follows.

Refractive index of mixture = 1.456

Refractive index of hexane = 1.375

Refractive index of toulene = 1.497

Let mole fraction of hexane = $x_{1}$

and, mole fraction of toulene = $x_{2}$

Also, $x_{1} + x_{2} = 1$

or, $x_{1} = 1 - x_{2}$

Hence, calculate the mole fraction of hexane as follows.

refractive index mixture= mole fraction hexane × ref index hexane + mole fraction toluene × ref index toluene.

1.456 = $(1 - x_{2}) \times 1.375 + x_{2} \times 1.497$

1.456 = $1.375 - 1.375x_{2} + 1.497x_{2}$

0.081 = $0.122x_{2}$

$x_{2}$ = $\frac{0.081}{0.122}$

= 0.66

Since, $x_{1} = 1 - x_{2}$

= 1 - 0.66

= 0.34

Thus, we can conclude that mole fraction of hexane in your sample is 0.34.

3 0

3 years ago

Which of the following statements is correct about the gases which participate in photosynthesis?

Sidana [21]

If you look at the equation for photosynthesis, it is:
6CO2 + 6H2O + light energy ---> C6H12O6 + 6O2

Since CO2 (carbon dioxide) is on the left side of the equation, it is being consumed, or used up. Since O2 (oxygen) is on the right side, it is being produced.

The correct answer is the first one, "Carbon dioxide is used up, and oxygen is produced."

7 0

2 years ago

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