Answer:

**Answer : The value of 'x' for this expression is, 5.59**

**Explanation :**

**The given expression is:**

Now we have to determine the value of 'x' by solving the above expression.

**Thus, the value of 'x' for this expression is, 5.59**

It is a vocal music of Mindoro

Write the equilibrium expression, calculate KEQ and then tell where the equilibrium lies: Fe (s) + O2 (g) ↔ Fe2O3 (s) In a 2.0 L Container At equilibrium: Fe = 1.0 mol O2 = 1.0 E-3 mol Fe2O3 = 2.0 mol

Why do organisms evolve?Organisms make changes to help them survive and reproduce in their environmentOrganisms with traits that help them survive and reproduce in their environment pass on those traits.Changes in the environment cause organisms to change.Organisms naturally select traits that help them survive and reproduce

A titration is carried out to determine the concentration of the acid in an old bottle of aqueous HCl whose label has become unreadable.What is the HCl concentration if 32.1mL of 0.250M NaOH is required to titrate a 30.0mL sample of the acid?

A primary amine contains a five-membered carbon ring. The degree of unsaturation for the five-membered carbon ring is equal to three. In the chemical formula, there are seven carbon atoms. Determine its chemical formula.

Write the equilibrium expression, calculate KEQ and then tell where the equilibrium lies: Fe (s) + O2 (g) ↔ Fe2O3 (s) In a 2.0 L Container At equilibrium: Fe = 1.0 mol O2 = 1.0 E-3 mol Fe2O3 = 2.0 mol

Why do organisms evolve?Organisms make changes to help them survive and reproduce in their environmentOrganisms with traits that help them survive and reproduce in their environment pass on those traits.Changes in the environment cause organisms to change.Organisms naturally select traits that help them survive and reproduce

A titration is carried out to determine the concentration of the acid in an old bottle of aqueous HCl whose label has become unreadable.What is the HCl concentration if 32.1mL of 0.250M NaOH is required to titrate a 30.0mL sample of the acid?

A primary amine contains a five-membered carbon ring. The degree of unsaturation for the five-membered carbon ring is equal to three. In the chemical formula, there are seven carbon atoms. Determine its chemical formula.

**Answer: The new concentration of the solution is 0.143 M.**

**Explanation:**

**Given:** = 300.0 mL, = 0.335 M

= 700.0 mL, = ?

**Formula used is as follows.**

Substitute values into the above formula as follows.

Thus, we can conclude that **the new concentration of the solution is 0.143 M.**

To find the new **concentration **of the solution, you can use the formula C1V1 = C2V2. Plugging in the given values, the new concentration of the solution is 0.144 M.

To find the new **concentration **of the solution, we can use the formula:

C1V1 = C2V2

Where C1 is the initial concentration, V1 is the initial volume, C2 is the final concentration, and V2 is the final volume.

Plugging in the given values, we get:

(0.335 M)(300.0 mL) = C2(700.0 mL)

Solving for **C2**, we find the new concentration of the solution to be 0.144 M.

**#SPJ11**

**Answer:**

a) ΔHºrxn = 116.3 kJ, ΔGºrxn = 82.8 kJ, ΔSºrxn = 0.113 kJ/K

b) At 753.55 ºC or higher

c )ΔG = 1.8 x 10⁴ J

K = 8.2 x 10⁻²

**Explanation:**

a) C6H5−CH2CH3 ⇒ C6H5−CH=CH2 + H₂

ΔHf kJ/mol -12.5 103.8 0

ΔGºf kJ/K 119.7 202.5 0

Sº J/mol 255 238 130.6*

Note: This value was not given in our question, but is necessary and can be found in standard handbooks.

Using Hess law to calculate ΔHºrxn we have

ΔHºrxn = ΔHfº C6H5−CH=CH2 + ΔHfº H₂ - ΔHºfC6H5−CH2CH3

ΔHºrxn = 103.8 kJ + 0 kJ - (-12.5 kJ)

ΔHºrxn = 116.3 kJ

Similarly,

ΔGrxn = ΔGºf C6H5−CH=CH2 + ΔGºfH₂ - ΔGºfC6H5CH2CH3

ΔGºrxn= 202.5 kJ + 0 kJ - 119.7 kJ = 82.8 kJ

ΔSºrxn = 238 J/mol + 130.6 J/mol -255 J/K = 113.6 J/K = 0.113 kJ/K

b) The temperature at which the reaction is spontaneous or feasible occurs when ΔG becomes negative and using

ΔGrxn = ΔHrxn -TΔS

we see that will happen when the term TΔS becomes greater than ΔHrxn since ΔS is positive , and so to sollve for T we will make ΔGrxn equal to zero and solve for T. Notice here we will make the assumption that ΔºHrxn and ΔSºrxn remain constant at the higher temperature and will equal the values previously calculated for them. Although this assumption is not entirely correct, it can be used.

0 = 116 kJ -T (0.113 kJ/K)

T = 1026.5 K = (1026.55 - 273 ) ºC = 753.55 ºC

c) Again we will use

ΔGrxn = ΔHrxn -TΔS

to calculate ΔGrxn with the assumption that ΔHº and ΔSºremain constant.

ΔG = 116.3 kJ - (600+273 K) x 0.113 kJ/K = 116.3 kJ - 873 K x 0.113 kJ/K

ΔG = 116.3 kJ - 98.6 kJ = 17.65 kJ = 1.8 x 10⁴ J ( Note the kJ are converted to J to necessary for the next part of the problem )

Now for solving for K, the equation to use is

ΔG = -RTlnK and solve for K

- ΔG / RT = lnK ∴ K = exp (- ΔG / RT)

K = exp ( - 1.8 x 10⁴ J /( 8.314 J/K x 873 K)) = 8.2 x 10⁻²

The change in enthalpy, entropy, and free energy were calculated for the **dehydrogenation **reaction of ethylbenzene into styrene. The reaction was found to be endothermic and results in a decrease in overall disorder. Under the given conditions, the reaction will never be spontaneous.

The processes involved in the production of styrene from **ethylbenzene **are fairly complex and require knowledge of thermodynamics. We'll begin with ΔH°rxn, which is found by subtracting the enthalpy (ΔH) of the reactants from that of the products: ΔH°rxn = [ΔH°f(styrene)] - [ΔH°f(ethylbenzene)] = 103.8 kJ/mol - (-12.5 kJ/mol) = 116.3 kJ/mol. This means the reaction is endothermic, as heat is absorbed.

The** change in entropy **ΔS°rxn, obtained likewise, is [S°(styrene) - S°(ethylbenzene)] = (238 J/mol·K - 255 J/mol·K) = -17 J/mol·K. This indicates a decrease in disorder in the system.

With these, we can calculate the change in free energy ΔG°rxn at a given temperature (T) using the equation ΔG°rxn = ΔH°rxn - TΔS°rxn. Substituting the known values at 298 K, ΔG°rxn = 116.3 kJ/mol - (298 K)(-17 J/mol·K) = 121.2 kJ/mol, indicating a **non-spontaneous reaction.**

For the reaction to be **spontaneous**, ΔG°rxn must be less than zero. Solving for T in the above equation with ΔG°rxn = 0, yields T = ΔH°rxn / ΔS°rxn = 116.3 kJ/mol / -17 J/mol·K ≈ -6840 K. This value is negative, implying the reaction is never spontaneous under the given conditions.

#SPJ12

**0.085 moles of Al** are required to form **23.6 g of AlBr₃**.

Let's consider the following **balanced equation** for the **synthesis reaction** of **AlBr₃**.

2 Al(s) + 3 Br₂(l) → 2 AlBr₃(s)

First, we will convert **23.6 g to moles** using the **molar mass **of **AlBr₃ **(**266.69 g/mol**).

The **molar ratio** of **Al to AlBr₃** is **2:2**. The **moles of Al** required to form **0.0885 moles of AlBr₃** are:

**0.085 moles of Al** are required to form **23.6 g of AlBr₃**.

You can learn more about **stoichiometry** here: brainly.com/question/22288091

Answer:

0.088 mole of Al.

Explanation:

First, we shall determine the number of mole in 23.6 g of AlBr₃.

This is illustrated below:

Mass of AlBr₃ = 23.6 g

Molar Mass of AlBr₃ = 27 + 3(80) = 267 g/mol

Mole of AlBr₃ =.?

Mole = mass/Molar mass

Mole of AlBr₃ = 23.6 / 267

Mole of AlBr₃ = 0.088 mol

Next, we shall writing the balanced equation for the reaction.

This is given below:

2Al(s) + 3Br₂(l) → 2AlBr₃(s)

From the balanced equation above,

2 moles of Al reacted with 3 mole of Br₂ to 2 moles AlBr₃.

Finally, we shall determine the number of mole of Al needed for the reaction as follow:

From the balanced equation above,

2 moles of Al reacted to 2 moles AlBr₃.

Therefore, 0.088 mole of Al will also react to produce 0.088 mole of AlBr₃.

**Intensive properties** are **physical properties** that do not depend on the amount or size of the material being measured. In other words, they remain constant regardless of the quantity of the substance.

The correct answer is b. **magnetism**.

Out of the options provided:

a. mass is an extensive **property** because it depends on the amount of the substance. If you have more of a substance, you will have a greater mass.

b. magnetism is an **intensive property** because it remains the same regardless of the size or amount of the material with the **magnetic property**.

c. shape is not a standard property used to classify intensive or extensive properties. It is more of a description of the object's form.

d. **volume** is an extensive property because it depends on the size and amount of the substance. If you have more of a substance, you will have a larger volume.

Learn more about **magnetism **from the link given below.

#SPJ6

**Answer:**

b. Magnetism (sorry im very late)

**Explanation:**

Intensive properties do not depend on size, no matter what it doesn't. For example, magnetism, density, melting and boiling points, and color. All of those support intensive property.

**Answer:**

**Mechanical to Heat**

**explanation:**

The wood itself can make mechanical energy but when it's on fire it makes heat energy

**Answer: Chemical to heat and light**

**Explanation: The energy transforms from chemical energy to heat and light energy. Because when the candle burns a chemical reaction occurs and produces heat and light.**

The **number** of gold atoms that would be needed to span this **distance **is 20,370.4 atoms.

To calculate how many **gold atoms** would need to be lined up to span a given distance, we will us the following method.

The **number** of gold atoms that would be needed to span this **distance**:

Distance = Diameter of a gold atom

Distance = 2 x Radius

Distance = 2 x 1.35 Å

Number of gold atoms = Total distance / Distance spanned by a single atom

Number of gold atoms = (5.5 x 10⁻⁴ cm) / (2 x 1.35 Å)

1 Å = 10⁻⁸ cm.

Number of gold atoms = (5.5 x 10⁻⁴ cm) / (2 x 1.35 x 10⁻⁸ cm)

Number of gold atoms = 20,370.4 atoms

Learn more about **number of atoms** here: brainly.com/question/6258301

#SPJ2

depends how many sig figs you are rounding to so I won't round to tenth or hundredth but the answer is 2.037 * 10^7