Use the data in the table below to calculate the heat of vaporization (AHvap) in kJ/mol of pinene.
Vapor Pressure
(torr)
760
515
340
218
135


Temperature
(K)
429
415
401
387
373
kJ/mol
Use the value of AHyap determined in Part 1 to calculate the vapor pressure of pinene (in torr) at room temperature (23°C)
760
torr

Answer:

integumentary system

Explanation:

The integumentary system reduces water loss, contains receptors that respond to touch, regulates body temperature, and protects the inside of the body from damage. Receptors in skin send sensory information to the brain.

Answer:

Integumentary system

Explanation:

The integumentary system is the largest organ of the body, equaling 15-20% of our total body mass. It acts as a barrier to physical, chemical, and biological agents. The skin prevents water loss and regulates body temperature

Answer:

I can say that it is not a compound because I got it wrong

Explanation:

Answer:

Explanation:

I took the test

Answer:

B.

Converted to renewable ones

exhausted or depleted

Answer:

The proporties of both rubber and gum.

Explanation:

The compound is going to have the molecular formula; [tex]C_{4} H_{8}O_{2}[/tex]

We know that the molecular formula is the formula of the compound that shows the number of the atoms of each of the elements that we can be able to find in the compound.

Now for the compound that we have, we divide through by the relative atomic mass of each;

C - 54.53/12    H -  9.15/1   O - 36.32/16

C - 4.5        H - 9.15    O - 2.27

Dividing through by the lowest ratio;

C - 4.5/2.27   H - 9.15/2.27     O - 2.27/2.27

C - 2   H - 4    O -1

The empirical formula is [tex]C_{2} H_{4} O[/tex]

We now have;

[2(12) + 4(1) + 16] n= 88.1

n = 88.1/44

n = 2

The molecular formula is;

[tex]C_{4} H_{8}O_{2}[/tex]

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Answer:

[tex]A. \: \: CH _{3}CHO[/tex]

ethanal

This is because hydrogen is bonded with oxygen atom which is highly electronegative.

Answer:

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

[tex]n = \frac{N}{L} \\[/tex]

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

We have

[tex]n = \frac{1.8 \times {10}^{22} }{6.02 \times {10}^{23} } \\ = 0.02990...[/tex]

We have the final answer as

Hope this helps you

Answer:

D  The dinosaur could have died due to an meteor crash.

Explanation:

Answer:

D

Explanation:

The dinosaurs fossils were found ten miles away from the meteor crash site. Correct me if I'm wrong

pressure=585...

this is your answer

According to the question the new pressure of the gas is: 6.5512 kPa

What is pressure?

Pressure is the force applied to a surface divided by the area of the surface on which the force is applied. It is measured in units of force per unit area, such as pounds per square inch (psi) or pascals (Pa). Pressure can be caused by a variety of factors, such as the weight of air, the weight of a liquid, or the force of a gas. Pressure is an important concept in many fields, including physics, engineering, and chemistry.

The ideal gas law can be used to determine the gas's new pressure:

PV = nRT

where R is the universal gas constant, n is the number of moles, P is the pressure, V is the volume, and T is the temperature.

We know that V = 10.0L, n = 1.00 mole, R = 8.314 J/molK, and T = 800K.

As a result, the gas's new pressure is:

P = (1.00 mol * 8.314 J/molK * 800K) / 10.0L = 6.5512 kPa

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Answer:

[tex]{\huge\red{\fbox{{Faraday's 2nd Law of Electrolysis :-}}}}[/tex]

According to the second law of electrolysis, the same quantity of electricity will produce or dissolve chemically equivalent amounts of all the substances. This quantity of electricity is called Faraday (F). One Faraday is equal to 96487 coulombs per mole of electronic charges.

Answer:

Explanation:

273K

1ATM

Answer:

273 K 1 atm

Explanation:

Standard temperature and pressure (STP) is [273] K and [1] atm

Answer:

0.11

Explanation:

This equation is not balanced because there is an unequal amount of O's on both sides of the equation. The left hand side has 4 P's and the right hand side has 4 P's. So the P atoms are balanced. The left hand side has 2 O's and the right hand side has 10 O's.

To fix this unbalanced equation a 5 in front of the O2 on the left hand side is added to make 10 O's on both sides resulting in

P4 + 5O2 = 2P2O5

The equation is now balanced because there is an equal amount of substances on the left and the right hand side of the equation.

Answer:

Explanation:

Hello there!

In this case, since this concentration of hydronium ions is given, we infer we may calculate that of the hydroxide ions, pH and pOH because no question was specifically given. That is why we proceed as follows:

-  pH: Here, we use this concentration to calculate the pH according to the negative logarithm:

[tex]pH=-log(3.6x10^{-2})=1.44[/tex]

Which means that the solution is acidic as the pH is less than 7.

- pOH: since the pH added to the pOH is 14, we can calculate the latter as follows:

[tex]pOH=14-1.44=12.56[/tex]

- Hydroxide concentration: Given the pOH, we apply the antilogarithm to calculate such concentration as shown below:

[tex][OH^-]=10^{-pOH}=10^{12.56}=2.75x10^{-13}M[/tex]

Keep in mind, this is an arbitrary solution because no question was provided.

Regards!

The answer of the following question of concentration are:

c) The law expression for this reaction is k[A].

d) The value of k including its units is  on the specific reaction.

e) The half-life of the reaction is T1/2 = 0.693/k.

What is concentration?
Concentration in chemistry is a measure of the amount of a substance that is present in a given volume. It is usually expressed in terms of mass, moles, or volume.

c) The law expression for this reaction is rate = k[A], where k is the rate constant. This is because in a first-order reaction, the rate of reaction is proportional to the concentration of the reactant.

d) The value of k depends on the specific reaction, and can be determined by measuring the reaction rate at different concentrations of A and plotting a graph of rate versus concentration of A.

e) The half-life of a first-order reaction is given by T1/2 = 0.693/k, where T1/2 is the half-life and k is the rate constant. The units of the half-life are seconds.

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Answer:

Explanation:convection

Answer:

Hello your question has some missing data attached below is the missing data ( Note: the PH in the attached question is 3.2 but the PH value I used in the solution = 3.1 as requested in the initial question )

answer : 0.41 volts

Explanation:

Given data :

[ Fe²⁺ ] = 1.3 M

[ Fe³⁺ ] = 0.010 M

[ H⁺ ] = 10^3.1

O2 = 0.20 atm

E⁰cell = 0.46 volts

temperature = 25°C ( room temperature )

Calculate the voltage of this ( 3 -cell battery )

we can apply the relation below

E = E⁰cell - ( 0.0591 / n )*Log Q

  = 0.46 - ( 0.0591 / 4 )*Log [ (0.01)^4 / (1.3)^4 * (10^3.1)^4 * 0.2 ]

  = 0.4120 Volts

Note : Q is determined from the equation attached to the question

Answer:

okķkkkkkkkkkkkkkkkkkkkkk.I don't know the answer. GIVE THANKS

Magnesium is a metal that reacts quickly. The reaction with hydrochloric acid will result in the production of magnesium chloride and hydrogen gas.

Molecules, pressure, and temperature were necessary to determine the gas's volume. We only need to determine the moles of hydrogen because temperature and pressure have already been provided. As a result, 16.8 L of hydrogen were created at STP by dissolving 13.5 g of aluminum in sulfuric acid.

The chemistry is described below. According to the aforementioned reaction, 1 mole of magnesium and 2 moles of HCl are involved. The HCl moles are therefore 20.50mol=1mol 2 0.50 m o.

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Answer:

When a copper is drawn into wire the only change that occurs is change in its shape and size no change will take place into its composition that is the wires are still possessing the properties of copper metal. Thus, a physical change takes place when copper is drawn into wire.

Answer: D

Explanation:

d

The number of moles in 0.025 g of  (NH[tex]_4[/tex])[tex]_2[/tex]Cr[tex]_2[/tex]O[tex]_7[/tex] is 1.0 x 10⁻⁴moles. The word "mole" is shortened to "mol".

A mole is just a measuring scale. In reality, it's one of the International System for Units' seven foundation units (SI). When already-existing units are insufficient, new ones are created. The mole is indeed a SI unit that is used to quantify any quantity of a material. The word "mole" is shortened to "mol". Exact number of particles in one mole is 6.0221407610 23.

The levels at which chemical reactions frequently occur exclude the use of grams, yet utilizing actual numbers of atoms, molecules, or ions would also be unclear. To fill this gap between extremely small and extremely huge numbers, scientists created the mole.

number of mole of (NH[tex]_4[/tex])[tex]_2[/tex]Cr[tex]_2[/tex]O[tex]_7[/tex] = given mass / molar mass

                                                    =  0.025 / 252.07

                                                   =9.91 × 10⁻⁵moles

                                                   =  1.0 x 10⁻⁴moles

Therefore, the correct option is option D

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Answer:

2.5 mol/L

Explanation:

We'll begin by calculating the number of mole in 7 g of KOH. This can be obtained as follow:

Mass of KOH = 7 g

Molar mass of KOH = 39 + 16 + 1

= 56 g/mol

Mole of KOH =?

Mole = mass /molar mass

Mole of KOH = 7 / 56

Mole of KOH = 0.125 mole

Next, we shall convert 50 mL to L. This can be obtained as follow:

1000 mL = 1 L

Therefore,

50 mL = 50 mL × 1 L / 1000 mL

50 mL = 0.05 L

Finally, we shall determine the molarity of the KOH solution. This can be obtained as follow:

Mole of KOH = 0.125 mole

Volume = 0.05 L

Molarity of KOH =?

Molarity = mole / Volume

Molarity of KOH = 0.125 / 0.05

Molarity of KOH = 2.5 mol/L

Thus, the molarity of the KOH solution is 2.5 mol/L

The biotic factor of an aquarium ecosystem is algae growing on the glass.

The abiotic factors of an aquarium ecosystem are rock structure, temperature of the water, and amount of sunlight.

The example that describes an abiotic factor interacting with a biotic factor is the amount of sunlight affecting the growth of a plant.

All the listed items in Ms. Brown's class, including gravel, grass, butterfly, sunflower, bird feeder, and flowerpots, are a part of the garden ecosystem.

An ecosystem is a community of living organisms (biotic factors) interacting with each other and with their physical environment (abiotic factors) in a specific area. It includes all the living and non-living components of the environment that interact with each other. Examples of ecosystems include a coral reef, a forest, a desert, and even an aquarium or a garden. Ecosystems can be large or small and can be found on land or in water. They are essential for the survival of living organisms as they provide food, shelter, and other resources necessary for life.

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Answer:

B. It tells whether products or reactants are favored at equilibrium.

Answer: You can view more details on each measurement unit:

Explanation:

molecular weight of Hydrogen Fluoride or mol The molecular formula for Hydrogen Fluoride is HF. The SI base unit for amount of substance is the mole. 1 grams Hydrogen Fluoride is equal to 0.049984147027929 mole.

Answer:

Ok

The Limiting reagent is Aluminum. Its not in excess. So the reaction ends once its exhausted. So all Aluminum will be used up

From the question ....

157g of Al

Find the number if reacting Moles...

M=mass/molar mass

M= 157/27

=5.81moles of Aluminum is reacting.

Now looking at the equation of reaction(Always make sure its balanced)...

2moles of Al react to produce 2 Moles of AlCl3

Their Mole ratio is equal

Since their Mole ratio is equal 2:2.... That means... That 5.81moles of AlCl3 would be produced because the mole of Al is 5.81

So We now know the Moles of AlCL3 produced

getting the Mass won't be difficult.

Again

Mole=Mass/Mm

Mass = Mole x Mm(Molar Mass)

Mass of AlCl3 = 5.81 x (27 + 35.5x3)

Note: The arithmetic done in the parenthesis is the molar mass of AlCl3

Mass of AlCl3 = 5.81 x 133.5

=775.63g of AlCl3.

Have a great Day!!!!

Answer:  The statement 'At equilibrium, the rate of the forward reaction is the same as the rate of the reverse reaction' best describes general equilibrium.

Explanation:

A chemical process in which the rate of forward reaction is equal to the rate of backward reaction.

For example, [tex]A + B \rightleftharpoons C + D[/tex]

This reaction is an equilibrium process. Symbol which represents the equilibrium is '[tex]\rightleftharpoons[/tex]'.

Thus, we can conclude that the statement 'At equilibrium, the rate of the forward reaction is the same as the rate of the reverse reaction' best describes general equilibrium.

As the class is of 1 hour and  and each student uses for 6 minutes so in 1 hour 10 students will use the balance.

A scale or balance is a device used to measure weight or mass. These are also known as mass scales, weight scales, mass balances, and weight balances.

The traditional scale consists of two plates or bowls suspended at equal distances from a fulcrum. One plate holds an object of unknown mass (or weight), while known masses are added to the other plate until static equilibrium is achieved and the plates level off, which happens when the masses on the two plates are equal.

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