How could you determine in a lab if a certain color is a chemical property of a substance, or if the color is caused by other factors?

The concentration equilibrium constant for the decomposition of ammonia at the final temperature of the mixture is approximately 0.12 (rounded to 2 significant digits).

To calculate the concentration equilibrium constant for the decomposition of ammonia, we can use the equation:

NH3(g) ⇌ N2(g) + 3H2(g)

From the question above,

Initial moles of NH3(g) = 22.0 mol

Moles of N2(g) at equilibrium = 8.8 mol

To find the moles of H2(g) at equilibrium, we can use stoichiometry:

From the balanced equation, we can see that 1 mole of NH3 decomposes to form 1 mole of N2 and 3 moles of H2.

Therefore, the moles of H2(g) at equilibrium would be 3 times the moles of N2(g):

Moles of H2(g) at equilibrium = 3 * 8.8 mol = 26.4 mol

Now, we can calculate the concentrations at equilibrium:

Concentration of NH3(g) = 22.0 mol / 50.0 L = 0.44 M

Concentration of N2(g) = 8.8 mol / 50.0 L = 0.176 M

Concentration of H2(g) = 26.4 mol / 50.0 L = 0.528 M

The equilibrium constant expression for the reaction is: Kc = [N2][H2]^3 / [NH3]

Substituting the given values, we get: Kc = (0.176)(0.528)^3 / (0.44)

Calculating this expression, we find: Kc ≈ 0.115 Therefore, the concentration equilibrium constant for the decomposition of ammonia at the final temperature of the mixture is approximately 0.12 (rounded to 2 significant digits).

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The value for k if the equilibrium pressures for hydrogen, oxygen, and water are 1, 0.5, and 1 atm, respectively are mentioned below.

What is equilibrium ?

A condition of balance can be either static (as in the case of a body acting on by forces whose resultant is zero) or dynamic (as in the case of a reversible chemical reaction when the velocities in both directions are equal). This equilibrium can be either intellectual or emotional.

What is pressure?

The pressure is nothing but the vital force applied to the object or particle. Pressure calculates how much force will be gone or extended to the object. Pressure is the force that is perpendicular to the power of extension. The standard unit of pressure is the pascal (pa).The formula for pressure, p= F/ Ap= pressure, F= magnitude, A= area of the surface pressure is the scalar quantity. Pressure is also expressed in the term atmospheric pressure, atm.

2H₂(g)+ O₂(g)⇒ 2H₂O(g)

As we know, formula for K is as follows:

Kp= (PH₂O)²/ (PH₂)²*PO₂

Here, we have

pH2O = 1 atm

pH2 = 1 atm

pO2 = 0.5 atm

Putting these values in the equation, we get

Kp = 2atm⁻¹

Now, we can convert it into Kc as follows:

Kp = Kc(RT)Δn

Where, change in moles of gases, ∆n = 2-3 = -1

Temperature, T = 25°C = 298 K

R = 0.082 atm•L/mol-K

So,

Kp = Kc(RT)Δn

2= Kc (0.082* 298)⁻¹

2= Kc*0.041

Kc= 0.041/2

Kc= 48.87

Therefore, the value for k if the equilibrium pressures for hydrogen, oxygen, and water are 1, 0.5, and 1 atm, respectively are mentioned above.

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Answer:3,4,1,2

Explanation:

hope this helped

Answer:

Weigh the empty crucible, and then weigh into it between 2 g and 3 g of hydrated copper(II) sulphate. Record all weighings accurate to the nearest 0.01 g.

Support the crucible securely in the pipe-clay triangle on the tripod over the Bunsen burner.

Heat the crucible and contents, gently at first, over a medium Bunsen flame, so that the water of crystallisation is driven off steadily. The blue colour of the hydrated compound should gradually fade to the greyish-white of anhydrous copper(II) sulfate. Avoid over-heating, which may cause further decomposition, and stop heating immediately if the colour starts to blacken. If over-heated, toxic or corrosive fumes may be evolved. A total heating time of about 10 minutes should be enough.

Allow the crucible and contents to cool. The tongs may be used to move the hot crucible from the hot pipe-clay triangle onto the heat resistant mat where it should cool more rapidly.

Re-weigh the crucible and contents once cold.

Calculation:

Calculate the molar masses of H2O and CuSO4 (Relative atomic masses: H=1, O=16, S=32, Cu=64)

Calculate the mass of water driven off, and the mass of anhydrous copper(II) sulfate formed in your experiment

Calculate the number of moles of anhydrous copper(II) sulfate formed

Calculate the number of moles of water driven off

Calculate how many moles of water would have been driven off if 1 mole of anhydrous copper(II) sulfate had been formed

Write down the formula for hydrated copper(II) sulfate.

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Explanation:

To react with Ethane, we need 84 moles of oxygen are required.

The reaction is depicted as follows:

2C₂H₆ + 7O₂ → 4CO₂ + 6H₂O

According to the reaction, the mole ratio of ethane (C₂H₆) to oxygen (O₂) is 2:7.

We have to find the moles of oxygen.

Given that 24 moles of ethane.

24 x 7/2

= 84

As a result, it takes 84 moles of oxygen to react with 24 moles of ethane.

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Answer:

store water so b

Explanation:

labeled Z in the model refers to store food and other material in the cell.

cell can be defined as the basic unit of the living cell, it can be unicellular or multicellular. unicellular organism are prokaryote and some of the unicellular eukaryotes whereas multicellular organisms are eukaryotes like plants and animals.

a basic component of cell are cell membrane, cytoplasm, nucleus, mitochondria, lysosome, golgi body, endoplasmic reticulum.

cell wall only present in plant cell and prokaryotic cell while it is absent in animal cell, the function of cell wall is to provide protection

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The atomic radius of elements increases down a group. Hence, the atomic radius of 13th group elements can be arranged in the increasing order as B, Al, Ga, In, Tl and Nh.

Atomic radius of an atom is the distance from its nucleus to the valence shell. Atomic radius vary from element to element. Along a period in periodic table atomic radius decreases.

Down a group in periodic table, the atomic radius increases, Down a group, the number of electrons as well the number of energy levels or shells increases, results in an increases in distance from the nucleus.

The 13th group elements are B, Al, Ga, In, Tl and Nh, the order of these elements is as written here down a group. Hence, increasing order of atomic radius is the same.

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Answer:

The answer is A

Explanation:

I took the test

Student A presented a reasonable analogy by providing the example of a tug of war between seven middle school students and a high school student.

An analogy exists as a cognitive operation of transferring data or meaning from a particular subject to another. It is a similitude of function and a superficial resemblance of structures that have distinct origins. For example, the wings of a fly, a moth, and a bird exist analogous because they evolved independently as transformations to a common function—flying.

Therefore, (A) option is the correct answer.

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Answer:

Open cluster

Explanation:

Why should I explain?

Answer: D open cluster

Explanation:

In Class I atmospheres containing butadiene, you may use explosion-proof equipment, as long as all conduit runs into the explosion-proof equipment have explosion-proof seals installed within 450 millimeters (18 inches) of the enclosure. This ensures safety and compliance with regulations in potentially hazardous environments.

Class I atmospheres are locations where flammable gases or vapors are present in the air in sufficient quantities to produce explosive or ignitable mixtures. Butadiene is one such flammable gas that is commonly used in the production of synthetic rubber and other chemical processes.

The statement implies that electrical equipment can be used in such environments, but certain precautions need to be taken to prevent explosions. All conduit runs, which are enclosed pathways for electrical wiring, must terminate in explosion-proof equipment. This means that the equipment used must be designed to contain any potential explosion and prevent it from spreading outside the enclosure.

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Answer:

(d) Carbon

Explanation:

Only 7 elements exists as a diatomic molecule. Hydrogen, Oxygen, Nitrogen, Fluorine, Chlorine, Bromine, and Iodine, which can be remembered as HONCLBRIF or HONFCLBRI

Answer:

its b alkyne

Explanation:

brinliest po plsss

Answer:

Alkyne so its b

Answer :Phosphorus P 32.6138

Oxygen O 67.3862

Explanation: Phosphorus P 32.6138

Oxygen O 67.3862

Answer:

Wind depositing sand to build up sand dunes.

Explanation:

Answer:

23

Explanation:

there are 23 pairs of chromosomes

46 individula chromosomes

but each parnet contribute one chromosome to each pair

Answer:

23 :)

Explanation:

The common name of the following compound CH₃CH₂OCH₃ is ethyl methyl ether.

Ethyl methyl ether, commonly known as ethyl methyl ether, is a colorless, flammable gas with a mild odor. It is an ether composed of two carbon atoms in a row (ethane), an oxygen atom connected to one of them, and a methyl (CH₃) group linked to the other.

The chemical formula for ethyl methyl ether is CH₃CH₂OCH₃. The IUPAC name for ethyl methyl ether is ethoxyethane, but it is more often referred to by its common name. It is used in a variety of industrial and laboratory applications, such as as a solvent for cellulose, resins, and oils, as well as a refrigerant and a local anesthetic.

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Answer:

Octet rule is applicable only for main group elements.

The octet rule is obeyed by all the elements in all groups of the periodic table.

The octet rule states that atoms must have a total of eight electrons around their outermost shell. This is why the noble gases are the most stable elements in the periodic table.

The octet rule is a general rule. As a result, this octet rule is obeyed by all the elements in all groups of the periodic table.

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Answer:

0.5 N

Explanation:

The ball pushes back with the same force as Alice applies to it

Answer:

0.5 Newtons

Explanation:

did it on edge and got it right

This problem is providing information about the equilibrium reaction whereby nitrogen dioxide gas produced dinitrogen tetroxide gas as shown on the attached picture and the following chemical equation:

NO₂ (g)  ⇄ N₂O₄ (g)

In such a way, we can consider the given choices to reason the following:  the blue arrow is pointing out the arrival to the equilibrium condition for the reaction, a point in which the rate of the forward reaction (formation of N₂O₄) is equal to the rate of the reverse reaction (formation of NO₂), because the molecules will fluctuate to the same relative amounts defined by the equilibrium constant.

Therefore the answer will be the first one on the attached file, which can vary on your online homework format.

It is important to note that the reactant is not used up at any point of the graph (concentration drops to 0) and also, the activation energy cannot be analyzed with this sparse information.

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Answer:

C. Calorimeter

Explanation:

Pipette transfers liquid, a hot plate heats things up like a stovetop, and a tripple-beam balance is a scale.

Answer:

It is a Calorimeter. 100%

The formation of a primary alcohol from a ketone involves the use of a ketone and NaBH4 followed by an acid workup.

The question is unclear but clearly relates to the formation of a primary alcohol. The first step in this reaction is the attack of the NaBH4 on the carbonyl carbon of butanone.

The reaction sequence is completed by an acid work up in which an acidic hydrogen is abstracted by the nucleophile to yield a primary alcohol.

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answer:

the reason is to ensure more solute is dissolving as it cools down. it is important to do it slowly because water will be sucked into buchner flask by a partial vaccum through the rubber tubing and be able to arrange molecules.

Incomplete question but using assumed values, the volume of m potassium dichromate solution that contains potassium dichromate is 9.1L

To calculate the volume of solution, we use the equation for molarity of solution:

Molarity of solution = mass of solute/molar mass of solute*volume of solution (in liter)

Where assumed values are:

Molarity of solution = 0.15 M

Given mass of potassium dichromate = 400. g

Molar mass of potassium dichromate = 294.15 g/mol

Volume solution in liter = x

i.e.

0.15 = 400/294.15*x

Volume of solution in liter = 400/294.15*0.15

Volume of solution in liter = 400/44.12

Volume of solution in liter = 9.06

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Answer:

it would have caused organisms to move in search of food and better conditions.

Answer:a

Explanation:

Answer:

0,783 mile/h

Explanation:

First you convert the dm/s into mile/s:

3,5 dm/s = 35 cm/s, beacause 1 dm = 10 cm, so you calculate 3.5 times 10

→ 3,5 * 10 = 35

35 cm/s = 13,78 in/s, because 1 in = 2,54 cm, so you calculate 35 divided by 2,54 → 35 : 2,45 = 13,78

13,78 in/s = 1,15 ft/s, because 1 ft = 12 in, so you calculate 13,78 divided by 12

→ 13,78 : 12 = 1,15

1,15 ft/s = 0,0002174 mile/s, becaus 1 mile = 5280 ft, so you calculate 1,15 divided by 5280 → 1,15 : 5280 = 0,0002174

Then you convert the mile/s into mile/h:

1 s = 1 / 3600 h

0,0002174 mile/s = 0,0002174 mile : 1/3600 h = 0,0002174 * 3600 mile/h

→ 0,783 mile/h

The chemical name of the aspirin is acetylsalicylic acid.                

It is a commonly used medication that belongs to a class of drugs called nonsteroidal anti-inflammatory drugs (NSAIDs). Aspirin is primarily used for pain relief, reducing inflammation, and reducing fever. It works by inhibiting the production of prostaglandins, which are involved in the body's inflammatory response.    

Aspirin is available over-the-counter in various doses and is used to treat a variety of conditions, including headache, menstrual cramps, arthritis, and cardiovascular disease. Aspirin works by inhibiting the production of prostaglandins, which are involved in the body's inflammatory response.

Aspirin is also used as a blood thinner to reduce the risk of blood clots that can lead to heart attack or stroke. However, it should be used with caution in some individuals, such as those with a history of stomach ulcers or bleeding disorders, and under the guidance of a healthcare provider.      

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Answer:

its 210

Explanation:

Just add all atomic mass used in the formula together: 2*(14+16*3)+88= 2*62+88=124+88=210

Hope this was helpful

The relative formula mass of strontium nitrate Sr(NO₃)₂ is 210

The relative atomic masses of N, O and Sr are 14,16 and 88 respectively.

In calculating the relative atomic mass of an element with isotopes, the relative mass and proportion of each is taken into account. Adding the atomic masses together gives the relative formula mass of a compound

So, relative atomic mass of Sr(NO₃)₂ is calculated as

88+ 2(14+16×3) = 210

The atomic mass constant (symbol: mu) is defined as being 1/12 th of the mass of a carbon-12 atom. Since both quantities in the ratio are masses, the resulting value is dimensionless; hence the value is said to be relative atomic mass.

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Answer:

Please find the answers to the frequency and energy to each question below

Explanation:

Using the formulas;

λ = v/f

E = hf

Where;

λ = wavelength (metres)

v = speed of light (2.998 × 10^8 m/s)

f = frequency (Hz)

E = Energy of photon (J)

h = Plancks constant (6.63 × 10^-34 J.s)

1.) λ = 568cm = 5.68m

f = v/λ

f = 2.998 × 10^8 ÷ 5.68

f = 0.5278 × 10^8

f = 5.278 × 10^7 Hz

E = hf

E = 6.63 × 10^-34 × 5.278 × 10^7

E = 34.99 × 10^(-34+7)

E = 3.499 × 10^-26 J

2). λ = 726cm = 7.26m

f = v/λ

f = 2.998 × 10^8 ÷ 7.26

f = 0.413 × 10^8

f = 4.13 × 10^7 Hz

E = hf

E = 6.63 × 10^-34 × 4.13 × 10^7

E = 27.38 × 10^(-34+7)

E = 2.74 × 10^-26 J

3). λ = 482cm = 4.82m

f = v/λ

f = 2.998 × 10^8 ÷ 4.82

f = 0.622 × 10^8

f = 6.22 × 10^7 Hz

E = hf

E = 6.63 × 10^-34 × 6.22 × 10^7

E = 41.24 × 10^(-34+7)

E = 4.124 × 10^-26 J

4). λ = 879cm = 8.79m

f = v/λ

f = 2.998 × 10^8 ÷ 8.79

f = 0.341 × 10^8

f = 3.41 × 10^7 Hz

E = hf

E = 6.63 × 10^-34 × 3.41 × 10^7

E = 22.61 × 10^(-34+7)

E = 2.26 × 10^-26 J

5). λ = 167cm = 1.67m

f = v/λ

f = 2.998 × 10^8 ÷ 1.67

f = 1.795 × 10^8

f = 1.795 × 10^8 Hz

E = hf

E = 6.63 × 10^-34 × 1.795 × 10^8

E = 11.9 × 10^(-34+8)

E = 1.19 × 10^-25 J

6). λ = 572cm = 5.72m

f = v/λ

f = 2.998 × 10^8 ÷ 5.72

f = 0.524 × 10^8

f = 5.24 × 10^7 Hz

E = hf

E = 6.63 × 10^-34 × 5.24 × 10^7

E = 34.74 × 10^(-34+7)

E = 3.474 × 10^-26 J