What causes a spectrum of colors to appear when light moves through a

prism?

Substance X - compound because it is a combination of elements

Substance Y - Mixture because it is a  combination of substances

Substances Z - Element because it contains atoms

Substance T -   compound because it is a combination of elements

We know that an atom is the smallest particle of a substance that can take part in a chemical reaction. A compound is formed by a mixture of atoms. An element is obtained as the smallest independent part of a substance.

Now let use classify the samples shown in the images attached.

Substance X - compound because it is a combination of elements

Substance Y - Mixture because it is a  combination of substances

Substances Z - Element because it contains atoms

Substance T -   compound because it is a combination of elements

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Answer:

u

Explanation:

a. For the first  response A B--> 2C, the value of ∆ H2 will be equal in magnitude but  contrary in sign to ∆ H1, because the rear  response.

2C--> A B, is just the original  response reversed. So, ∆ H2 = - ∆ H1.  

b. For the first  response A1/2 B--> C, the value of ∆ H2 will also be equal in magnitude but  contrary in sign to ∆ H1, because the rear  response, C--> A1/2 B, is just the original  response reversed. So, ∆ H2 = - ∆ H1.  

c. For the first  response A--> B 2C, the value of ∆ H2 will be equal in magnitude but  contrary in sign to ∆ H1/ 2, because the rear  response, 1/ 2B C-->1/2 A, is just the original  response reversed and halved. So, ∆ H2 = - ∆ H1/ 2.

For the first  general  response, A B--> 2C and 2C--> A B, the value of ∆ H2 will be equal in magnitude but  contrary in sign to ∆ H1, because the rear  response, 2C--> A B, is just the original  response reversed. So, ∆ H2 = - ∆ H1.   This means that the enthalpy change for the rear  response is equal in magnitude but  contrary in sign to the enthalpy change for the forward  response.  

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The process that is not a way for carbon dioxide to reach the atmosphere is Photosynthesis; option C

The carbon cycle is a biogeochemical cycle that describes the processes by which carbon is recycled between the living and non-living components of the environment.

The processes by which carbon is removed from the atmosphere and the processes by which carbon is returned to the atmosphere work together to ensure there is a balance of carbon in the environment.

The processes by which carbon is returned to the atmosphere in the form of carbon dioxide include the following:

The processes by which carbon is removed from the atmosphere include the following:

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Complete question:

Which of the following is not a way for carbon dioxide to reach the atmosphere?

a. forest fires

b. respiration

c. photosynthesis

d. burning of fossil fuels

Therefore, the percent by weight composition of the gas formed from the combination of one pound of sulfur and one pound of oxygen is 50% sulfur and 50% oxygen.

To determine the percent by weight composition of the gas formed when one pound of sulfur combines with one pound of oxygen, we need to calculate the individual weights of sulfur and oxygen in the compound.

The atomic weight of sulfur (S) is approximately 32.06 g/mol, and the atomic weight of oxygen (O) is approximately 16.00 g/mol.

Since both sulfur and oxygen combine in a 1:1 ratio, one pound of sulfur is equal to one mole of sulfur, and one pound of oxygen is equal to one mole of oxygen.

The total weight of the compound is the sum of the weights of sulfur and oxygen, which is:

Weight of sulfur + Weight of oxygen = 1 pound + 1 pound = 2 pounds

To find the percent by weight composition of the gas, we calculate the weight percentage of each element in the compound:

Weight percentage of sulfur = (Weight of sulfur / Total weight) × 100

Weight percentage of oxygen = (Weight of oxygen / Total weight) × 100

Substituting the values:

Weight percentage of sulfur = (1 pound / 2 pounds) × 100 = 50%

Weight percentage of oxygen = (1 pound / 2 pounds) × 100 = 50%

Therefore, the percent by weight composition of the gas formed from the combination of one pound of sulfur and one pound of oxygen is 50% sulfur and 50% oxygen.

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Answer:suffer 66.7 percent oxygen 33.3 percent

Explanation:

The atomic weight of sulfur (S) is approximately 32.06 g/mol, and the atomic weight of oxygen (O) is approximately 16.00 g/mol. Add them together to get the total weight of 48.06. Then calculate the percent of each. Suffer is 32.06 divided by 48.06 times 100 equals 66.7. Oxygen is 16 divided by 48.06 times 100 equal 33.3.

Answer:

\(0.75 \times 1000 = \)

Explanation:

Use ur calculator

Answer:

750m

Explanation:

1 km is equal to 1000m. Therefore all you have to do is multiply 0.75 by 1000 and you will get 750. Hope this helps! :)

How much energy is required to raise the temperature of 3 kg of aluminum from 18°C to 23°C? Use the table below and this equation: Q=mcΔT

Answer:

1.59x10⁻¹⁰m

Explanation:

To solve this question we must know that the length of the cubic cell, X, is equal to:

X = √8 * R

Where R is the atomic radius of germanium

And that in 1 unit cell there are 4 atoms of germanium.

To solve this question we must find the mass in 1 unit cell, with this mass we can find the volume of the cube and the length. With the length we can know the atomic radius:

Mass in 1 unit cell -Molar mass Ge = 72.64g/mol:

4 atoms Ge * (1mol / 6.022x10²³ atoms) = 6.64x10⁻²⁴ moles Ge

6.64x10⁻²⁴ moles Ge * (72.64g / mol) = 4.825x10⁻²²g Ge

Volume unit cell:

4.825x10⁻²²g Ge * (1cm³ / 5.32g) = 9.07x10⁻²³cm³

Length unit cell:

∛9.07x10⁻²³cm³ = 4.49x10⁻⁸cm * (1m / 100cm) = 4.49x10⁻¹⁰m

Atomic radius Ge:

4.49x10⁻¹⁰m / √8 =

Answer:

C?

Explanation:

I think it is C if not let me know i will help furthermore

Plz mark brainlyiest

Answer:

Explanation:

O2

The Ka value for trichloroacetic acid is 1.4 x 10^-1.

We can use the equation for the dissociation of a weak acid, HA, in water to find the Ka value:

HA + H2O ⇌ A- + H3O+

The Ka expression is:

Ka = [A-][H3O+] / [HA]

We know that the pH of the 0.050 M trichloroacetic acid solution is the same as the pH of the 0.040 M HClO4 solution, so we can write:

-pH = -log[H3O+] = -log(10^-pH) = -log(Ka*[HA]/[A-])

Using the given concentrations, we get:

-pH = -log(Ka*[0.050]/[0.950]) = -log(Ka*0.0526)

Similarly, for the HClO4 solution, we get:

-pH = -log(Ka*[0.040]/[0.960]) = -log(Ka*0.0417)

Since the two pH values are equal, we can set the two expressions for -pH equal to each other:

-log(Ka*0.0526) = -log(Ka*0.0417)

Simplifying, we get:

Ka = [A-][H3O+] / [HA] = 1.4 x 10^-1

Therefore, the Ka value for trichloroacetic acid is 1.4 x 10^-1.

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Answer:

i cant see the pic fully

Explanation:

Answer:

Increasing surface area/making particles smaller (like breaking a sugar cube into smaller pieces so that it covers more area), mixing , increasing temperature.

Answer:

They break down materials into smaller pieces

Explanation:

Although using different methods

Approximately 47.09 mL of 0.141 M KOH(aq) is needed to reach the equivalence point in the titration of 44.29 mL of 0.153 M C6H5OH(aq).

The balanced chemical equation for the reaction between KOH and C6H5OH is:

C6H5OH(aq) + KOH(aq) → C6H5OK(aq) + H2O(l)

From the balanced equation, we can see that the stoichiometric ratio between C6H5OH and KOH is 1:1.

First, we need to calculate the number of moles of C6H5OH in the given volume:

Moles of C6H5OH = Concentration of C6H5OH × Volume of C6H5OH = 0.153 M × 44.29 mL = 6.66 mmol

Since the stoichiometric ratio is 1:1, the number of moles of KOH required to react with C6H5OH is also 6.66 mmol.

Next, we can calculate the volume of 0.141 M KOH required to reach the equivalence point:

Volume of KOH = Moles of KOH / Concentration of KOH = 6.66 mmol / 0.141 M = 47.09 mL

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19) [Kr] 5s 4d05p³ is the electron configuration that is not valid and in which the configuration rule has been violated amongst all the options

In both the cases of atomic physics and quantum chemistry, this term electron configuration talks about the distribution of electrons of an atom or molecule in any atomic or molecular orbitals.

The formula for it is \(2n^2\), where n is the shell number. The tables below list the shells, n values, and the total number of electrons that can fit.

More than eight electrons can fit into the shell one inside the outermost shell in transition metals. Consider argon (Ar).

Its 18 electrons are arranged in a 2-8-8 pattern. Scandium (Sc) contains 21 electrons and is only 3 places away, however its configuration is 2-8-9-2.

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Answer:

0.225M

Explanation:

Equation: M=n/v

n = moles of solute

v = liters of solution

NaCl = 58.443 g/mol

16.88/58.443= 0.289 moles of NaCl

0.289/1.283=0.225M

Due to the variations in the sun-earth distance.

The catalyst is recovered unchanged in amount and chemical composition at the end of a reaction. It speeds up only a spontaneous reaction, not a spontaneous one. It is not consumed in a reaction. The correct option is B.

A substance which increases the rate of a reaction without itself undergoing any permanent change chemically or quantitatively is defined as the catalyst and the phenomenon is known as the catalysis. It is believed that a catalyst actually participates in the chemical reaction that it speeds up.

A catalyst does not affect the position of equilibrium of a reversible reaction and thus do not alter its equilibrium constant. This is because it speeds up the forward and backward reactions to the same extent. It shows some specificity in its action.

It does not alter the Gibbs energy.

Thus the correct option is B.

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Answer:

The element copper has naturally occurring isotopes with mass numbers of 63 and 65. The relative abundance and atomic masses are 69.2% for mass = 62.93 amu, and 30.8% for mass = 64.93 amu.

Answer: D

Explanation:

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Answer:

67.89

Explanation:it’s right

The percent composition of carbon in  compound of acrylonitrile is 22.646%.

Percent composition  is defined as a convenient way to record concentration of solution.It is a expression which relates mass of element  to mass of compound  as,mass of element/mass of compound×100.

Percent composition helps in elemental analysis of compound which is useful in analysis of ores also.  It helps in making solutions while performing the titrations.  It helps in prediction of chemical formula which can be predicted by mass and molar mass of an element.

The compound acrylonitrile  has a molar mass 53.06 g/mole and that of carbon is 12 g/mole thus, percent composition of carbon in  compound of acrylonitrile is 12/53.06×100=22.646%.

Thus, the percent composition of carbon in  compound of acrylonitrile is 22.646%.

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Answer:

Simple distillation is a method for separating the solvent from a solution.

Explanation:

For example, water can be separated from salt solution by simple distillation. This method works because water has a much lower boiling point than salt. When the solution is heated, the water evaporates.

Answer:

Stealing the last of your points on questions, it's been fun and I will most likely do it more in the future but for now this is the end. Thank you for the many points friend.

Explanation:

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The 4 principle, orbital, magnetic and spin quantum numbers of Thallium are:

Principal Quantum Number (n)

Orbital Quantum Number (l)

Magnetic Quantum Number (m)

Spin Quantum Number (s)

Valence electrοns are the electrοns that are present in the οutermοst shell οr energy level οf an atοm. These electrοns are invοlved in chemical bοnding and are respοnsible fοr the chemical prοperties οf an element. The number οf valence electrοns in an atοm determines its valency, which is the ability οf an atοm tο cοmbine with οther atοms tο fοrm cοmpοunds.

The fοur quantum numbers fοr Thallium can be determined frοm this electrοnic cοnfiguratiοn as fοllοws:

Principal Quantum Number (n):  This quantum number defines the energy level οr shell in which the electrοn is present. In the case οf Thallium, the valence electrοn is present in the fifth shell, therefοre the principal quantum number is 5.

Orbital Quantum Number (l):  This quantum number describes the subshell οr the type οf οrbital in which the electrοn is present. The values οf l depend οn the value οf n and range frοm 0 tο (n-1). In the case οf Thallium, the valence electrοn is present in the p subshell οf the fifth shell. Therefοre, the value οf l equates tο 1.

Magnetic Quantum Number (m): This quantum number describes the οrientatiοn οf the οrbital in three-dimensiοnal space. The values οf m range frοm -l tο +l. In the case οf Thallium, the p subshell has three οrbitals with m values οf -1, 0, and +1.

Spin Quantum Number (s): This quantum number describes the intrinsic angular mοmentum οr spin οf the electrοn. The value οf s is always ±½ fοr electrοns. Therefοre, the spin quantum number fοr the valence electrοn οf Thallium is ±½.

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The cathodic protection of Cu(s) can be provided if it is connected galvanically to Zn.

The metal with the more reduction potential will act as the anode and undergo oxidation, while the metal with the more positive standard reduction potential will act as the cathode and undergo reduction.

As Cu has a greater reduction potential than Zn, it has a greater capacity to reduce than that of Zn. So by galvanically connecting to zn, we can say that the cathodic protection of Cu can be obtained.

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Answer:

migraine

Explanation:

d

By the use of the Boyle's law as we can see in the solution below, the pressure is  51.5 units.

Boyle's law is a principle in physics that describes the relationship between the pressure and volume of a gas at a constant temperature.

It states that the pressure of a gas is inversely proportional to its volume, meaning that if the volume of a gas is decreased, the pressure will increase proportionally, and if the volume is increased, the pressure will decrease proportionally.

Using the Boyles law;

P1V1 = P2V2

P2 = P1V1/V2

P2 = 12.8 * 40.2/10

P2 = 51.5

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The major non-covalent interaction that dictates the interaction between chloromethane and water Hydrogen bonding .

The interaction known as hydrogen bonding, which involves a hydrogen atom sandwiched between two other atoms with a high affinity for electrons, is stronger than van der Waals forces but weaker than ionic or covalent bonds. Atoms in separate molecules or distinct regions of the same molecule can form hydrogen bonds with one another. A hydrogen atom (FH, NH, or OH) is covalently bound to one of the pair's (the donor) typically fluorine, nitrogen, or oxygen atoms, with which it shares electrons unevenly. As a result of this high electron affinity, the hydrogen gains a little positive charge.

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