A hydrogen atom is excited to the n = 10 stated. It then decays to the n = 4 state by emitting a photon which is detected in a photographic plate. What is the frequency of the detected photon? The lowest level energy state of hydrogen is -13.6 eV. (h = 6.626 × 10-34 J ∙ s, 1 eV = 1.60 × 10-19 J)

Answer:

A

Explanation:

Answer:

A. Sorry if wrong, but if i'm right can you mark brailniest pls?

The independent variable here is the distance water traveled out of the carton.

The factors of the subject or the things that have an impact on the experiment are known as the variables of an experiment. Three different sorts of variables exist. These variables are control, independent, and dependent.

Independent variables are ones that are not under the experimenter's direct control. The experimenter can alter or regulate the dependent variables. Control variables are those that don't change or are constrained during the experiment.

The carbon's journey distance is the dependent variable in this situation when Mario studied how far room temperature water would spurt out of a plastic milk carton when 3mm holes were punched at different heights from the bottom of the container.

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An example of an isotonic eccentric contraction is when a person lowers a weight during a bicep curl exercise.

Concentric and eccentric contractions are the two varieties of isotonic contractions. When a muscle shortens during a concentric contraction, its tension increases to meet the resistance and then stays constant. As the resistance rises above the force being generated by the muscle during eccentric contraction, the muscle lengthens.

During the lowering phase of a bicep curl exercise, the bicep muscle is contracting eccentrically as it controls the descent of the weight. The muscle is producing force, but the weight is greater than the force produced, causing the muscle to lengthen. This is an example of an isotonic eccentric contraction.

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The amount of heat energy required to melt the 182 g of ice at -18 ˚C to liquid water at temperature of 25 ˚C is 86475.48 J

To obtain the heat energy required, do the following:

1. Obtain the heat required to change the ice from -18 ˚C to 0 °C. This is shown below:

Q₁ = MCΔT

Q₁ = 182 × 2.030 × 18

Q₁ = 6650.28 J

2. Obtain the heat required to melt the ice. This is shown below:

Q₂ = m × ΔHf

Q₂ = 182 × 334

Q₂ = 60788 J

3. Obtain the heat required to change the water from 0 °C to 25 °C. This is shown below:

Q₃ = MCΔT

Q₃ = 182 × 4.184 × 25

Q₃ = 19037.2 J

4.  Combine the heat energies obtained above to obtain the heat required to melt the ice from -18 ˚C to water at 25 ˚C. This is shown below:

Q = Q₁ + Q₂ + Q₃

Q = 6650.28 + 60788 + 19037.2

Total heat energy required = 86475.48 J

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To conduct the experiment that calls for 4 moles of C6H5Cl, we would need to weigh out 450.24 grams of C6H5Cl.

To calculate the grams of C6H5Cl needed for the experiment, we need to use the molar mass of C6H5Cl. The molar mass of C6H5Cl can be calculated by adding up the atomic masses of the atoms in the molecule. The atomic mass of carbon is 12.01 g/mol, hydrogen is 1.01 g/mol, and chlorine is 35.45 g/mol. So, the molar mass of C6H5Cl is:
(6 x 12.01) + (5 x 1.01) + 35.45 = 112.56 g/mol
Now, we can use the formula:
grams = moles x molar mass
To find the grams of C6H5Cl needed, we can plug in the values:
grams = 4 moles x 112.56 g/mol = 450.24 grams
It is important to use the correct amount of the chemical in an experiment to ensure accurate and reliable results.

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Answer: lucky fluoride

Explanation:

Explanation:

let's have a look at bohrs postulates to answer the question, (bohrs model was applicable only for hydrogen like species)

Now coming to your question,

Electrons can only orbit the nucleus in a fixed circular orbit.

Electrons prefer fo orbit in the shell which are close to nucleus or having less energy.

Each shell can only hold a specific number of electrons given by formula 2n² where n is the number of shell,

the 1st shell can hold 2n² = 2×1² = 2 electrons

the 2nd shell can hold 2×2² = 8 electrons

the 3rd shell can hold 2×3² = 18 electrons

An atom can gain or lose electrons to form an ion.

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275K is the kelvin temperature of the gas

What does the word "temperature" mean?

Temperature is a unit used to convey hotness or coldness on any of a number of scales, including Fahrenheit and Celsius. According to temperature, heat energy will naturally move from a hotter (body with a higher temperature) to a colder (body with a lower temperature) (one at a lower temperature).

Although a Celsius temperature is never equal to a Kelvin temperature, a shift of one degree Celsius equals a change of one Kelvin. On the Kelvin scale, there are no negative temps. Subtract 273.15 from the Kelvin temperature to get the Fahrenheit equivalent.

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On the basis of arrangement of atoms, the matter is classified into three states: solid, liquid and gas.

In Chemistry, there are three fundamental states of matter based on the arrangement of molecules and atoms inside it.

Generally, solids have strict and rigid arrangement of atoms as they posses strong intermolecular forces and have high melting and boiling points. solids have fixed composition of atoms.

Similarly, liquids have loose arrangement of atoms and molecules keep moving randomly in a liquid. Liquids have low melting and boiling points as compared to solids. Gases have weakest intermolecular forces and atoms are arranged randomly in them. Also, their molecules keep moving in all directions.

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Answer:

Transmission means light waves bending when it enters a different medium

Explanation:

69 mmHg pressure is exerted by oxygen if 40% of the gas pressure is exerted by the oxygen gas.

Pressure is defined to be the amount of force exerted per area

40% of pressure is exerted by oxygen gas.

So, 60% of pressure will be exerted by carbon dioxide gas.

60% of 115 mmHg = 69 mmHg

Hence, 69 mmHg pressure is exerted by oxygen if 40% of the gas pressure is exerted by the oxygen gas.

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Explanation:

While CO2 can be distilled from the air, that method is expensive and inefficient. Therefore, it is usually captured from other sources where it is a waste material. This could be anything from brewing beer to burning fossil fuels. However, the most efficient way of producing carbon dioxide is from ammonia.

Answer:

The answer is SiO2

Explanation:

Because nonmetals are those who gain electrons and form ve ions

Answer:

Atomic Number = 3.

Explanation:

The number of protons determines the atomic number. Basically the number of protons is the exact same as the atomic number.

Protons 3 = Atomic number 3

Given data: The present atmospheric concentration of CO2 is 400ppm and the mass of C in the atmosphere is 848 Gt. Carbon emissions are expected to grow exponentially from 5.5 Gt/yr to 21.4Gt/yr over the next 100 years.

To find: The atmospheric concentration of CO2 in 100 years Solution:

Step 1: Calculate the concentration of carbon in the atmosphere at present In 848 Gt of carbon, the number of moles = mass / molar mass

Molar mass of carbon = 12 g/mol

Number of moles = 848 x 10^9 / 12 = 70.67 x 10^9The volume of the atmosphere = 4/3πr^3 = 4/3 x π x (6.37 x 10^6 m)^3 = 1.086 x 10^19 m^3Concentration of carbon in the atmosphere = 70.67 x 10^9 / 1.086 x 10^19= 6.5 ppm

Step 2: Calculate the concentration of carbon in the atmosphere after 100 years

Total amount of carbon released in 100 years = ∫5.5 to 21.4 Gt/yr dt = 1103 Gt Carbon mass in 100 years = 848 + 1103 = 1951 Gt

The number of moles of carbon = 1951 x 10^9 / 12 = 162.6 x 10^9The volume of the atmosphere = 1.086 x 10^19 m^3Concentration of carbon in the atmosphere after 100 years= 162.6 x 10^9 / 1.086 x 10^19= 15 ppm

The concentration of carbon dioxide in the atmosphere is twice the concentration of carbon in the atmosphere.

So, the concentration of carbon dioxide in the atmosphere after 100 years = 2 x 15 = 30 ppm.

The atmospheric concentration of CO2 in 100 years would be 400 + 30 = 430 ppm.

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The two ions present in the solution are:

1. Sodium ion, Na⁺

2. Hydroxide ion, OH¯

The correct answer to the question is the 3rd option. The sodium ion is positive, and the hydroxide ion is negative.

Ions are atoms or group of atoms which possess an electric charge.

Aqueous Sodium hydroxide, NaOH contains sodium ion and hydroxide ion.

The sodium ion is positive while the hydroxide ion is negative as illustrated below:

NaOH(aq) —> Na⁺(aq) + OH¯(aq)

From the illustration above, we can conclude that the correct answer to the question is the 3rd option. The sodium ion is positive, and the hydroxide ion is negative.

Please see attached photo for further details

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Answer:

\(V_2=36.84L\)

Explanation:

Hola,

En este caso, podemos usar la ley de Boyle, la cual nos permite analizar el comportamiento volumen-presión en un gas ideal de manera inversamente propocional:

\(P_1V_1=P_2V_2\)

Así, dado el volumen y la presión inicial, la cual se convierte a atmósferas (760 torr = 1atm), calculamos el volumen final a 1 atm como se muestra a continuación:

\(V_2=\frac{P_1V_1}{P_2}=\frac{700torr*\frac{1atm}{760torr}*40l }{1atm}\\ \\V_2=36.84L\)

Saludos!

Answer:

\(V_2=~36.84~Litros\)

Explanation:

En este caso tenemos diferentes valores de volumen y presión para un primer estado:

\(V_1=~40~Litros\)

\(P_1=~700~torr\)

Y tenemos valores de presión para un segundo estado:

\(V_2=~?\)

\(P_2=~1~atm\)

Necesitamos una relación entre volumen y presión para poder hallar nuestra incognita ( \(V_2\)). Nuestra relación es la ley de Boyle:

\(P_1*V_1=P_2*V_2\)

Ahora bien, tenemos una unidad diferente para el presión en \(P_2\) (atm), debemos hacer una conversión. Esta conversión puede hacerse si sabemos que 1 atm = 760 torr por lo cual \(P_2=760~torr\)

Ahora podemos reemplazar en la ecuación:

\(700~torr*40~Litros=760~torr*V_2\)

\(V_2=\frac{700~torr*40~Litros}{760~torr}\)

\(V_2=~36.84~Litros\)

El volumen sera de 36.84 Litros

Espero que ayude!

When atoms or molecules absorb energy, it is often released as light energy

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The statement the phalanges help hold the brain in the skull is false because the phalanges are the bones found in the fingers and toes and are not involved in holding the brain in the skull.

What are phalanges?

The phalanges, also known as the finger and toe bones, have no direct connection or role in supporting or holding the brain within the skull. The skull, comprised of various bones such as the cranium, provides protection and structural support for the brain.

The brain itself is housed within the cranial cavity, which is formed by the surrounding bones of the skull. The role of the phalanges is primarily related to the movement and functionality of the hands and feet. They are responsible for providing dexterity, flexibility, and support for grasping objects and locomotion.

Therefore, while the phalanges play an important role in hand and foot function, they have no direct involvement in holding the brain in the skull.

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the ∆g° of vaporization for 2-methylbutane at 1.00 atm and 235 K is 5.35 kj/mol.

To find the ∆g° of vaporization for 2-methylbutane, we can use the formula:
∆g° = ∆h° - T∆s°
Where ∆h° is the enthalpy of vaporization (25.22 kj/mol), ∆s° is the entropy of vaporization (84.48 j/mol･k), and T is the temperature in kelvin (235 K).
First, we need to convert the units of ∆s° from j/mol･k to kj/mol･k by dividing by 1000:
∆s° = 84.48 j/mol･k ÷ 1000 = 0.08448 kj/mol･k
Next, we can plug in the values into the formula and solve for ∆g°:
∆g° = 25.22 kj/mol - (235 K)(0.08448 kj/mol･k)
∆g° = 25.22 kj/mol - 19.87 kj/mol
∆g° = 5.35 kj/mol
Therefore, the ∆g° of vaporization for 2-methylbutane at 1.00 atm and 235 K is 5.35 kj/mol.

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Answer:

linear angleee

Explanation:

lol i dont know what to put here

Answer:

B) Bent

There are a lot of types of bents but this one is linear bent.

Absorbance of the sample is found to be 0.269

Absorbance = 2 - (log%T)

A = 2 - 1.731

= 0.269

The amount of light absorbed by a solution is measured by its absorbance (A), often referred to as optical density (OD). In spectrophotometry, absorbance and transmittance percentage are often used.

Different materials allow light to pass through them to differing degrees of success. Transparent materials permit the passage of light. Although translucent materials allow some light to pass through, you cannot see much of what is on the other side. Materials that are opaque block the flow of light. Transmittance, which compares the quantity of light energy that goes through a material to the amount of light energy that enters the medium, is typically expressed as a percentage. In contrast to completely opaque materials, which transmit 0% of light, absolutely transparent materials transmit 100% of light. Light may pass through a variety of colours of materials.

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Answer:

I believe is the npp i kinda forgot how to do these lol

Diagram with npp type shows an atom that is not a form of hydrogen.

An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether solid,liquid , gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.

The protons are positively charged and neutrons are neutral and hence the nucleus is positively charged. The electrons which revolve around the nucleus are negatively charged and hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.

Atoms of the same element are similar as they have number of sub- atomic particles which on combination do not alter the chemical properties of the substances.

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Answer:

Are barium and chlorine a metal and nonmetal?

Explanation:

I had the same question, and my class reviewed the test and this was the answer to this question.

Answer:

+1

Explanation:

An atom is considered to be neutral before losing or gaining any electrons. They are neutral in charge because they initially have the same number of protons (with charge of +1 each) and electrons (with a charge of -1 each).

Consider charge in an electron like a balance, with positively charged protons on one side and negatively charged electrons on the other. When you have the same number of each, there is equal amounts of positive and negative charge so the atom is neutral with a charge of zero.

For example, potassium has 19 protons, and 19 electrons. This means it has  19 positive charges and 19 negative charges. If you take away one electron, it now has 19 positive charges and 18 negative charges. So there is one more positive charge than negative, which means it is now an ion (a charged atom) with a charge of +1.

The model shown should demonstrate why planets do not end up going into the sun as follows: The planets move too fast to go into the sun. (option A).

Planets are the bodies that orbit round the sun. The planets are seven in number as follows:

According to this question, a student looks at an animated model of the planets orbiting the sun. In reality, this planets do not go into the sun because they are far away from the sun.

The Earth as a planet for example is not moving fast enough to escape the sun's gravity and leave the solar system, but it is going too fast to be pulled into the sun. Therefore, it keeps going around and around in an orbital manner.

Therefore, the model shown should demonstrate why planets do not end up going into the sun as follows: The planets move too fast to go into the sun.

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To calculate the percent composition by mass of carbon in \(C_6H_{100}\), we need to determine the molar mass of carbon in the compound and divide it by the molar mass of the entire compound.

The balanced equation given indicates that for every 1 mole of \(C_6H_{100}\) burned, 6 moles of \(CO_2\) are produced. Using the molar masses of carbon and  \(C_6H_{100}\) , we can calculate the percent composition by mass of carbon.

The molar mass of carbon (C) is 12.01 g/mol. The molar mass of  \(C_6H_{100}\) can be calculated as follows:

(6 × 12.01 g/mol) + (1 × 1.01 g/mol) + (10 × 16.00 g/mol) = 162.10 g/mol.

To determine the percent composition by mass of carbon in  \(C_6H_{100}\) , we need to find the mass of carbon in 1 mole of  \(C_6H_{100}\) . Since there are 6 carbon atoms in the compound, the mass of carbon is:

(6 × 12.01 g/mol) = 72.06 g.

Now we can calculate the percent composition by mass of carbon:

(72.06 g / 162.10 g) × 100% ≈ 44.5%.

Therefore, the percent composition by mass of carbon in  \(C_6H_{100}\) is approximately 44.5%.

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