Determine the empirical formula of each of the following compounds if a sample contains 5.28 g Sn and 3.37 g F.

Answer:

The sun's position near earth

Explanation:

Answer:

C. either A or B

Explanation:

To calculate the energy of a photon returning to its ground state, we required either the frequency or the wavelength. Often times, not both.

The wavelength of a photon can be derived by;

     E = hf

 or

        E  = \(\frac{hc}{wavelength}\)  

 h is the Planck's constant

 c is the speed of light

 f is the frequency

Tthe initial temperature of the polystyrene sample is 39.4°C.

Given: Mass of polystyrene sample = 54.2 gSpecific heat of polystyrene = 1.880 J-g°CWater mass = 100.0 g Initial water temperature = 21.0°CWater final temperature = 34.3°CPressure remains constant at 1 atmFormula used:Heat gained by water = heat lost by polystyreneHence,Heat lost by polystyrene = Heat gained by water=> mcΔT = mcΔTwhere,m = mass of polystyrene or waterc = specific heat capacityΔT = change in temperatureThe temperature change is ΔT = 34.3°C - 21.0°C = 13.3°CNow we can use this temperature change to calculate the initial temperature of the polystyrene.Taking the water's specific heat capacity, c = 4.184 J/g°CHeat gained by water = (100.0 g)(4.184 J/g°C)(13.3°C) = 5574 JHeat lost by polystyrene = 5574 JTaking the polystyrene's specific heat capacity, c = 1.880 J/g° ) = 13.3°C Now let's calculate the mass of polystyrene using the specific heat capacity formula.5574 J = (54.2 g)(1.880 J/g°C)(13.3°C - Ti)Ti = 39.4°C

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Based on atomic properties and structure:

Isotopes are atoms of an element having the same atomic number but different mass numbers.

The difference in mass number is dues to different neutron numbers.

However, because they have the same proton number, they are atoms of the same element.

Neutral atoms contains equal number of protons and electrons.

An atom of barium has 56 protons and 56 neutrons in order to maintain electrical neutrality.

The mass number of an atom is determined by the sum of protons and neutrons.

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Marks that might link a bullet to a specific weapon include striations, which are unique patterns and imperfections left on the bullet's surface as it passes through the barrel of a firearm. As for the fingerprints found, it depends on the context of the investigation. Fingerprints can be categorized into three main types: latent, patent, and plastic.

Marks that might link a bullet to a specific weapon include striations, which are unique patterns and imperfections left on the bullet's surface as it passes through the barrel of a firearm. These striations are caused by the unique characteristics of the rifling inside the barrel, such as the number of lands and grooves, their width, depth, and the direction of twist. Comparing the striations on a recovered bullet to test-fired bullets from a suspected weapon can help determine if they match, indicating a potential link.

As for the fingerprints found, it depends on the context of the investigation. Fingerprints can be categorized into three main types: latent, patent, and plastic. Latent fingerprints are invisible and require development techniques such as powder or chemical methods to make them visible. Patent fingerprints are visible prints left on a surface, such as blood or dirt. Plastic fingerprints are three-dimensional impressions left on soft surfaces like clay or wax.

Without specific information on the crime scene or the type of fingerprints found, it is not possible to determine which type the investigator has encountered.

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Answer:

C6H12O2 is the formula for Methyl pentanoate

Answer:

Explanation:

Hess’s law derives directly from the law of conservation of energy, as well as its expression in the first law of thermodynamics. By Hess’s law, the net change in enthalpy of the overall reaction is equal to the sum of the changes in enthalpy for each intermediate transformation: ΔH = ΔH1+ΔH2+ΔH3.

Answer:

Substance A

Explanation:

Specific heat is defined by the amount of heat needed to raise the temperature of 1 gram of a substance 1 degree Celsius (°C).  

A higher specific heat means it takes more energy to increase the temperature of the substance compared to other substances. Since Substance A has a lower specific heat, it takes less energy to raise the temperature so it will rise in temp faster.

The pressure inside the tire, converted to pascals, is approximately 8,555 N/m^2, or 8.56 × 10^3 Pa, using the appropriate number of significant figures.

To convert the pressure from pounds per square inch (psi) to pascals (Pa), we need to use the given conversion factors:

1 pound = 4.45 newtons

1 inch^2 = 6.45 centimeters^2 = (6.45/100)^2 square meters

First, let's convert psi to newtons per square inch (N/in^2):

28.0 psi * 4.45 N = 124.6 N/in^2

Now, let's convert newtons per square inch to pascals:

124.6 N/in^2 * ((6.45/100)^2) m^2 = 8,555.4125 N/m^2 (approximately)

To express the answer to the correct number of significant figures, we need to determine the number of significant figures in the given pressure value. Since the pressure is given as "28.0," it implies that there are three significant figures. Therefore, the pressure inside the tire, converted to pascals, is approximately 8,555 N/m^2, or 8.56 × 10^3 Pa, using the appropriate number of significant figures.

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Answer:

2H2O + O2 -- 2H2O

FeCl3 + 3NaOH -- Fe(OH)3 + 3NaCl

4P + 5O2 -- 2P2O5

2Na + 2H2O -- 2NaOH +H2

2Ag2O -- 4Ag + O2

K + MgBr -- KBr + Mg

Explanation:

the moles of each element should be the same in both reactant reaction and product reaction

The mass of the asteroid is C. 1.2 x \(10^{12}\) Kg

To find the mass of the other asteroid, we can rearrange the equation for the gravitational force between two objects:

F = (G * m1 * m2) / \(r^{2}\)

where F is the force of gravity, G is the gravitational constant, m1 and m2 are the masses of the two asteroids, and r is the distance between them.

Given that the distance between the asteroids is 75000 m, the force of gravity between them is 1.14 N, and one asteroid has a mass of 8 x \(10^{7}\) kg, we can substitute these values into the equation and solve for the mass of the other asteroid (m2):

1.14 N = (6.67430 × \(10^{-11}\) N \(m^{2}\)/\(Kg^{2}\) * 8 x \(10^{7}\) kg * \(m2\)) / \((75000 m)^{2}\)

Simplifying and solving the equation, we find that the mass of the other asteroid (m2) is approximately 1.2 x \(10^{12}\) kg. Therefore, Option C is correct.

The question was incomplete. find the full content below:

Two asteroids are 75000 m apart one has a mass of 8 x \(10^{7}\) kg if the force of gravity between them is 1.14 what is the mass of the asteroid

A. 3.4 x \(10^{11}\) kg

B. 8.3 x \(10^{12}\) kg

C. 1.2 x \(10^{12}\) kg

D. 1.2 x \(10^{10}\) kg

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Explanation:

As a liquid, water has more directions to move and to absorb the heat applied to it. There is more surface area that needs to be heated for the overall temperature to increase. However, with ice, the surface area doesn't change due to its more rigid structure

When you increase the amount of carbon dioxide in the atmosphere, you also increase the amount of carbonic acid in the ocean.

Carbon dioxide is absorbed from the atmosphere into the ocean through a process called "oceanic uptake," which is facilitated by the exchange of gases at the air-sea interface.

As more carbon dioxide is emitted into the atmosphere, the concentration of carbon dioxide in the ocean increases, leading to a phenomenon called "ocean acidification".

Ocean acidification can have a number of negative impacts on marine organisms, including reduced growth rates and weakened shells or skeletons.

Thus, we can conclude this increases the amount of carbonic acid in ocean.

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The two atoms are isotopes of each other are Si with a mass number of 27 and an atomic number 14, and Mg with a mass number of 25 and an atomic number of 12. The correct option is A.

Isotopes are atoms with the same number of protons but differing numbers of neutrons.

They differ in mass, which affects their physical characteristics even if they have nearly identical chemical properties.

An isotope is one of two or more chemical elements that exist in different forms. Varied isotopes of an element share the same atomic number and protons in their nuclei, giving them the same atomic weight.

However, each elemental isotope has a different amount of neutrons, which changes its atomic weight.

They can be referred to as isotopes because Si, which has a mass number of 27 and an atomic number of 14, and Mg, which has a mass number of 25 and an atomic number of 12, both have 13 protons.

Thus, the correct option is A.

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Answer:

Reha should apply 540 N to lift Neha.

Explanation:

L = 360 N

LD  = 60 m

E =?

ED = 40m

NOW

L * LD = E * ED

360 *60 = E*40

21600/40 = E

540 N = E

The correct IUPAC name of Mn(CN)2 is Manganese II cyanide.

IUPAC is an acronym that stands for International Union of Pure and Applied Chemistry.

This body is in charge of devising the framework for the nomenclature of all chemical substances.

To name an ionic compound,  we must write the name of the metal followed by its oxidation state and lastly the name of the anion.

Hence the name of  Mn(CN)2 is Manganese II cyanide.

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b is the correct answer

Answer: D. 99.9mg/L

Explanation:

21.1x4.97/1.05=99.9

Answer:

Talc powder suspended in air

Answer:

increases

Explanation: As we move from left to right the atomic number increases due to which radii

Answer:

How do amoeba respire.

how do plants respire.

Answer:

get it back to me by tomorrow

Explanation:

I am currently in life generally but will be perfect

Answer:

I'm not sure what you're trying to imply here. I'll assume that you want to check if the chemical equation is balanced.

In this case, No. The equation is not balanced.

Merry Christmas and a happy new year! :)

Answer:

Iron‑56 is the most abundant isotope, so the atomic mass of iron is most similar to the mass of iron‑56.

Explanation:

The atomic abundance of the isotopes of Iron is:

⁵⁴Fe: 5.82%

⁵⁶Fe: 91.66%

⁵⁷Fe: 2.19%

⁵⁸Fe: 0.33%

Where the Iron-56 is the most abundant isotope of Iron atom

As atomic mass is defined as the sum of the masses of the ions multiplied by its abundance, and the Iron-56 is the most abundance isotope, the atomic mass of Fe most be similar to the ⁵⁶Fe mass because is the most abundant isotope.

Right option is:

Iron‑56 is the most abundant isotope, so the atomic mass of iron is most similar to the mass of iron‑56.

the atomic abundance of the isotopes of Iron is:

⁵⁴Fe: 5.82%

⁵⁶Fe: 91.66%

⁵⁷Fe: 2.19%

⁵⁸Fe: 0.33%

Since the Iron-56 is the most abundant isotope of the Iron atom

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Answer:

oxygen and Carbon dioxide

Answer:

maybe 2455.2, good luck

Answer:

1.36 x 10^24 molecules

Explanation:

1 mole of CO2 has 6.022 x 10^23 moles

=> 2.25 x 6.022 x 10^23 = 1.35495 x 10^24 or 1.36 x 10^24

The mass of P-32 remaining after 27 days, if the initial mass is 40g is 10.5 g.

The half-life of a radioactive isotope is the amount of time it takes for one-half of the radioactive isotope to decay.

The half-life of a specific radioactive isotope is constant; it is unaffected by conditions and is independent of the initial amount of that isotope.

The number of half lives in 27 days;

n = 27 days/14 days

n = 1.929

The mass of P-32 remaining after 27 days, if the initial mass is 40g;

mass remaining = 40 g / (2^1.929)

mass remaining = 40 g / 3.808

mass remaining = 10.5 g

Thus, the mass of P-32 remaining after 27 days, if the initial mass is 40g is 10.5 g.

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Answer:

C₁₅N₃H₅

Explanation:

Let's assume we have 240 g of the dye (1 mol), in that case we'd have:

Now we convert the masses of each element into moles, using their respective molar masses:

Thus the molecular formula is C₁₅N₃H₅.