What is the mass of a bone that has a volume of 80.0 cm3 and a density of 1.9 g/cm3 ?
Show the work in conversion factors format please!

The limiting reactant if 4. 0 g of nh3 react with 8. 0 g of oxygen is Oxygen because  it produces only 0. 20 mol of NO. the option A is correct.

The reactant that is present in a chemical reaction at a lower concentration than the other reactant and determines the production of the product is known as the limiting reactant.

Ammonia dissociation's balanced equation is:

4NH₃ +5O₂⇒ 4NO +6H₂O

To react with 5 moles of oxygen, 4 moles of ammonia are needed.

The moles are listed as:

moles = mass/ mass molar

The available moles of ammonia in 4 gram is:

moles NH₃ = 4 /17 = 0.23 moles

moles oxygen = 8 / 16 = 0.25 moles

The moles of oxygen required for 0.23 moles of ammonia are:

5/4 x 0.23 = 0.28 moles

The amount of oxygen that is needed is 0.28 mol, yet there are only 0.25 mol of oxygen that are readily available. So, the limiting reagent is oxygen.

Therefore, choice A is right.

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The molar standard Gibbs energy for 4N14N is -95.6 kJ/mol at T = 298.15 K.

To determine the molar standard Gibbs energy for 4N14N, we can use the formula ΔG° = -RTln(K), where R is the gas constant, T is the temperature, and K is the equilibrium constant.

From the given information, we can calculate K using the equation K = (i/2π\()^{3/2\) * (2πmkT/\(h^2\)\()^{3/2\)* exp(-B/RT), where i is the moment of inertia, m is the mass of the molecule, h is Planck's constant, and B is the rotational constant. Plugging in the values and solving for ΔG°, we get -95.6 kJ/mol.

Therefore, the molar standard Gibbs energy for 4N14N is -95.6 kJ/mol at T = 298.15 K.

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To determine the molar standard Gibbs energy for 4N14N, we can use the statistical thermodynamics approach by considering the rotational partition function and the electronic partition function.
Given, the ground electronic state is nondegenerate, which means the electronic partition function (q_e) is equal to 1.

The rotational partition function (q_r) can be calculated using the formula:
q_r = 8π^2lkT / (hcσ)
where I is the moment of inertia, k is the Boltzmann constant, T is the temperature, h is the Planck constant, c is the speed of light, and σ is the symmetry number. For a diatomic molecule, σ is equal to 2.
To calculate the moment of inertia (I), we use the following formula:
I = μr^2
where μ is the reduced mass of the molecule and r is the internuclear distance. Using the given internuclear distance (i = 2.36 x 10 cm) and the rotational constant (B = 1.99 cm), we can determine the reduced mass of the molecule.
B = h / (8π^2Ic)
Now, we have all the necessary values to calculate the Gibbs energy using the formula:
ΔG = -RT ln [(q_e)(q_r)]
where R is the gas constant.
After substituting the known values and solving for ΔG, make sure to express your answer with the appropriate units (usually in Joules per mole, J/mol).

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Answer: The equilibrium constant for the reaction is 54.47

Explanation:

The equilibrium constant is defined as the ratio of the concentration of products to the concentration of reactants raised to the power of the stoichiometric coefficient of each. It is represented by the term \(K_{eq}\)

The given chemical equation follows:

\(H_2+I_2\rightleftharpoons 2HI\)

The expression for equilibrium constant will be:

\(K_{eq}=\frac{[HI]^2}{[H_2][I_2]}\)

We are given:

\([HI]_{eq}=1.3544\times 10^{-2}M\)

\([H_2]_{eq}=4.5647\times 10^{-3}M\)

\([I_2]_{eq}=7.378\times 10^{-4}M\)

Putting values in above expression, we get:

\(K_{eq}=\frac{(1.3544\times 10^{-2})^2}{(4.5647\times 10^{-3})(7.378\times 10^{-4})}\\\\K_{eq}=54.47\)

Hence, the equilibrium constant for the reaction is 54.47

Answer:

So combining blue with yellow light is like combining blue light with red and green light. The result of combining these three primary colors of light is to produce white light.

Explanation:

Answer : The correct option is, (B) has fewer subatomic particles than an atom of iron (Fe) .

Explanation :

The given element is chromium (Cr). The atomic number of chromium is 24.

As we know that the atomic number is either equal to the number of protons or number of electrons.

So, Atomic number = Number of protons = Number of electrons = 24

And we know that mass number is the sum of number of protons and number of neutrons.

Mass number of chromium = 52

Mass number = Number of protons + Number of neutrons

52 = 28 + Number of neutrons

Number of neutrons = 28

And we know that the atomic number of iron (Fe) is 26.

Number of protons = Number of electrons = 26

Mass number of Fe = 56

Number of neutrons = 30

From the given options we conclude that the a neutral atom of chromium has fewer subatomic particles than an atom of iron (Fe).

Hence, the correct option is, (B) has fewer subatomic particles than an atom of iron (Fe) .

Answer:

-415.5°F (-248.6°C)

Explanation:

Answer: The melting point/condensation point of neon is 24.53888889. Of course, I'm sure you can round that. The freezing point would be 521.74. All of this is in Kelvin

The correct lewis/electron dot structure is given below

The diagrams known as Lewis structures, often referred to as Lewis dot formulas, Lewis dot structures, electron dot structures, or Lewis electron dot structures, depict the interactions between the atoms in a molecule as well as any lone pairs of electrons that may be present.

The valence shell electrons of a molecule are shown in an extremely simplified manner by a Lewis Structure. It is used to demonstrate how the electrons in a molecule are positioned around particular atoms. Electrons are shown as "dots" or, in the case of a bond, as a line connecting the two atoms.

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Answer:

B and C

Explanation:

is it multiple choice question??

Van der Waals forces are the interaction between the molecules and the atoms. It increases with an increase in the molecular size and the number of electrons. Thus, options B and C are correct.

Van der Waals forces are the weak forces of attraction and repulsion present between the atoms and the molecules of the compounds. They are also called London Dispersion Forces and dipole-dipole forces.

An increase in the number of electrons and size of the molecule increases the surface area and the electron cloud which in turn, increases the Van der Waals force.

The intermolecular force increases as in large atoms or molecules the valence are held loosely as they are far from the nucleus or the center of the atom.

Therefore, the size and the electron increase the Van der Waals force.

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There are a total of 4 hydrogen atoms on the reactant side of the balanced equation.

On the reactant side of the balanced equation, there are no hydrogen atoms present.

The balanced equation for the reaction between calcium carbide (CaC2) and water is:

CaC2 + 2H2O → C2H2 + Ca(OH)2

In this equation, the reactant side consists of CaC2 and 2H2O. CaC2 does not contain any hydrogen atoms, while 2H2O represents two molecules of water, each containing two hydrogen atoms. Therefore, the total number of hydrogen atoms on the reactant side is 2 (hydrogen atoms in one molecule of water) multiplied by 2 (two molecules of water), which equals 4 hydrogen atoms.

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Answer:

The Percentage concentration of acetic acid = 1.39 %

Explanation:

Density of acetic acid solution = 1.05 g/mL

Volume of acetic acid solution = 0.1 L = 100 mL

From the formula, Density = mass / volume; mass = density × volume

Mass of acetic acid solution = 1.05 g/mL × 100 mL = 105 g

Molar concentration of acetic acid solution = 0.243 mol/L

Molar mass of acetic acid, CH₃COOH = (12 × 2 + 1 ×4 + 16 ×2) = 60 g/mol

From the formula, mass concentration = molar concentration × molar mass

Mass concentration of acetic acid, CH₃COOH = 0.243 mol/L × 60 g/mol = 14.58 g/L

In one liter of acetic acid solution, there are 14.58 g of acetic acid. Therefore, in 0.1 L, there will be 14.58 × 0.1 = 1.458 g of acetic acid.

Percentage concentration of acetic acid = mass of acetic acid / mass of acetic acid solution × 100%

Percentage concentration of acetic acid = (1.458 / 105) × 100% = 1.39 %

The Percentage concentration of acetic acid = 1.39 %

The correct option is D. H2O.

For the combustion of ethane (C2H6); the chemical equation is;

2 C2H6 + 7 O2 --> 4 CO2 + 6 H2O.

All hydrocarbons go through combustion processes, and the only byproducts are water (H2O) & carbon dioxide (CO2).

Any of a group of organic molecules with only the atoms carbon (C) & hydrogen are known as hydrocarbons (H). The hydrogen atoms bind to the carbon atoms in a variety of ways to create the compound's structural framework. chemical mixture.

The classification of hydrocarbons are done by-

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The complete question is -

Given the incomplete equation for the combustion of ethane (C2H6): 2 C2H6 + 7 O2 --> 4 CO2 + 6 ___

Group of answer choices:

A. H2O2

B. HCOOH

C. CH3OH

D. H2O

Answer:

oxygen<carbon<aluminium<potassium

Explanation:

atomic radius increases down the group but decreases across the period

Answer:

R = 8.314 pKa*L/mol*K

The value for the ideal gas constant (R) is approximately 8.314 kPa·L/(mol·K).

To determine the value for the ideal gas constant (R) when pressure (P) is in kilopascals (kPa), temperature (T) is in kelvins (K), volume (V) is in liters (L), and amount of gas (n) is in moles, we need to use the appropriate units for R based on these measurements.

The ideal gas constant, R, can be expressed in various units. The most common units for R are:

R = 0.0821 L·atm/(mol·K) (atmospheres, liters, moles, and kelvins)

However, since you provided the measurements in kilopascals, liters, moles, and kelvins, we need to use a different value for R that is consistent with these units:

R = 8.314 kPa·L/(mol·K)

Therefore, when pressure is in kilopascals, volume is in liters, amount of gas is in moles, and temperature is in kelvins, the value for the ideal gas constant (R) is approximately 8.314 kPa·L/(mol·K).

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Answer:

2-octene

Explanation:

the 8-carbon chain (oct); has a double bond (ene) is on the 2nd carbon (2-)

A liquid at 50 degrees Celsius would have a melting point of 50 degrees Celsius and a boiling point of approximately 173.15 degrees Celsius.

What is the liquid?

iquid is a state of matter that has a definite volume, but does not have a fixed shape. It is one of the four fundamental states of matter, along with solid, gas, and plasma. Liquids tend to have a greater volume than solids, but geneLrally take the shape of their container. Examples of liquids include water, milk, blood, gasoline, and oil. Liquids are composed of molecules that tend to have greater mobility and can easily flow past each other. Depending on the temperature, pressure, and composition of the liquid, it can undergo changes in the state of matter.

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If the spots on a TLC plate are made too large when preparing it for development, there are a few potential consequences.

First, the resolution of the separation may be compromised, as the larger spots will not allow for as much separation between different components in the sample. Second, the spots may merge together as they migrate up the plate during development, making it difficult or impossible to distinguish between different components.

Finally, the larger spots may saturate the stationary phase on the TLC plate, which can lead to poor retention and separation. It is important to carefully control the size of spots when preparing a TLC plate to ensure accurate and effective separation of components in the sample.

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Answer: The heat energy produced is 53831.25KJ

Explanation:

METHANE is the main component of natural gas. It can undergo combustion reaction in air with a bright blue flame to produce carbondioxide and water. The heat of reaction (enthalpy) is negative because heat is absorbed during the chemical reaction. To calculate the heat energy produced by the combustion of one kilogram (1 kg) of methane the following steps are taken:

Molecular mass of methane =16 gm/mol.

So moles of 1 kg methane =

Given mass of methane ÷ molecular weight of methane

But the given mass = 1kg = 1000g

Therefore,

moles of 1000g methane = 1000÷16

= 62.5 moles

Hence, energy evolved = (moles of methane) × (heat of combustion)

Therefore,

heat energy produced= 62.5 × (-861.3kj)

= -53831.25kj

​

The heat energy produced by the combustion of one kilogram of methane is –53831.25 KJ

We'll begin by calculating the number of mole in 1 Kg of CH₄

Mass of CH₄ = 1 kg = 1000 g

Molar mass of CH₄ = 12 + (4×1) = 16 g/mol

Mole = mass /molar mass

Mole of CH₄ = 1000 / 16

CH₄ + 2O₂ —> CO₂ + 2H₂O ΔH = –861.3 KJ

From the balanced equation above,

1 mole of CH₄ reacted to produce –861.3 KJ.

Therefore,

62.5 moles of CH₄ will react to produce = 62.5 × –861.3 = –53831.25 KJ

Thus, –53831.25 KJ of heat energy is produced.

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Answer:

three

Explanation:

Every element in the boron group has three electrons in its outermost shell (so-called valence electrons), and for each element there is a sharp jump in the amount of energy required to remove the fourth electron, reflecting the fact that this electron must be removed from an inner shell.

Answer:

/dɪˈmɒkrəsi/

--noun--

A system of government by the whole population or all the eligible members of a state, typically through elected representatives.

The true statement is Most of the minerals in granite weather to clay except quartz.

So, the correct answer is A.

This is because quartz is a very hard and durable mineral that is resistant to weathering. Other minerals in granite, such as feldspar and mica, are more susceptible to weathering and break down into clay minerals over time.

This process is known as chemical weathering, where minerals are altered or dissolved by chemical reactions with water and other substances in the environment.

While some minerals may weather more quickly than others, the overall rate of weathering depends on a variety of factors such as climate, topography, and the composition of the rock.

Hence, the answer of the question is A.

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The solution with the highest vapor pressure will be the one with the lowest boiling point and the most volatile components.

According to Raoult's law, the vapor pressure of a solution is directly proportional to the mole fraction of the solvent. So, in this case, the solution with the lowest amount of solute would have the highest vapor pressure. From the options given, the solution with the lowest concentration of solute is 0.75 m C2H5OH. Ethanol has a lower boiling point and is more volatile compared to the other solutes, thus the solution with 0.75 m C2H5OH is expected to have the highest vapor pressure.
To determine the solution with the highest vapor pressure, we need to consider Raoult's law, which states that the vapor pressure of a solution is directly proportional to the mole fraction of the solvent. In this case, the solution with the lowest molality will have the highest vapor pressure since it has the highest mole fraction of the solvent. Among the given solutions, 0.10 m Al(ClO) has the lowest molality, making it the solution expected to have the highest vapor pressure.

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The electrochemical cell consists of an aluminum electrode (Al) in contact with an aluminum ion solution (Al3+(aq)), a nitrogen monoxide ion solution (NO(aq)), a nitric acid solution (HNO3(aq)), and a hydrogen ion solution (H+(aq)) with a platinum (Pt) inert electrode. The overall reaction is 2Al + 6H+ + 6NO3- → 2Al3+ + 3H2O + 6NO. The cell diagram can be represented as Pt | H2(g) | H+(aq) || NO(aq), HNO3(aq) | Al3+(aq), Al.

In the given electrochemical cell, the anode is the aluminum electrode (Al) where oxidation occurs. The aluminum electrode loses electrons and forms aluminum ions (Al3+) in the solution. The balanced half-reaction at the anode is 2Al(s) → 2Al3+(aq) + 6e-.

The cathode is the platinum (Pt) electrode where reduction takes place. Nitrogen monoxide (NO) from the solution is reduced to nitrogen gas (N2). The balanced half-reaction at the cathode is 6NO(aq) + 6H+(aq) + 6e- → 6NO(g) + 3H2O(l).

Combining the two half-reactions, we get the overall reaction: 2Al(s) + 6H+(aq) + 6NO3-(aq) → 2Al3+(aq) + 3H2O(l) + 6NO(g).

The cell diagram is represented as Pt | H2(g) | H+(aq) || NO(aq), HNO3(aq) | Al3+(aq), Al. The platinum electrode acts as an inert electrode, providing a surface for electron transfer without participating in any chemical reaction.

Overall, the electrochemical cell involving the aluminum electrode, aluminum ion solution, nitrogen monoxide solution, nitric acid solution, and a platinum inert electrode allows the oxidation of aluminum and the reduction of nitrogen monoxide while producing aluminum ions, water, and nitrogen gas.

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When this mixture is supplied at a total pressure of 7.8 atm, the partial pressure of oxygen will be 0.0198 atm.

The amount of pressure that each gas in a mixture exerts is referred to as "partial pressure." This is found by using the formula, Partial pressure = Mole fraction × Total pressure.

First, find the mole fraction of the oxygen gas. This is calculated as follows,

\(\begin{aligned}X_{O_2}&=\mathrm{\frac{\frac{2\;g\cdot mol^{-1}}{32\;g\cdot mol^{-1}}}{\frac{2\;g}{32\;g\cdot mol^{-1}}+\frac{98\;g}{4\;g\cdot mol^{-1}}}}\\&=2.54\times10^{-3}\end{aligned}\)

Substituting the value of total pressure and mole fraction of oxygen, we get, the partial pressure value as 2.54×10⁻³×7.8 atm = 0.0198 atm.

Therefore, the required answer is found to be 0.0198 atm.

The complete question is -

A heliox deep-sea diving mixture contains 2.0 g of oxygen for every 98.0 g of helium. What is the partial pressure of oxygen when this mixture is delivered at a total pressure of 7.8 atm?

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From the structure of SF4 shown, the molecular geometry of the molecule is trigonal bipyramidal.

The term molecular geometry has to do with the arrangement of the electron pairs in a molecule.

The arrangement of electron pair in a molecule is based on the valence shell electron pair repulsion theory.  From the structure of SF4 shown, the molecular geometry of the molecule is trigonal bipyramidal.

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A hypothesis that could prove or disprove Janna’s claim is; bottle water is pure water hence it boils at 100°C.

Pure water is water that contains only hydrogen and oxygen and nothing else. Impure water contains other substances apart from hydrogen and oxygen in a ratio of 2:1.

The hypothesis of our experiment is that;" bottle water is pure water hence it boils at 100°C." A hypothesis is a tentative explanation for an observation.

We can carry out the experiment by bringing about three samples of the bottled water and insert a thermometer in each of the samples then record the initial temperature of the water. The samples are then heated to boiling point and the boiling point of each sample is recorded.

If the sample boil at exactly 100°C then the hypothesis is proven or vice versa.

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