Which of these statements is one of the conclusions that formed the basis of dalton’s atomic theory?.

If 2.00 tons of coal is burned, then the mass of nitrogen in the form of nox gases, is produced by this combustion is 400134 g of nitrogen.

The chemical reaction equation can be written as

C135H96O9NS + 156O2 ------- 135CO2 + 48H2O + NO + SO2

Mass of 2.0 tons of coal in gram = 1.814 × 10^(6) g

Molar mass of C135H96O9NS can be calculated as = 135(12) + 96(1) + 14 + 32 = 1904 moles of coal

Now, number of moles of coal burned = 1.814 × 10^(6) g / (1906 g/mol) = 952.7 moles of coal

If 1 mole of coal produced 1 mole of NO

Total 952.7 moles of coal produced 952.7 moles of NO

Mass of NO can be calculated as

Mass of NO produced = 952.7 × 30 = 28581 g

1 mole of NO = 30 g of NO

Thus, 14 g of nitrogen is contained in 30 g of NO

Let xg of nitrogen is contained in 28581 g of NO

Then,

x = 14 × 28581 = 400134 g of nitrogen.

If 2.00 tons of coal is burned, then the mass of nitrogen in the form of nox gases, is produced by this combustion is 400134 g of nitrogen.

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Explanation:

a fraction 880/1000 or 22/25

mixed number 44/5

whole number 8

this is the answer to ur question hope is helpful

Answer: B

Explanation: Genetics has to do with genes, which is appearance, which is hereditary from the parent :)

partial pressure of n2o in the gas mixture was found to be 143.6 kPa

what is partial pressure?

Each gas that makes up a mixture of gases has a partial pressure, which represents the pressure that would exist if that gas alone had filled the complete volume of the initial mixture at the same temperature. According to Dalton's Law, the partial pressures of the individual gases make up the overall pressure of a perfect gas combination.

A gas's partial pressure is a gauge of its molecules' thermodynamic activity. However, unlike liquids or gas mixtures, gases behave differently depending on their partial pressures when dissolving, diffusing, and reacting. This characteristic of gases often holds true for gas chemical reactions in biology.

As per the data give

Moles (o2) = 2.83 mol

Moles (n2o) = 8.41 mol

Total pressure = 192 kPa

so the total number of moles should be calculated

Total No.of moles = no of moles in  o2  + no of moles in n2o = 2.83 + 8.41 = 11.24 mol

mole fraction for n2o

Mole fraction = moles  of compound/ Total moles

Mole fraction for n2o = 8.41 / 11.24 = 0.748

so now calculate the partial pressure of n2o

pn2o = 0.748 192 kPa

pn2o = 143.6 kPa

therefore the partial pressure of the n2o was 143.6 Kpa

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With density 1.00 g/ml and a specific heat of 4.184 j/g we can see that the heat of the chemical reaction in joules is H = 1,596 J

We are given

Total volume of the mixture = 70.6 ml

Change in temperature = 6.1 °C

Density of reaction mixture =  1.00 g/ml

Specific heat of water =  4.184 J/g = 4200 J/Kg

Now Density = mass/volume

Mass of water = Density × volume

Mass of water =  1 g/mL × 62.3 mL

Now in order to find heat in joules, let's use the formula.

H = mcθ

m = mass of water

c = heat capacity of water

θ = temperature rise

Now substituting the values we get

H = 0.0623 Kg × 4200 J/Kg × 6.1 °C

H = 1,596 J = 1.5 KJ

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When a piece of I2 in 50 ml of water is placed then another piece of I2  of the same mass in C6H14 is placed then hydrogen bonding is formed in water and a strong London dispersion force occurs.

C6H14 is a straight chain alkane with 6 carbon atoms with no double or triple bond.this is non polar. So, London dispersion forces exist.this is the force that exists between all molecule.this is the weakest intermolecular forces.the boiling point of C6H14 increases as their atomic mass increases due to stronger London dispersion force.

Water has strong intermolecular forces.in this,hydrogen bonding and dipole moment created by the strong electronegative oxygen and hydrogen.water has hydrogen bond,dipole induced dipole forces and London dispersion forces.

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162 grams of water have the same no. of oxygen atoms as 9.0 mol of oxygen gas.

1 mol of oxygen contains 6.023 * 10 [23] oxygen atoms.

That means 9.0 mol of oxygen gas is equals to 9*6.023*10[23] oxygen atoms .

To calculate the grams of water which will have 9*6.023*10[23] atoms of oxygen.

We have to know that in 18gms of water 1 oxygen atom is present.

So, for 9 oxygen atoms we will multiply with 18 that is 162 gms.

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Out of all the compounds - ch2ch2 (Ethylene), ch3ch3 (Ethane)and hcch the compound with the shortest bond length is hcch (Ethyne)

Bond length is the equilibrium distance between the nuclei of two groups or atoms that are bonded to each other.

Bond length depends upon bond strength and is inversely proportional to it, therefore longer the length of bond, less the bond strength.

CH3-CH3 is Ethane, the C-C bond is a single bond.

CH2=CH2 is Ethylene, the C-C bond is a double bond.

CHCH is Ethyne, the C-C bond is a triple bond.

As we know, Bond length and bond strength gets shorter and stronger as the number of bonds between the two atoms increases. Here single bond has the largest bond length and triple has the shortest bond length.

So, in order of C-C bond length (longest to shortest) you have ethane > ethylene > ethyne

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Step 1: Begin with a balanced chemical equation and starting amounts for each reactant.

Step 2: Convert mass of each starting reactants to moles.

Step 3: Calculate the number of moles used for each reactant. is the limiting reagent.

what is limiting reaction?

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Silicon dioxide is found in sand, quartz glass, and silica gel packets found in packaging of shoes and electronics. the formula for silicon dioxide is SiO₂.

The formula for silicon dioxide is SiO₂.  silicon dioxide is called as silica. silicon dioxide is commonly found in quartz. it is transparent solid. it is used in adhesives, ceramics. it is also used in agriculture chemicals. white and whitish yellow as sand or powder. it is the main part in optical fiber.

Thus, Silicon dioxide is found in sand, quartz glass, and silica gel packets found in packaging of shoes and electronics. the formula for silicon dioxide is SiO₂.

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The initial volume of the argon gas sample at a constant temperature is 36.24 L.

Let the initial pressure and initial volume be P and V respectively

And the final pressure and volume be P' and V' respectively

At constant temperature, for the given sample,

P = 3.34 atm

V = ?

P' = 8.18 atm

V' = 14.8 L

The ideal gas law is PV = nRT,

At constant T (temperature), PV = constant

According to Boyle's law, the product of the pressure and volume of an ideal gas at constant temperature is constant.

For ideal gas argon at a constant temperature, using Boyle's law we get

P * V = P' * V'

3.34 * V = 8.18 * 14.8

V = 121.06 / 3.34

∴ V = 36.24 L

Thus at 3.34 atm and constant temperature, the volume of a sample of agon gas is 36.24 L

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The three major flaws addressed by Moran's periodic spiral are:

1) Since hydrogen possesses distinct attributes that set it apart from every other element in the table, it effectively does not belong to any of the table's 18 columns.

2) The lanthanides and actinides, which are the elements from each period of the f block, have comparable properties but are not shown in columns in the table.

3) The column-and-row layout of the  periodic table hides the continuity between the pieces, which is better represented by an a spiral.

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The volume of chlorine gas produced at STP by the current of 2.5 amperes flowing for a period of 1.8 hours through an aqueous solution of silver chloride is 1.504 L.

The moles of chorine gas that are liberated at STP by passing a given current through an electrolyte containing chloride ions is determined from the equation of the oxidation reaction that occurs when chlorine gas is liberated from chloride ions.

The equation of the oxidation reaction is given below:

2 Cl⁻ ---> Cl₂ (g) + 2 e

From the equation of reaction, two moles of electrons liberated 1 mole of chlorine gas.

The volume of 1 mole of chlorine gas = 22.4 L

Quantity of current in 2 moles of electrons = 2 * 96500 C

Quantity of current in 2 moles of electrons = 193000 C

Quantity of current in 2.5 amperes flowing for a period of 1.8 hours = 2.5 * 1.8 * 3600

Quantity of current in 2.5 amperes flowing for a period of 1.8 hours = 12960 C

The volume of chlorine gas produced = 12960 * 22.4/1930000

The volume of chlorine gas produced = 1.504 L

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Complete question:

What volume of chlorine gas measured at STP would be liberated by the current of 2.5 amperes flowing for a period of 1.8 hours through an aqueous solution of silver chloride?

The empirical formula of a mineral is FeCr2O4.

What is known as empirical formula?

The definition of an empirical formula for a compound is one that displays the ratio of the components present in the complex but not the precise number of atoms in the molecule. Subscripts are used next to the element symbols to indicate the ratios.

Explanation:

[tex]O: 28.59 g x 1 mole O/16 g = 1.79 moles OFe: 24.95 g x 1 mole/55.8 g = 0.447 moles FeCr: 46.46 g x 1 mole/52 g = 0.893 moles CrDividing through by 0.447 one gets 4O, 1Fe and 2CrEmpirical formula = FeCr2O4[/tex]

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The ratio between the components is the empirical formula. Presented as;  FeCrO₃.

Typically, the equation is used to only show the components of a molecule. When one wishes to rapidly identify the elements they are working with, this is helpful. When you want to learn how many atoms of each element are present in the molecule, the chemical formula is the most helpful.

Divide the percentage composition by the atomic mass of the elements

Fe =24.95 / 55.845  = 0.4467

Cr = 46.46 / 51.9961 = 0.8935

O = 28.59 / 16  = 1.78

Step 2:

Divide all though by the smallest number (0.4467)

Fe = 0.4467 / 0.4467 = 1.002

Cr = 0.8935 / 0.4467 = 1

O = 1.78 / 0.4467 = 3.038

The ratio between the components is the empirical formula. Presented as; FeCrO₃

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Answers:

1) If the marble usually rolls right to the end of the box without bouncing off anything, this indicates that the size of the targets is appropriate for the marble.

2) Rutherford's data led him to conclude that atoms are mostly empty space, with a very small, very dense nucleus at the center. This data changed the model of the atom from a solid, indivisible sphere to a mostly empty space with a small, dense nucleus.

3) Bohr's model of the atom was an improvement on Rutherford's model. Bohr made the following changes:

These changes helped to explain the spectral lines of atoms and the stability of atoms.

Answer:

C) lattice of neutral atoms with delocalised electrons

Explanation:

Fact 1: metals are elements and therefore they contain atoms that are electrically neutral

Fact 2: in all atoms, the electrons are delocalised/ are free moving electrons (as the electrons serve their purpose in different forms depending whether you look at it the chemistry way or physics way)

metals are solid and hence they have a lattice structure

(tho at my school we focus on giant ionic lattice structure when explaining based on ionic compounds so i can't guarantee that 'giant ionic lattice structure' and 'lattice structure' are the same, hence i just stick with lattice structure for this explanation ^^)

explanation for other options:

they said negative/positive ions which is not true since atoms are electrically neutral

only when the atoms undergo chemical reactions will they be charged

If a 10.0 ml sample of this buffer is diluted to 1000 ml with water,the ph of the diluted buffer is 9.26.

pH of Buffer Solution can be calculated as :

pH = pKa  - log ( [ Salt ] / [ Base ] )

Since Kb = 1.8 x 10-5  

then , pKb = 4.74

Since , pKa  +  pKb = 14  \Rightarrow pKa = 9.26

Initial concentration of NH3  and (NH4)+  is 1 M.

Now 10 mL of the sample is taken and diluted to 1000 mL

Since , M1V1 = M2V2

Where M1 is the Molarity of the solution before dilution and V1 is the volume taken  ( M1 = 1 M ; V1 = 10 mL)

M2 is the Molarity of the solution after dilution and V2 ( V2 =1000 mL ) is the Final volume  of the solution.

M2 = M1V1 / V2    \Rightarrow  M2 = ( 1 x 10 ) / 1000 = 0.01 M .

Final concentration of NH3  and (NH4)+  in the sample is 0.01 M.

then , [ Salt ] / [ Base ]  = 1

Since ,   log( 1 ) =0

Then pH = pKa = 9.26

The pH of the Buffer solution is 9.26.

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Transitions of electrons within atoms or ions form spectral lines at different rungs which leads to emission of lines of different colors. Spectrum of calcium is more complicated than the spectrum of hydrogen because calcium atom have more electrons than hydrogen.

A spectral line in an otherwise smooth and continuous spectral is a dark or bright line resulting from the emission or absorption of light in a narrow frequency range compared to adjacent frequencies. Spectral lines are frequently used to identify atoms and molecules.

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0.3147128245 moles of AgNO₃ will be needed to completely react with 10.0 g of Cu.

Determine the number of moles of copper by dividing its mass by its molar mass.

moles Cu = mass Cu / MM Cu

moles Cu = 10.0 g/ 63.55 g/mol

moles Cu = 0.1573564123

Based on the balanced chemical reaction between copper and silver nitrate, 1 mole Cu needs 2 moles AgNO₃ to proceed with the reaction completely.

Cu + 2AgNO₃ ⇒ 2Ag + Cu(NO₃)₂

If there are 0.1573564123 moles Cu, then 0.3147128245 moles AgNO₃ is needed.

moles AgNO₃ = 0.1573564123 moles Cu(2 moles AgNO₃ / 1 mole Cu)

moles AgNO₃ = 0.3147128245

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The ground state electronic configuration of Nitrogen atom is 1s²2s²2p³

The ground state electronic configuration of vanadium atom is 1s²2s²2p⁶3s²3p⁶4s²3d³

Electron configuration is the distribution of electrons within an atom or molecule (or other physical structure) in atomic or molecular orbitals. For example, the electron configuration of the neon atom is 1s²2s²2p⁶. This means that the 1s, 2s and 2p subshells have 2, 2 and 6 electrons respectively.

The electronic configuration of a type of atom (neutral or ionic) allows us to understand the shape and energy of its electrons. Many general rules are followed in assigning an electron's "position" to its possible energy states, but these assignments are arbitrary and it is always unknown which electron is being described. Knowing the electronic configuration of a species allows us to better understand its binding ability, magnetism and other chemical properties.

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The theoretical yield in grams for this reaction under the given conditions is 11.05g.

The theoretical yield is the greatest amount of a product that can be produced in a chemical reaction. It can be determined using the chemical equation with balance. the relative formula mass, mass, and mass of the  limiting reactant, as well as the relative formula mass of the result

Given,

Mass of H₂ = 1.96 g

Mass of N₂ = 9.78 g

Molar mass of H₂ = 2 g/mol

Molar mass of N₂ = 28 g/mol

Lets calculate the moles of N₂ and H₂,

Moles of H₂ = [tex]\frac{given mass}{molar mass}[/tex]

H₂ = [tex]\frac{1.96}{2}[/tex]

H₂ = 0.98 mol

same for moles of N₂ = [tex]\frac{given mass}{molar mass}[/tex]

N₂ = [tex]\frac{9.78}{28}[/tex]

N₂ = 0.349 mol

Now, calculate limiting and excess reagent.

The balanced chemical equation is:

3H₂ + N₂ = 2NH₃

From the balanced reaction we conclude that.

As, 3 mole of H₂ react 1 mole of N₂

So, 0.98 moles of H₂ react with 0.98/3 = 0.32 moles of N₂

From this we conclude that, N₂ is an excess reagent because the given moles are greater than the required moles and H₂ is a limiting reagent and it limits the formation of product.

Let us calculate the moles of NH₃

From the reaction, we conclude that

As, 3 mole of H₂ react to give 2 mole of NH₃

So, 0.98 mole of H₂ react to give [tex]\frac{2}{3}[/tex]×0.98 = 0.65 mole of NH₃

Now we have to calculate the mass of NH₃

Mass of NH₃ = Moles of NH₃ × Moles of NH₃

Molar mass of NH₃ = 17 g/m

Mass of NH₃ = 0.65 × 17

Mass of NH₃ = 11.05g

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Partition coefficient Chloroform = 11.98, Diethyl Ether = 2.81 and Benzene = 1.05      

Chloroform would be the ideal solvent to use when extracting the chemical from an aqueous solution because it has the highest solubility.

A solution is a homogenous mixture of one or even more solutes in a solvent. Adding sugar cubes to a cup of tea or coffee is an example of a solution. A property that facilitates the dissolution of sugar molecules is solubility. Solubility is the property of a substance (solute) to dissolve in a particular solvent. A solute is any solid, liquid, or gaseous substance that dissolves in a solvent.    

The compound needs 2 grams of solvent to dissolve it.

Finding solubility

For water, 2g/90ml= 2.22

For chloroform, 2g/7.50= 26.6

For diethyl ether, 2g/32= 6.25

For benzene, 2g/85= 2.35

Partition Coefficients -

For chloroform = 11.98

For Diethyl Ether = 2.81

For Benzene = 1.05

As a result of its high solubility, chloroform would be used to extract a compound from an aqueous solution.

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Answer:

Exoplanets

Explanation:

Exoplanets are planets beyond our own solar system. Thousands have been discovered in the past two decades, mostly with NASA's Kepler Space Telescope.

When you are working diligently in the chemistry lab, when suddenly a small explosion occurs in the rear of the room , immediately and automatically capturing your attention, this is an example of Reflexive attention.

Reflexive attention is essentially a semi-autonomous decision making system.

The brain regulates vital body functions such as heartbeat, movements and learning processes. Also, the brain controls the psychological processes such as memory, wakefulness, and attention.

Attention is categorized into two groups; voluntary and reflexive.

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Answer:  6.022 x 10²³ units

Explanation:

The solution for addressing transportation concerns and reducing the amount of carbon dioxide released into the atmosphere might include promoting vehicles powered by renewable energy sources to harvest the crops and get them to market (Option B).

The expression renewable energy sources make reference to different types of energy that replace the use of fossil based fuels in order to avoid the increase in the carbon dioxide level.

Therefore, with this data, we can see that renewable energy sources such as wind energy or solar energy replace fossil based fuels.

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Wavelength is chosen by analyzing the spectrogram.

Wavelength can be defined as the distance between two successive crests or troughs of a wave. It is measured in the direction of the wave.

A spectrogram gives a going for walks show of a sound signal because it takes place in real time, a spectrum, however, offers us a photograph of the sound at a particular factor in time. A spectrum can permit you to see.

Spectrograms map out sound in a comparable way to a musical rating, only mapping frequency rather than musical notes. Seeing frequency energy allotted over the years in this manner allows us to genuinely distinguish each of the sound factors in a recording, and their harmonic shape.

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Answer:

Let us know formula and denotion for Lithium oxide is Li2O.

Explanation:

While on the basis of Electronic configuration:

Lewis structure(for Lithium atom)-Li•

For Oxygen atom- it is 6 dots in the Word O(for Oxygen) but is needed to paired in a pair(of two dots if possible) by the use of either all sides where two dots are presented two sides While one dot is represented on other two sides.

When we come across we might have a simple question how and why the Lithium oxide is Li2O

So,as we know Li(have one electron in its outermost shell),written as Li^+/+1 While Oxygen requires 2 more electrons to stabilize its valency,so it written as O^-2/2-

On combining,Li^+ & O^-2

Exchange and crossing up of valency is done forming Li2O.

Do check the image uploaded for better clarity and understanding.

The calculations possible using only 28.02 g/mol as a conversion factor are:

One of many ways to do a conversion in chemistry is by using the conversion factor. It is an arithmetical multiplier for converting a quantity of a unit to the equivalent expressed in another.

Given the conversion factor of 28.02 g/mol (molar mass of nitrogen), we could calculate the grams of  N2 in 5.03 x 10^20 moles of nitrogen gas. We also can calculate the moles of N2 molecules in 3.94 grams of nitrogen gas by using 28.02 g/mol as the conversion factor.

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