HELP NEEDE ASAP Why NH3 ACTS AS BRONSTED-LIWERY BASE?

Answer:

since you only need 11 grams of propane to produce 36 grams of water you can divide 273.6 by 36. This gives us 7.6 which would be our "unit rate". We can then multiply 7.6 by 11 grams, which gives us 83.6.

So the answer is 83.6 moles of propane.

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1. We need 456 mL of 0.95M barium nitrate to make 101.0g of barium sulfate.

2. The actual yield of solid product formed is 20.20 g Ba3(PO4)2.

3. 25.8 mL of 0.800 M Ba(OH)2 solution would be required to produce 75 mL of 0.550 M NaOH.

1. We must determine the amount of barium nitrate needed to make 101.0 g of barium sulfate using stoichiometry and a known concentration of barium nitrate.

First, using the supplied mass and molar mass, we must determine the number of moles of barium sulfate produced:

101.0g BaSO4 × (1 mol BaSO4/233.4 g BaSO4) = 0.4332 mol BaSO4

Next, we calculate the required number of moles of barium nitrate using the stoichiometry of the balanced equation:

1 mol Ba(NO3)2/1 mol BaSO4

As a result, we need 0.4332 mol of Ba(NO3)2 in addition to 0.4332 mol of BaSO4.

Finally, to determine the volume needed, we use the volume and concentration of the barium nitrate solution:

0.4332 mol Ba(NO3)2 × (1 L/0.95 mol) × (1000 mL/1 L) = 456 mL

Therefore, we need 456 mL of 0.95M barium nitrate to make 101.0g of barium sulfate.

2. The theoretical yield of the reaction should be calculated using the available data, and the actual yield should be calculated using the percent yield.

Let's first determine how many moles of sodium phosphate were used:

70.0 mL of 1.30 M Na3PO4 = 0.091 mol Na3PO4

According to the stoichiometry of a balanced equation, the reaction between two moles of Na3PO4 and three moles of Ba(OH)2 produces one mole of Ba3(PO4)2. As a result, the amount of Ba3(PO4)2 generated can be calculated as:

0.091 mol Na3PO4 x (1 mol Ba3(PO4)2 / 2 mol Na3PO4) = 0.046 mol Ba3(PO4)2

We need to use the given information to determine the theoretical yield of the reaction, and then use the percent yield to calculate the actual yield.

First, let's calculate the moles of sodium phosphate used:

70.0 mL of 1.30 M Na3PO4 = 0.091 mol Na3PO4

According to the stoichiometry of the balanced equation, 2 moles of Na3PO4 react with 3 moles of Ba(OH)2 to produce 1 mole of Ba3(PO4)2. So the moles of Ba3(PO4)2 produced can be calculated as:

0.091 mol Na3PO4 x (1 mol Ba3(PO4)2 / 2 mol Na3PO4) = 0.046 mol Ba3(PO4)2

The molar mass of Ba3(PO4)2 can be calculated as:

3(137.33 g/mol Ba) + 2(30.97 g/mol P) + 8(16.00 g/mol O) = 601.91 g/mol

So the theoretical yield of Ba3(PO4)2 can be calculated as:

0.046 mol Ba3(PO4)2 x 601.91 g/mol Ba3(PO4)2 = 27.70 g Ba3(PO4)2

So the theoretical yield of Ba3(PO4)2 can be calculated as:

0.046 mol Ba3(PO4)2 x 601.91 g/mol Ba3(PO4)2 = 27.70 g Ba3(PO4)2

Finally, we can use the percent yield to calculate the actual yield:

Actual yield = Percent yield x Theoretical yield

Actual yield = 0.73 x 27.70 g Ba3(PO4)2 = 20.20 g Ba3(PO4)2

Therefore, the actual yield of solid product formed is 20.20 g Ba3(PO4)2.

3. The following formula can be used to determine how many moles of NaOH are contained in 75 mL of a 0.550 M solution:

moles = concentration x volume

moles = 0.550 mol/L x 0.075 L

moles = 0.04125 mol

We need half a mole of Ba(OH)2 because 2 moles of NaOH react with 1 mole of Ba(OH)2:

moles of Ba(OH)2 = 0.04125 mol / 2

moles of Ba(OH)2 = 0.020625 mol

We can use the following formula to determine how much 0.800 M Ba(OH)2 solution is needed to produce this amount of moles:

moles = concentration x volume

volume = moles / concentration

volume = 0.020625 mol / 0.800 mol/L

volume = 0.0258 L = 25.8 mL

Therefore, 25.8 mL of 0.800 M Ba(OH)2 solution would be required to produce 75 mL of 0.550 M NaOH.

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The hydrogen atom attains the electron configuration of helium, while the chlorine atom attains the electron configuration of neon. This is because hydrogen has only one electron, and by sharing it with chlorine, it completes its first energy level, which is similar to helium's configuration.

Chlorine has seven electrons in its outermost energy level, and by sharing one electron with hydrogen, it achieves eight electrons, completing its second energy level, which is similar to neon's configuration.

In the diatomic molecule HCl, the hydrogen atom (H) has one electron and chlorine (Cl) has seven electrons in its outermost energy level. By sharing a pair of electrons, hydrogen achieves the electron configuration of helium, which has two electrons in its outermost energy level. This is because the shared electron pair fills the 1s orbital, which is the first energy level for hydrogen.

Chlorine, after sharing the electron pair, achieves the electron configuration of neon, which has eight electrons in its outermost energy level. This is because the shared electron pair completes the 2p orbital, which is the second energy level for chlorine. Therefore, the answer is helium; neon, indicating the electron configurations attained by hydrogen and chlorine, respectively.

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Answer:: 1100 j

Explanation:

Solid aluminum has a specific heat capacity of 0.90 J/ gK joules of heat are absorbed to raise the temperature of 24.0 grams of aluminum from 300. K to 350. K is 11.080 J

Heat is the transfer of kinetic energy from one medium or object to another from an energy source to a medium or object

Here given data is

Specific heat capacity = 0.90 J/gK

Temperature = 300. K to 350. K = 350 - 300 = 50 K

Mass =  24.0 grams

We have to calculate the heat = ?

Q =mCΔT

Q =  24.0 grams× 0.90×50 K

Q = 11.080 J

11.080 J  heat are absorbed to raise the temperature

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There are approximately 4.201 x 10^23 atoms in 0.6984 moles of silver.

First  we can use Avogadro's number, which is the number of particles atoms, molecules, etc. in one mole of a substance. Avogadro's number is approximately 6.022 x 10^23 particles per mole.

The number of atoms in a given number of moles of a substance is equal to the number of moles multiplied by Avogadro's number. So, to find the number of atoms in 0.6984 moles of silver, we can use the following equation:

Number of atoms = Number of moles x Avogadro's number

Number of atoms = 0.6984 moles x 6.022 x 10^23 atoms/mole

Number of atoms = 4.201 x 10^23 atoms

Therefore, there are approximately 4.201 x 10^23 atoms in 0.6984 moles of silver.

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Matter can be classified into four categories, namely elements, compounds, homogeneous mixtures, and heterogeneous mixtures.

1. Element: Examples include hydrogen, oxygen, and gold. These substances cannot be broken down into simpler substances through chemical means.

2. Compound: Examples include water (H2O), carbon dioxide (CO2), and table salt (NaCl). Compounds have a fixed ratio of elements and can be broken down into their constituent elements through chemical reactions.

3. Homogeneous mixture: Examples include air, saline solution, and brass. The components of these mixtures are evenly distributed and cannot be seen individually.

4. Heterogeneous mixture: Examples include sand and water, oil and water, and a bowl of cereal. The components of these mixtures are unevenly distributed and can often be seen individually. Remember that the classification of matter depends on its composition and properties.

In summary, the classification of matter as an element, compound, homogeneous mixture, or heterogeneous mixture depends on the composition and uniformity of the sample.

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Answer:

2.down is hypotheses and 23.across is experiment

Explanation:

akechis pancakes

Answer:

4 moles...................

Answer:

Temperature depends on the average kinetic energy of the particles in a sample. ... The fastest particles have the greatest mass. Most particles in the plasma are heavy and slow. The fastest particles transfer most of their energy through collisions

Answer:

C. Most particles in the plasma are heavy, slow, and very low density.

Explanation:

Correct on Edge 2022!!!

Good luck everyone, you got this! Have a great day!

Answer:

Explanation:

An element's atomic number defines the amount of protons an element may contain. The atomic number is usually the big number that is shown on top. Therefore, with 17 protons it will always be chlorine. 

The quantity of heat energy needed to raise the temperature of  \(1\)gram of a substance by  \(1\) degree Celsius is known as the substance's specific heat capacity. This material has a specific heat capacity of about \(0.180 J/(g^\circ C).\)

To determine the substance's specific heat capacity,

\(q = m \times c \times \delta T\)

where m denotes the substance's mass, c denotes its specific heat capacity, and T is the temperature change. Here, q denotes the amount of heat that is communicated.

The mass of the substance \((m = 2.2 g),\) the temperature change \((T = 80.0°C - 50.0°C = 30.0°C),\) and the heat energy communicated (q = 11.8 J) are all given in this problem.

When the formula contains these values,

\(11.8 J = 2.2 g \times c \times 30.0^\Circ\)

Solving for c, we get:

\(c = 11.8 J / (2.2 g \times 30.0°C)\)

\(c ≈ 0.180 J/(g°C)\)

Therefore, This material has a specific heat capacity of about \(0.180 J/(g^\circ C).\)

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Answer:

true

Explanation:

The molecular mass of the gas if 200 mL of gas weighs 0.344 grams at STP is 38.53g/mol. Details on how to calculate molecular mass can be found below.

The molecular mass of a gas can be calculated by using the following expression:

Molecular weight of the gas = mass × volume at STP (22.4L)/ volume of gas

= 0.344 × 22.4/0.2

= 7.7056/0.2

= 38.53g/mol

Therefore, the molecular mass of the gas if 200 mL of gas weighs 0.344 grams at STP is 38.53g/mol.

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The conjugate acid in the reaction given below is NH₄⁺ (option C).

Conjugate acid is any compound, of general formula HXn⁺, which can be transformed into a conjugate base X(n-1)⁺ by the loss of a proton.

According to this question, the following reaction occurs between ammonia and hydrochloric acid:

NH₃(g) + HCl(aq) → NH₄⁺(aq) + Cl⁻(aq)

Based on the above equation, HCl is a Brønsted-Lowry acid (donates a proton) while the ammonia is a Brønsted-Lowry base (accepts a proton). Also, Cl- is called the conjugate base of the acid and NH₄⁺ is called the conjugate acid of the base.

The complete equation described in question 21 is:

NH₃(g) + HCl(aq) → NH₄⁺(aq) + Cl⁻(aq)

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By eating half cooked meat

Answer:

Explanation:

During active transport, molecules move from an area of low concentration to an area of high concentration. This is the opposite of diffusion, and these molecules are said to flow against their concentration gradient.

Answer:

1.47 × 10^(23) molecules

Explanation:

According to the Gaussian distribution model, 8.8 x \(10^{11}\)\(cm^{-2}\) energy is required to design the implant setup.

A probabilistic model called a "Gaussian mixture model" posits that all of the data points were produced by combining a limited number of Gaussian distributions with unknown parameters.

First, the mean and covariance functions of a Gaussian distribution model are the only variables that matter. Due to the fact that just the first and second order moments of the process need to be specified, this attribute makes model fitting easier. Second, it's not too difficult to solve the prediction problem using Gaussian distribution model.

Given:

At z = 50nm

C (50nm) = 1 x \(10^{16} cm^{-3}\)

C (50nm) / Cp = 0.1

Calculations:

Using the Gaussian distribution model, the concentration as a function of depth can be related to peak concentration, Cp:

\(Cz = Cp * exp ( - \frac{(z - Rp)^2}{2\Delta R^2p} )\)

Taking log on both sides,

\(\sqrt{2ln10}\) = Rp – 0.05 / ΔRp = 2.416

To find an energy that gives Rp – 2.15 ΔRp = 0.05µm

(By trial and error method)

100 Kev Rp = 0.125, ΔRp = 0.035, Rp – 2.15 ΔRp = 0.048µm

120 Kev Rp = 0.15, ΔRp = 0.040, Rp – 2.15 ΔRp = 0.064µm

Interpolating linearly between 100 and 120 Kev gives about 103Kev.

At this energy, ΔRp = 0.035 µm

Therefore,

\(Q = \sqrt{2\pi } \Delta Rp Cp\) = 8.8 x \(10^{11}\)\(cm^{-2}\)

Result:

8.8 x \(10^{11}\)\(cm^{-2}\) energy is required.

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(i) The reagents of the reaction CH₃CH₂CH₂CH₂C=CH is being converted to CH₃CH₂CH₂CH₂C=CCH₂CH₃ required an alkene, a hydrogen source, and a catalyst.

(ii) The mechanistic steps are the catalyst activates the diimide by adsorbing it onto its surface, the activated diimide reacts with the alkene, and the intermediate alkyl radical reacts with another activated diimide molecule.

(iii) The explanation is the reaction is an example of alkene reduction, specifically diimide reduction.

In the given reaction, CH₃CH₂CH₂CH₂C=CH is being converted to CH₃CH₂CH₂CH₂C=CCH₂CH₃. This reaction involves the following components:

(i) The reagents: The reaction requires an alkene (CH₃CH₂CH₂CH₂C=CH), a hydrogen source, such as diimide (HN=NH), and a catalyst like palladium (Pd) on carbon.

(ii) Mechanistic steps:

1. The catalyst (Pd on carbon) activates the diimide (HN=NH) by adsorbing it onto its surface.

2. The activated diimide reacts with the alkene (CH₃CH₂CH₂CH₂C=CH), adding a hydrogen atom across the double bond to form the intermediate alkyl radical (CH₃CH₂CH₂CH₂C•CHCH₃).

3. The intermediate alkyl radical reacts with another activated diimide molecule, gaining another hydrogen atom and forming the final product, CH₃CH₂CH₂CH₂C=CCH₂CH₃.

(iii) Explanation: The reaction is an example of alkene reduction, specifically diimide reduction, where an alkene double bond is partially reduced to a single bond, yielding an alkane with a new carbon-carbon bond. The reaction proceeds via a radical mechanism with the help of a catalyst.

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Answer:

Heyaa!! Im Pinky and Im here to inform you that your answer is...

Explanation:

!!! 36.8189451 Grams !!!

  Have an amazing day!!!

~Pinky~!!

Answer:

False. Answer in pic above

In fact protons have no role in chemical reactions. The regrouping of atoms itself forms the new products in chemical reactions. The reactions involves the loss/gain or sharing of electrons.

A chemical reaction is a chemical change in which two or more atoms combine together to form a new product or a compound decomposes to form its constituent compounds. This  involves breaking or making of bonds.

In a chemical reaction, no change occurs in the nuclear composition but the valence electrons are involved in the reaction. Atoms loss or gain electrons or share valence electrons with other atoms to form ne compounds.

The electrostatic force of attraction or the overlapping of atomic orbitals make the new products in a chemical reaction. Hence, the statement is false.

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Answer:

1mole

Explanation:

The concentration of a substance is the amount of the solute present in a given quantity of solution. It is the number of moles of the solute in 1 L of the solution. Here the number of moles is 4.

One mole of a substance is defined as that quantity of it which contains as many entities as there are atoms exactly in 12 g of carbon - 12. The formula used to calculate the number of moles is:

Number of moles = Given mass / Molar mass

The equation connecting concentration, volume and the number of moles is:

n = C / V

n = Number of moles

C = Concentration

V = Volume

1L = 1000 mL

500 mL = 0.5 L

n = 2.0 / 0.5 = 4

Thus the number of moles is 4.

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V2 = 8.6 L

Explanation:

Given:

T1 = 293K. T2 = 314K

V1 = 8.0 L V2 = ?

Using Charles's law and solving for T2,

V1/T1 = V2/T2

V2 = (T2/T1)V1

= (314K/293K)(8.0 L)

= 8.6 L

Answer:

Electron configuration can be carried out in two steps which can be:

Sublevel notation

Shell notations.

In the sublevel notation, the sequence of filling electrons into the orbitals of the sublevels are guided by some principles:

the maximum number of electrons in the orbital of sublevels are two for s-sublevel, six for p-sublevel, ten for d-sublevel and fourteen for f-sublevel. This indicates that the maximum number of electrons in an orbital is two.

Aufbau's prinicple states that sublevel with lower energies are filled up before those with higher energies.

Pauli exclusion principle states that no two electrons in an atom can have the same set of the four quantum numbers.

Hund's rule states that electrons go into degenerate orbitals singly first before pairing occurs.

Using the shell notation, numbers are used to denote the sum of electrons in all orbitals each energy level.

For an atom of Be:

Sublevel notation for the 4 electrons 1s²2s²

Shell notation 2,2

Other representation is using the electron dot structure.

Speed of gas molecules would increase as temperature increases. This is because more energy is being supplied to the molecules, which allows them to move with more speed, increasing the chance of a successful collision (collision theory)

The average speed of gas molecules is directly related to the temperature of the gas.

The average kinetic energy of gas particles is proportional to the absolute temperature of the gas, and all gases at the same temperature have the same average kinetic energy.

The average speed of gas molecules is directly related to the temperature of the gas. This relationship implies that as the temperature of a gas increases, the average speed of its molecules also increases.

Thus, the average kinetic energy of the particles in a gas is proportional to the temperature of the gas. Because the mass of these particles is constant, the particles must move faster as the gas becomes warmer.

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The percent yield of \(Cl_2\) in the electrolytic decomposition of hydrogen chloride is 54.2%.

To calculate the percent yield of \(Cl_2\) in the electrolytic decomposition of hydrogen chloride, we need to compare the actual yield of \(Cl_2\) obtained to the theoretical yield of \(Cl_2\) that could have been obtained based on the amount of \(HCl\) used. The percent yield is then calculated as:

Percent yield = (actual yield / theoretical yield) x 100%

The balanced chemical equation for the electrolytic decomposition of \(HCl\) is:

2 \(HCl\)(aq) → 2 \(H2\)(g) + \(Cl_2\)(g)

The molar mass of \(HCl\) is 36.46 g/mol, and the molar mass of \(Cl_2\) is 70.90 g/mol. We can use the given mass of \(HCl\) to calculate the theoretical yield of \(Cl_2\):

moles of \(HCl\) = mass of \(HCl\) / molar mass of \(HCl\)

moles of \(HCl\) = 25.8 g / 36.46 g/mol

moles of \(HCl\) = 0.707 mol

According to the balanced equation, 1 mole of \(HCl\) produces 0.5 moles of \(Cl_2\). Therefore, the theoretical yield of \(Cl_2\) can be calculated as:

moles of \(Cl_2\) = 0.5 x moles of \(HCl\)

moles of \(Cl_2\) = 0.5 x 0.707 mol

moles of \(Cl_2\) = 0.354 mol

The theoretical yield of \(Cl_2\) in grams can be calculated by multiplying the moles of \(Cl_2\) by its molar mass:

theoretical yield of \(Cl_2\) = moles of \(Cl_2\) x molar mass of \(Cl_2\)

theoretical yield of \(Cl_2\) = 0.354 mol x 70.90 g/mol

theoretical yield of \(Cl_2\) = 25.11 g

The actual yield of \(Cl_2\) obtained from the experiment was 13.6 g.

Percent yield = (actual yield / theoretical yield) x 100%

Percent yield = (13.6 g / 25.11 g) x 100%

Percent yield = 54.2%

Therefore, the percent yield of \(Cl_2\) in the electrolytic decomposition of hydrogen chloride is 54.2%.

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Answer:

Design Shape

Explanation:

Answer:

2580 years

Explanation:

Since isotope Z has a half-life of 645 years, that means after 645 years, half of the original amount of isotope Z will decay. So, if 1/16 of the original amount is present, that means there have been 4 half-lives (since 2^4 = 16).

Each half-life is 645 years, so 4 half-lives is 4 x 645 = 2580 years.

Therefore, the age of the sample is 2580 years.