In the Brønsted–Lowry definition of acids and bases, a base __________​

Answer:

Explanation:

What would happen if a mixture of benzoic acid and cyclohexanol dissolved in CH2Cl2 is treated with aqueous NaOH solution?

Benzoic acid would dissolve in the aqueous layer while cyclohexanol would remain in the CH2Cl2 layer

The mixture Benzoic acid and cyclohexanol in solube in organic solvent CH2Cl2. Then add aqueous sodium hydroxide to the solution , so the Benzoic acid react with sodium hydroxide , it forms sodium benzoate , which is soluble in water (aqueous layer)

Where as the cyclohexanol  remain in the CH2Cl2 layer

Answer:

  1

Explanation:

Any relation with a repeated input value is not a function.

Table 1 has the input value 2 listed twice, so does not represent a function.

Answer:

thanks

Explanation:

thanks

Answer:

Kp = Kc (RT) ^(-2)

Explanation:

For the reaction;

N2 (g) + 3H2 ⇄ 2NH3(g)

We can write;

Kc = [NH3]^2/[N2] [H2]^3

But

Kp = pNH3^2/pN2 . PH2^3

To convert from Kc to Kp

Kp = Kc (RT) ^Δn

where Δn is the change in number of moles going from reactants

to products.

For this reaction;

Δn = 2- (3+1) = -2

Kp = Kc (RT) ^(-2)

Answer:

[1]. NO;        1.14 g,

[2]. N₂O₃;    1.71 g,

[3]. N₂O₅;    2.86 g.

Explanation:

[1]. For the first oxide, there is 46.69% of Nitrogen and [100 - 46.69%] of Oxygen, that is 53.31% of oxygen. The simplest whole-number ratio of N to O = [46.69/14.01] ÷ [53.31/ 16] = 3.33/3.33 = 1 : 1.

Hence, Nitrogen =1 and oxygen is 1, the compound = NO.

The number of grams of oxygen per 1.00 g of nitrogen for this compound is calculated as below:  

The number of grams of oxygen per 1.00 g of nitrogen for this compound = (1/ 0.4669) - 1 = 2.14 - 1 = 1.14 g.

[2]. For the second oxide, there is  36.85% of Nitrogen and [100 -  36.85%] of Oxygen, that is 63.15% of oxygen. The simplest whole-number ratio of N to O = [36.85/14.01] ÷ [63.15/ 16] = 2.63/3.94 = 1 : 1.5.

Hence, Nitrogen =1 and oxygen is 1.5. There is need to change it to whole number, therefore, when it is multiplied by 2, it gives 2:3. Therefore, the compound = N₂O₃.

The number of grams of oxygen per 1.00 g of nitrogen for this compound is calculated as below:  

The number of grams of oxygen per 1.00 g of nitrogen for this compound = (1/ 0.3685) - 1 = 2.71 - 1 = 1.71 g.

(3). For the third oxide, there is 25.94% of Nitrogen and [100 -  25.94%] of Oxygen, that is 74.06% of oxygen. The simplest whole-number ratio of N to O = [25.94/14.01] ÷ [74.06/ 16] = 1.85/4.63= 1 : 2.5.

Hence, Nitrogen =1 and oxygen is 2.5. There is need to change it to whole number, therefore, when it is multiplied by 2, it gives 2:3. Therefore, the compound = N₂O₅.

The number of grams of oxygen per 1.00 g of nitrogen for this compound is calculated as below:  

The number of grams of oxygen per 1.00 g of nitrogen for this compound = (1/ 0.2594) - 1 = 3.86 - 1 = 2.86 g

The energy of the photon of light can be obtained as 6.27 * 10^-20 J.

We know that a photon has to to do with a particular unit of light. We know that light can be said to be composed of very tiny corpuscles and these corpuscles of light is what we call the photon of the light.

We can be able to us the equation that is derived by Max Plank to be able to get the value of the energy of the photon of light. Now we know that a photon of light can have an energy that is able to be obtained by;

E = hf

h = Plank's constant

f = Frequency

Then;

E = 6.6 * 10^-34 Js * 9.5 * 10^13 Hz

= 6.27 * 10^-20 J

Thus as we can see from the parameters in the question, the energy of the photon is 6.27 * 10^-20 J.

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Answer: 4.5 moles

Explanation:

To understand how to solve this problem, you must understand the ratios written in this chemical equation.

The equation shows that 4 moles of Al forms 2 moles Al₂O₃. This creates the ratio 2:4 or \(\frac{2}{4}\)

To solve, you can set the two ratios to each other and cross multiply.

\(\frac{2}{4} = \frac{x}{9}\)

18 = 4x

x = 4.5 mol Al₂O₃

*both \(\frac{2}{4}\) and \(\frac{4.5}{9}\) can be simplified as \(\frac{1}{2}\), which verifies your answer*

The change in internal energy = 2.701 x 10² kJ

Given

Heat absorbed by system = 1.69 x 10² kJ

Work done on system = 1.011 x 10² kJ

Required

The change in Internal energy

Solution

We can use the first law of Thermodynamics :

\(\tt \Delta U=Q+W\)

The sign rules for heat and work are set as follows:  

• The system receives heat, Q +  

• The system releases heat, Q -  

• The system does work, W -  

• the system accepts work, W +  

Heat absorbed/receive heat from surrounding = Q+

Work done on the system = W+

and input the given values

\(\tt \Delta U= 1.69\times 10^2+1.011\times 10^2\\\\\Delta U=\boxed{\bold{2.701\times 10^2~kJ}}\)

The normal boiling point of the unknown liquid is 57.4°C.

The normal boiling point occurs when the vapor pressure of the liquid is equal to the atmospheric pressure. At normal boiling point, the temperature of the liquid is called the boiling point.

Using the Clausius-Clapeyron equation:

ln(P₂/P₁) = -(ΔHvap/R) * (1/T₂ - 1/T₁)

where P₁ is the vapor pressure at the given temperature T₁, P₂ is the vapor pressure at the boiling point temperature T₂, ΔHvap is the heat of vaporization, R is the gas constant.

At -170°C, the vapor pressure of the liquid is given as P₁ = 117 torr. At normal boiling point, the vapor pressure of the liquid is P₂ = 760 torr.

Converting all units to SI units, we have:

P₁ = 15.47 Pa

P₂ = 101325 Pa

ΔHvap = 5480 J/mol

R = 8.314 J/(mol*K)

Plugging in the values, we get:

㏑(101325/15.47) = -(5480/8.314) * (1/T₂ - 1/103.15)

Solving for T₂, the boiling point is found to be:

T₂ = 57.4°C

As a result, the unknown liquid's usual boiling point is 57.4°C.

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Answer:

copper - 52 (or Cu - 52)

⁵²Cu

Explanation:

Isotopes are different atoms of the same element that differ in the number of neutrons. Therefore, you can determine which element this is by examining the number of protons. All atoms with 29 protons are copper (Cu).

The mass number is the total number of protons and neutrons in an atom. Therefore, the mass number of this isotope is 52 (29 + 23 = 53). When writing an elemental symbol, the mass number is found on the top left.

As such, the name of this isotope is copper - 52 (or Cu - 52) and the symbol is ⁵²Cu.

The total kilojoules in two tablespoons is  836.8 kJ.

To determine the total kilojoules in two tablespoons of a substance, we need to know the specific substance and its energy content per tablespoon. Different substances have different energy values, so without this information, it is not possible to provide an accurate calculation.

The energy content of food or substances is typically measured in kilocalories (kcal) or kilojoules (kJ). 1 kilocalorie is equal to 4.184 kilojoules. The energy content of a substance is often listed on food labels or in nutritional databases.

For example, if we have the energy content of a substance as 100 kilocalories (kcal) per tablespoon, we can convert it to kilojoules by multiplying it by 4.184:

100 kcal * 4.184 kJ/kcal = 418.4 kJ

So, if we have two tablespoons of this substance, the total energy would be:

418.4 kJ/tablespoon * 2 tablespoons = 836.8 kJ

It's important to note that the energy content of a substance can vary depending on its composition, density, and other factors. Therefore, it is always recommended to refer to reliable sources such as food labels, nutritional databases, or consult a qualified professional to obtain accurate information regarding the energy content of specific substances.

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Answer:

c

Explanation:

Schrodinger's Quantum Mechanical Model, which is currently recognised by modern science, is the electron model. The electron cloud model is another name for this one.

The term "electron cloud" refers to the current atomic structure model. A physicist from Austria named Edwin Schrodinger argued that electrons do not follow static or permanent trajectories.

The contemporary atomic model, often known as the cloud model, depicts atoms as having a nucleus made up of protons and neutrons and a diffuse gradient or cloud surrounding it that is made up of electrons. Because electron activity is probabilistic, electrons are often depicted as clouds.

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Answer:

They all have a certain amount of protons electrons and neutrons.

The balanced chemical equations of the reactions are given below:

1. Mg (s) + 2 H₂O (l) ----> Mg(OH)₂ (s) + H₂ (g)

2. 2 Li (s) +  2 H₂O (l) ----> LiOH (aq) + H₂ (g)

A balanced chemical equation is an equation in which the number of moles of atoms of elements in a given reaction is equal to the sum of the number of moles of atoms of each element that is produced.

A balanced chemical equation is in accordance with the law of conservation of mass which states that matter can neither be created nor destroyed.

When balancing chemical equations, numerical coefficients are added in front of moles of atoms of an element or moles of a given compound taking part in the reaction.

The balanced chemical equation of the reaction of magnesium and water as well as the reaction of lithium and water is given below:

Magnesium and water:

Mg (s) + 2 H₂O (l) ----> Mg(OH)₂ (s) + H₂ (g)

Lithium and water:

2 Li (s) +  2 H₂O (l) ----> LiOH (aq) + H₂ (g)

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The balanced molecular equation for the reaction between sodium hydroxide (NaOH) and aluminum chloride (\(AlCl_3\)) in aqueous solution can be written as follows: 2NaOH(aq) + 3\(AlCl_3\)(aq) → 3NaCl(aq) + \(Al(OH)_3\)(s)

In this reaction, sodium hydroxide (NaOH) reacts with aluminum chloride (\(AlCl_3\)) to form sodium chloride (NaCl) and aluminum hydroxide (\(Al(OH)_3\)). The coefficients in the balanced equation indicate the stoichiometric ratio between the reactants and products.

The physical states of the substances are indicated by the symbols (aq) for aqueous solutions and (s) for the solid precipitate.

The reaction is a double-displacement reaction, also known as a precipitation reaction. Double-displacement reactions involve the exchange of ions between two compounds, resulting in the formation of a precipitate.

In this case, sodium hydroxide and aluminum chloride react to form sodium chloride and aluminum hydroxide, with aluminum hydroxide being the white solid precipitate.

It's worth noting that the actual reaction might involve hydrated forms of the compounds, such as NaOH·x\(H_2O\) and \(AlCl_3\)·y\(H_2O\). However, for simplicity, these hydrated forms are not included in the balanced equation.

Overall, the balanced equation represents the chemical reaction between sodium hydroxide and aluminum chloride, showing the reactants, products, and their stoichiometric ratios.

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Answer:

4909 miles per hour

Explanation:

7900 kilometers converted into miles is 4909

The reaction order and specific reaction rate constant can be determined by performing the kinetics experiment on irreversible polymerization A. Kinetic experiments can be used to investigate the rate and mechanism of chemical reactions. Chemical kinetics is the study of chemical reactions' speed and pathway.

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Answer:

978.19° C

Explanation:

P1V1/T1 =P2V2/T2     Since the pressure is constant, this can be written as

V1/T1 = V2/T2      RE-ARRANGE TO

V2 *  T1/V1   = T2       Note:  T must be in Kelvin!!

1.5 L  *  (273.15 + 23)  / (.355 L ) = T2 = 1251.338 K  =978.19 C

Answer:

3. d

4. c

5. i

6. h

7. a

8. g

9. j

10. b

11. e

12. f

Explanation:

Answer: its D 12 grams

Explanation: you just have to find the molar mass of carbon in the periodic table

Answer:

it is 78.15 Kelvins

Explanation:

-319 Fahrenheit to 78.15 Kelvins

Answer:

\(M_{acid}=0.0444M\)

Explanation:

Hello,

In this case, for the given reaction:

\(H _2 S O _4 + 2 N a O H \rightarrow 2 _H 2 O + N a _2 S O_ 4\)

We find a 1:2 molar ratio between the acid and the base respectively, for that reason, at the equivalence point we find:

\(2*n_{acid}=n_{base}\)

That in terms of concentrations and volumes we can compute the concentration of the acid solution:

\(2*M_{acid}V_{acid}=M_{base}V_{base}\\\\M_{acid}=\frac{M_{base}V_{base}}{2*V_{acid}}=\frac{0.697M*28.07mL}{2*220.1mL}\\ \\M_{acid}=0.0444M\)

Best regards.

The concentration of the sulfuric acid solution (H₂SO₄) is 0.0444 M

From the question,

We are to determine the concentration of the H₂SO₄ solution

Using the titration formula

\(\frac{C_{A}V_{A} }{C_{B}V_{B}} = \frac{n_{A}}{n_{B}}\)

Where

\(C_{A}\) is the concentration of acid

\(C_{B}\) is the concentration of base

\(V_{A}\) is the volume of acid

\(V_{B}\) is the volume of base

\(n_{A}\) is the mole ratio of acid

and \(n_{B}\) is the mole ratio of base

The given balanced chemical equation for the reaction is

H₂SO₄ + 2NaOH ⟶ 2H₂O + Na₂SO₄

∴ \(n_{A} = 1\)

and \(n_{B} = 2\)

From the given information

\(V_{A} = 220.1 \ mL\)

\(C_{B} = 0.697 \ M\)

\(V_{B} = 28.07 \ mL\)

Putting the parameters into the equation, we get

\(\frac{C_{A} \times 220.1}{0.697 \times 28.07}= \frac{1}{2}\)

∴ \(C_{A} = \frac{1 \times 0.697 \times28.07}{2\times 220.1}\)

\(C_{A} = \frac{19.56479}{440.2}\)

\(C_{A} = 0.0444 \ M\)

Hence, the concentration of the sulfuric acid solution (H₂SO₄) is 0.0444 M

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Answer:

No, it is not naturally occuring because it is man-made.

Answer:

Hope this helps ;) don't forget to rate this answer !

Explanation:

To find the number of moles of Cr(NO3)3 in the sample, we need to determine the number of moles of each element present in the compound.

The chemical formula for Cr(NO3)3 tells us that for every 1 mole of Cr(NO3)3, there is 1 mole of chromium (Cr), 3 moles of nitrogen (N), and 9 moles of oxygen (O).

We are given that the sample contains 8.36 moles of oxygen. Since the ratio of oxygen to Cr(NO3)3 is 9:1, the number of moles of Cr(NO3)3 in the sample is 8.36 moles O / 9 moles O/mole Cr(NO3)3 = 0.93 moles Cr(NO3)3.

Rounded to 3 significant figures, the answer is 0.93 moles Cr(NO3)3.

Answer:

\(m_X=128.44 a.m.u\)

Explanation:

Hello there!

In this case, since the average atomic mass of an element, when given the atomic mass and the percent abundance of the naturally occurring isotopes is computed as shown below for this unknown element:

\(m_X=126*0.22+128*0.34+130*0.44\)

Whereas the atomic mass of each isotope is multiplied by the percent abundancy; we obtain:

\(m_X=128.44 a.m.u\)

Best regards!

Considering the definition of atomic mass, isotopes and atomic mass of an element, the atomic mass of the element is 128.44 amu.

First of all, the atomic mass (A) is obtained by adding the number of protons and neutrons in a given nucleus of a chemical element.

The same chemical element can be made up of different atoms, that is, their atomic numbers are the same, but the number of neutrons is different. These atoms are called isotopes of the element.

On the other hand, the atomic mass of an element is the weighted average mass of its natural isotopes. In other words, the atomic masses of chemical elements are usually calculated as the weighted average of the masses of the different isotopes of each element, taking into account the relative abundance of each of them.

In this case, you know:

Then, the average mass of lithium can be calculated as:

126 amu×0.22 + 128 amu×0.34 + 130 amu×0.44= 128.44 amu

Finally, the atomic mass of the element is 128.44 amu.

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Answer:

Solid aluminum oxide and solid iron

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