Please answer it!! Would appreciate it!

Answer:

Simple distillation for salt and water

Explanation:

Using the change of base rule to find the logarithm to four decimal places. the correct answer is 11.4235.

To find the logarithm of 143.2 using the change of base rule, we can choose any base we prefer. Let's use base 10 and natural logarithm (base e) for this calculation.

First, we'll use the change of base formula, which states that log(base b) x = log(base c) x / log(base c) b. In this case, we'll calculate log(base 10) 143.2.

We'll use the natural logarithm (ln) as our intermediary step. The natural logarithm of 143.2 can be calculated as ln(143.2).

Using a calculator, we find that ln(143.2) is approximately 4.9628.

Next, we need to calculate log(base 10) e, which is the logarithm of e with base 10. Using a calculator, we find log(base 10) e is approximately 0.4343.

Finally, we apply the change of base formula:

log(base 10) 143.2 ≈ ln(143.2) / log(base 10) e
                ≈ 4.9628 / 0.4343
                ≈ 11.4235

Rounding to four decimal places, the logarithm of 143.2 using base 10 is approximately 11.4235.

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For instance, starch typically contains 300–600 separate units of sugar, but only one of those units (the terminal) contains a hemiacetal. It takes more than one hemiacetal to pass a test for sugars.

The carbon atom in the acetal molecule is joined to two OR (ether) groups, one group of R, and one group of H. A carbon atom is joined with one OR (ether) group with a solitary R and H groups with a noncovalent OH group to form the hemiacetal molecule.

Consequently, a tetrahedral intermediate form is a lowering sugar. In contrast, acetal derivatives (glycosides) are not considered reducing sugars since they maintain their acetal linkage when a base is present and do not undergo aldehyde or hemiacetal conversion. Since alcohols are poor nucleophiles, protonation of the carboxyl group typically facilitates the attack just on carbonyl carbon.

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Answer:

The balanced chemical equation for the reaction between hydrochloric acid (HCl) and sodium sulfate (Na2SO4) is:

2 HCl + Na2SO4 → 2 NaCl + H2SO4

This equation shows that two moles of hydrochloric acid react with one mole of sodium sulfate to produce one mole of sulfuric acid. Therefore, we need to first calculate the number of moles of sodium sulfate that react with the given mass of hydrochloric acid, and then use the mole ratio to find the number of moles (and mass) of sulfuric acid produced.

Calculate the number of moles of sodium sulfate:

molar mass of Na2SO4 = 2(23.0 g/mol) + 1(32.1 g/mol) + 4(16.0 g/mol) = 142.1 g/mol

moles of Na2SO4 = mass/molar mass = 13.7 g/142.1 g/mol = 0.0965 mol

Use the mole ratio to find the number of moles of sulfuric acid produced:

From the balanced equation, we see that 2 moles of HCl react with 1 mole of Na2SO4 to produce 1 mole of H2SO4.

So, the number of moles of H2SO4 produced = (0.0965 mol Na2SO4) x (1 mol H2SO4 / 1 mol Na2SO4) = 0.0965 mol H2SO4

Calculate the mass of sulfuric acid produced:

molar mass of H2SO4 = 1(2.0 g/mol) + 1(32.1 g/mol) + 4(16.0 g/mol) = 98.1 g/mol

mass of H2SO4 = moles x molar mass = 0.0965 mol x 98.1 g/mol = 9.50 g

Therefore, 9.50 grams of sulfuric acid are produced when hydrochloric acid reacts with 13.7 grams of sodium sulfate.

Molar mass of N2 = 14×2=28g/mol

Moles of N2 =mass/molar mass

Mass of N2 = moles × molar mass

Mass of N2 = 15.7 × 28 = 439.6 kg

The element that CANNOT be extracted directly from air is chlorine. This is the answer to the given question.

Air is a mixture of gases that are essential to sustain life. It is made up of nitrogen, oxygen, argon, carbon dioxide, neon, helium, and many other elements. There are several methods that are used to extract elements from the air.

However, not all elements can be extracted directly from air. This is because some elements are more reactive than others and they cannot be separated by simple techniques. For example, chlorine is a reactive element and cannot be extracted directly from air. It has to be prepared by chemical methods.

Chlorine is a chemical element that has the symbol Cl and the atomic number 17. It is a halogen and is located in group 17 of the periodic table. It is a yellow-green gas that is highly reactive and is used in the production of various chemicals.

Chlorine is also used to purify water and to sanitize swimming pools and other water bodies. It has a pungent odor and can be toxic if inhaled in large quantities. Chlorine is extracted from brine by the electrolysis of sodium chloride.

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To calculate the Ksp (solubility product constant) from the solubility of a compound, you need to follow these steps:

1. Write the balanced equation for the dissolution of the compound in water.
2. Identify the stoichiometry of the dissolved compound and the ions produced in the solution.
3. Write the expression for the Ksp using the stoichiometry of the ions and their concentration in the solution.
4. Use the solubility of the compound in water to calculate the concentration of the ions in the solution.
5. Substitute the ion concentrations into the Ksp expression and solve for the Ksp value.

For example, let's consider the dissolution of silver chloride (AgCl) in water:
AgCl(s) ⇌ Ag+(aq) + Cl-(aq)
The stoichiometry of the reaction tells us that one mole of AgCl produces one mole of Ag+ and one mole of Cl-. The Ksp expression for this reaction is:

Ksp = [Ag+][Cl-]
If we know that the solubility of AgCl in water is 1.2 x 10^-5 M, we can use this value to calculate the concentration of Ag+ and Cl- in the solution:
[Ag+] = [Cl-] = 1.2 x 10^-5 M
Substituting these values into the Ksp expression, we get:
Ksp = (1.2 x 10^-5)^2 = 1.44 x 10^-10

Therefore, the Ksp value for AgCl in water is 1.44 x 10^-10.

To calculate Ksp (solubility product constant) from solubility, follow these steps:
1. Write the balanced dissolution reaction: For the compound AB, the reaction would be AB(s) ↔ A⁺(aq) + B⁻(aq).
2. Determine the solubility: The solubility represents the concentration of the dissolved ions in a saturated solution, typically expressed in mol/L (molarity).
3. Set up the expression for Ksp: Ksp = [A⁺][B⁻], where [A⁺] and [B⁻] are the molar concentrations of the ions A⁺ and B⁻ in the saturated solution.
4. Calculate the Ksp: Plug in the solubility values you found in step 2 into the Ksp expression and solve for Ksp.
Remember that these steps are a general guideline and the actual calculation may differ depending on the specific compound and reaction being considered.

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Answer:

No reaction is observed

Explanation:

The activation energy is the minimum energy that reactants must have in order to cross the energy barrier and become converted into products.

When reactant molecules do not possess the required activation energy, collision between the reactant molecules becomes purely elastic and no reaction occurs.

Hence, colliding reactant molecules are only converted into product molecules when they possess the required activation energy.

The wavelength of blue light is 0.00000045 m. This wavelength in scientific notation is 4.5 × 10⁻⁷m.

A waveform signal that is carried in space or down a wire has a wavelength, which is the separation between two identical places adjacent crests in the consecutive cycles.

A spectrum is the term used to describe the range of wavelengths or frequencies for wave phenomena. The term was originally used to describe the electromagnetic spectrum, but it is now used to describe the sound spectrum and vibration spectrum.

The wavelength, which will also apply to troughs, is the separation between two wave crests. The frequency is measured in cycles per second and represents the number of vibrations that pass over a certain area in one second (Hz).

Thus,  This wavelength in scientific notation is 4.5 × 10⁻⁷m.

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Answer:

by determining or looking up the electron configurations of the main group elements.

Explanation:

The valence electrons participate in chemical reactions. ... You can also find the core and valence electrons by determining or looking up the electron configurations of the main group elements.

ethylene glycol(CH2OH-CH2OH) is a liquid at room temperature and is soluble in water in all proportions; it is the liquid used in car radiators as antifreeze.

Ethylene effects include: fruit ripening, induction of flowering, loss of chlorophyll, abortion of plant parts, stem shortening, abscission (dropping) of plant parts, epinasty (stems bend), and dormancy. It can be produced when plants are injured, either mechanically or by disease.

Ethylene has historically been made from petroleum, but the production has been transitioning to using natural gas. The principal method of producing ethylene is steam cracking, a process which breaks down hydrocarbons through the refining of petroleum or natural gas.

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The sequence of amino acid residues in a protein is considered primary structure and is always read from the N-terminal end of protein.

The food we eat chiefly consists of three nutrients namely carbohydrates, proteins and fats.

Proteins are the most abundant among the bio molecules present in the living organisms.

The word protein is derived from Greek word, “proteios” which means primary or of prime importance.

The proteins are the polymers of amino acids.

The structure of amino acid consists of a carbon atom surrounded by four functional groups i.e, Carboxyl(COOH) group, the Amino(NH2) group, hydrogen(H) and an alkyl group(R).

In a protein, amino acids are linked to each other by peptide bonds which are formed between the COOH group of one amino acid and the NH2 group of another amino acid, as shown in the adjoining image.

In primary structure, the amino acids are joined to each other in a linear manner without any branching, as shown in the given diagram.

Hence, the sequence of amino acid residues in a protein is considered primary structure and is always read from the N-terminal end of protein.

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Answer:

12 - x = 20 - 5x

Add 5x on both sides,

12 - x + 5x = 20 - 5x

12 + 4x = 20

Subtract 12 on both sides,

12 - 12 + 4x = 20 - 12

4x = 8

Divide 4 on both sides,

4x / 4 = 8 / 4

x = 2

Hence proved.

For the central atoms in the molecule labeled as CH3 and OCH3, the geometry around each central atom is tetrahedral.

Regarding 12(c), to determine whether the overall molecule is polar or nonpolar, we need to consider the bond polarities and the molecular shape. If the bond polarities cancel each other out due to symmetry, then the molecule is nonpolar. If the bond polarities do not cancel each other out, then the molecule is polar.

Unfortunately, the bond polarities and shape of the molecule are not provided, so I cannot determine whether the molecule is polar or nonpolar and show the direction of molecular polarity.

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Answer:

2=2.28*10^5

3=3.98*10^3

4=5.76*10^3

Answer:

The nonpolar covalent compounds are:

H2O (polar covalent)

NCl3 (polar covalent)

AuCl3 (ionic)

ClO2 (polar covalent)

SF4 (polar covalent)

SO3 (nonpolar covalent)

Answer: Sodium Nitrate solution is neutral.

Explanation: Sodium nitrate solution has strong bases and strong acids so it would have a neutral pH of 7.

Total, -920 kJ of heat would be released when 54.0 grams of glucose is burned.

To determine the amount of heat released when 54.0 grams of glucose is burned, we need to know the heat of combustion or the heat of reaction for the combustion of glucose.

The balanced equation for the combustion of glucose (C₆H₁₂O₆) is;

C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O

To calculate the heat released, we need the molar mass of glucose and the heat of combustion per mole of glucose.

The molar mass of glucose (C₆H₁₂O₆) is;

(6 × atomic mass of carbon) + (12 × atomic mass of hydrogen) + (6 × atomic mass of oxygen)

= (6 × 12.01 g/mol) + (12 × 1.01 g/mol) + (6 × 16.00 g/mol)

= 180.18 g/mol

Next, we need to find the heat of combustion per mole of glucose. The heat of combustion of glucose is approximately -2800 kJ/mol.

Now we can set up the calculation;

54.0 g of glucose × (1 mol / 180.18 g) × (-2800 kJ/mol) = -920 kJ

The negative sign indicates that heat is being released during the combustion process. Therefore, approximately 920 kJ of heat would be released when 54.0 grams of glucose is burned.

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5.625 moles of CO₂ are produced from the combustion of 90.0 g of methane (CH₄).

The chemical reaction equation CH₄ + 2O₂ → CO₂ + 2H₂O represents the combustion of methane (CH₄). In this reaction, methane reacts with oxygen to produce carbon dioxide (CO₂) and water (H₂O).

To determine the number of moles of CO₂ produced from the combustion of 90.0 g of methane (CH₄), we need to use the mole ratio between CH₄ and CO₂ in the balanced equation:

CH₄ + 2O₂ → CO₂ + 2H₂O

1 mol of CH₄ reacts with 1 mol of CO₂. Hence, 16 g of CH₄ reacts with 44 g of CO₂ (molar mass of CH₄ = 16 g/mol; molar mass of CO₂ = 44 g/mol).

Now we can use this ratio to calculate the moles of CO₂ produced from 90 g of CH₄. We first convert 90 g of CH₄ to moles:

90 g CH₄ x (1 mol CH₄/16 g CH₄) = 5.625 mol CH₄

We can then use the mole ratio to find the number of moles of CO₂:

5.625 mol CH₄ x (1 mol CO₂/1 mol CH₄) = 5.625 mol CO₂

Therefore, 5.625 moles of CO₂ are produced from the combustion of 90.0 g of methane (CH₄).

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Answer:

Na - 1 away from neon

Li - 1 away from helium

K - 1 away from argon

Cs - 1 away from xenon

Explanation:

We see this trend as group 1A elements are 1 away from noble gases and hence, have a valency of 1

Answer: Neutral

Explanation: This is because, in the ph scale, greater than 7 indicates base or alkaline (basic), while less than 7 indicates that it is acidic.

The temperature of mixed water is 45.230C under the conditions stated.

T(final) = (m1 T1 + m2 T2) / (m1 + m2), at which m1 and m2 are indeed the weight training of the water in the initial and 2nd canisters, T1 is the water temperature in the first container, and T2 is the water temperature in the second container, can be used to determine the final the water's temperature mixture.

The given parameters;

mass of the cold water, m = 100 g

initial temperature of the water, t₁ = 22.6 ⁰C

initial temperature of the hot water, t₂ = 75.4⁰ C

75 g is the hot water's mass.

specific heat capacity of water is 4.184 J/g⁰C

The mixture's final temperature is estimated as follows;

Based on the principle of conservation of energy;

Heat received by the ice water equals heat lost by the hot water.

mcΔθ₂ = mcΔθ₁

75 x 4.184 x (75.4 - T) = 100 x 4.184 x (T - 22.6)

75 x (75.4 - T) = 100 x (T - 22.6)

(75.4 - T) = 1.333(T - 22.6)

75.4 - T = 1.333T - 30.1258

75.4 + 30.1258 = 1.333T + T

105.5258 = 2.333T

T = 45.2318⁰C

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Deprotonation of phenol by NaOHPhenol is a weak acid with a pKa value of 10, so it is not very acidic but it can be deprotonated with a strong base like sodium hydroxide (NaOH). The mechanism for this reaction is a simple acid-base reaction where NaOH acts as a base and removes the proton (H+) from phenol.

The curved arrow mechanism is shown below:Here, the Na+ ion comes in and removes the H+ ion from the O-H bond in phenol and forms water as a by-product. The major organic product is phenoxide ion (C6H5O−) which is formed after the deprotonation reaction.SN2 reaction of phenoxide with chloroethane Phenoxide ion is a good nucleophile because it has a negative charge on the oxygen atom which is able to attack the positively charged carbon atom in chloroethane. The mechanism for this reaction is a nucleophilic substitution (SN2) reaction where the phenoxide ion acts as a nucleophile and replaces the chloride ion in chloroethane. The curved arrow mechanism is shown below:Here, the phenoxide ion attacks the carbon atom in chloroethane, and the chloride ion leaves as a leaving group. The major organic product is ethyl phenyl ether (C6H5OC2H5) which is formed after the SN2 reaction.

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Calcium bromide give a compound consisting of two bromine atoms and one calcium atom.

What is atom?

An atom is a particle of the  matter that uniquely defined as a chemical element. An atom is the  consists of a central nucleus that is the  surrounded by one or more negatively charged of  electrons. The nucleus is the  positively charged and the  contains one or more of  relatively heavy particles known as protons and neutrons. Sol-Atomic radius of an atom is defined as the total distance from the nucleus to the outermost shell of the atom. Sodium and magnesium are located in the same era, with magnesium to the right of sodium. They both have the same number of primary shells.

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Answer:

Not sure, but I think ot is chemical bonds because chemical potential energy are stored energy in a chemical bond. Hope this helps, thank you !!