Chlorine has an atomic number of 17. How many protons are in
the nucleus of a chlorine atom?

Answer:

B

Explanation:

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Answer:

Gas exchange takes place in the millions of alveoli in the lungs and the capillaries that envelop them. As shown below, inhaled oxygen moves from the alveoli to the blood in the capillaries, and carbon dioxide moves from the blood in the capillaries to the air in the alveoli.

Explanation:

Answer:

Warmer air can hold more water vapor than colder air.

Explanation:

Weather can be defined as the atmospheric conditions of a particular area over a short period of time.

The elements of weather include precipitation, wind, temperature, atmospheric pressure, relative humidity, cloud, and wind speed.

Temperature can be defined as a measure of the degree of coldness or hotness of a physical object (body).

On the other hand, humidity refers to the concentration (amount) of water vapor that is present in the air. It is high when there's a lot of water vapor in the air and low when the level of water vapor is small.

The relationship between air temperature and humidity is that warmer air can hold more water vapor than colder air because as the air cools, its molecules move closer together while the molecules move farther apart as the air become hot.

Additionally, at constant humidity, relative humidity is inversely proportional to temperature i.e as the temperature decreases, relative humidity increases.

To find the correct number significant digits, learn the concentration and initial rate.

What is concentration?

In chemistry and related fields, the idea of concentration is used frequently. It is a way to gauge how much of one substance is incorporated into another.

What is initial rate?

When a reaction first begins, or when t = 0, its initial rate is the rate that exists at that precise moment. At time zero (t), the slope of the reactant concentration versus the time curve is equal to the initial rate.

Rak=k(H₂) (NH₃) Rak law expression

1. reaction order w.r.t H₂ is ⇒2

2. reaction order w.r.t  NH₃ is⇒ 1.

3. overall order 2+1=3 ( bird order reaction)

4. k(H₂) (NH₃)= 0.740⇒ 1

H₂ is doubled ⇒ r₂=k(H₂) (NH₃)=4k(H₂) (NH₃)⇒2

(2)/(1) = r₂/r₁ = 4k(H₂) (NH₃)/k(H₂) (NH₃)=4

r₂= 4∝ r₁ = 4∝ 0.740=2.96m/s

5. r= 6.0∝ 10^⁴m/s, (H₂)= 0.98m, (NH₃)= 0.31m

r=k(H₂) (NH₃)

k=r/(H₂) (NH₃)= 6.0 ∝ 10^⁴/(0.98)^²(0.31)=201528.93m^⁻²s^⁻¹

K=2.0 ∝ 10^5m^⁻²s^⁻¹

Therefore, the significant digit is K=2.0 ∝ 10^5m^⁻²s^⁻¹

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Here's the Answer !

Atomic number = no. of electrons = no. of protons, therefore :

and mass number = no. of protons + no. of neutrons

so,

A net ionic equation describing the total reaction between sodium hydroxide and phosphoric acid (h3po4) in aqueous solutions.

H3PO4(aq) → Na3PO4(aq) + 3H2O(l)

To write the net ionic equation, we need to first write the balanced ionic equation, which shows all the ions in solution that participate in the reaction. The ionic equation for the reaction is:

3Na+(aq) + 3OH-(aq) + H3PO4(aq) → Na3PO4(aq) + 3H2O(l)

Next, we cancel out the spectator ions, which are the ions that appear on both sides of the equation and do not participate in the reaction. In this case, the spectator ions are the sodium ions (Na+) and the hydroxide ions (OH-). The net ionic equation is then:

H3PO4(aq) → Na3PO4(aq) + 3H2O(l)

This equation shows the actual chemical change that occurs in the reaction, which is the transfer of a proton (H+) from the phosphoric acid to the hydroxide ion, forming water and the phosphate ion.

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A nation's economic development without compromising the environment's quality for future generations is known as sustainable development. Tourism is an industry in which that addresses the needs of visitors, and the host communities and takes into account all its current and future economic, social, and environmental impacts.

Biodiversity conservation, not polluting, and treating workers and local communities with respect, the hospitality industry work with go hand in hand with the environment and be aware of its social and economic impact. Neoliberalism has been connected to the privatization of state-claimed, or normal property assets like backwoods, water, and biodiversity; environmental services in public expenditures for environmental management and deregulation contributing to sustainable development.

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The relationship between the enthalpy (ΔH) and entropy (ΔS) of a reaction that is never spontaneous is -ΔH, +ΔS option - B is correct answer.

When a reaction occurs spontaneously, the system doesn't require any additional energy input because the change in free energy is negative.

When the enthalpy change is negative and the entropy change is positive, the reaction is always spontaneous.

The free energy change is always positive and the reaction is never spontaneous if the reaction is endothermic (H positive) and the entropy change S is negative (less disorder).

Although a spontaneous reaction may result in an increase or decrease in entropy or enthalpy, it will always result in a decrease in free energy, which is a negative G.

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Condensation reaction is a chemical reaction where two molecules combine to form a larger molecule, releasing a small molecule. This process is crucial for the synthesis of biopolymers, complex carbohydrates, fatty acids, and lipids, as well as the formation of proteins and nucleic acids.

The reaction that produces large molecules by linking small molecules is known as a condensation reaction. A condensation reaction, also known as dehydration synthesis, is a type of chemical reaction that occurs when two molecules react to form a single molecule, with the loss of a small molecule like water. It is a process in which two molecules combine to form a larger molecule, and in the process, a small molecule is released.

A reaction occurs when a small molecule, such as water, is lost from two different molecules, allowing the molecules to combine to form a new and larger molecule. When the reaction takes place, the smaller molecules are combined to form larger molecules by losing small molecules such as water, ammonia, and hydrogen chloride. In other words, a condensation reaction is a reaction in which molecules combine to form larger molecules, resulting in the removal of a small molecule such as water or methane.

In the process of condensation reaction, content loaded that are composed of numerous small molecules are combined to create large molecules, such as the combination of amino acids to form proteins or the linking of nucleotides to form DNA. In other words, it is the reverse of hydrolysis, where water is added to break down complex molecules into smaller ones. The process of condensation reaction plays an essential role in the synthesis of biopolymers such as proteins and nucleic acids, as well as the formation of complex carbohydrates, fatty acids, and lipids.

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We can see here that when compared to sulfuric acid, carboxylic acids are weaker acids.

Sulfuric acid is a strong, highly corrosive acid with the chemical formula \(H_{2} SO_{4}\). It is one of the most important and widely used industrial chemicals. Sulfuric acid is known for its strong acidic properties and is often referred to as the "king of chemicals" due to its widespread applications in various industries.

Sulfuric acid is a dense, oily liquid that is colorless when pure. It is soluble in water, and when dissolved, it releases hydrogen ions (H+) to make the solution highly acidic.

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Tax returns submitted manually have such a 20% chance of being inaccurate, whereas those submitted electronically have such a 0.05% probability.

The movement of data or information via a recognized electronic data interchange system, such as computer networks and modems, is referred to as "electronic transmission." Physical documents are represented by digital records (even if they originated in digital format)

The movement of data or information via a recognized electronic data interchange system, such as computer networks and modems, is referred to as "electronic transmission."

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Answer:

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Explanation:

A equals 6.8 and C is the final answer of the equation so you would subtract the answer from a which gives you 2.6 grams

The compound that will contain the most polar bond is D. chloroethane, H3CCH2Cl. This is because the bond between the carbon and chlorine atoms is more polar than the bonds between the carbon and hydrogen atoms in the other compounds. The polarity of a bond is determined by the difference in electronegativity between the atoms involved in the bond. Chlorine has a higher electronegativity than carbon, so the bond between them will be more polar. The other compounds listed have bonds between carbon and hydrogen atoms, which have a smaller difference in electronegativity and are therefore less polar.

The pH at the equivalence point is 7.0, as the reaction between the acid and puradine produces a neutral solution. To calculate the pH at each volume of added acid, you can use the equation pH = -log[H+].

At the start of the titration, before any acid is added, the pH can be calculated using the initial concentration of the puradine solution, which is 0.125 M.

pH = -log(0.125) = 0.903

As acid is added, the concentration of H+ ions increases, leading to a decrease in pH. The volume of acid required to reach the equivalence point can be calculated using the formula:

Macid x Vacid = Mpura x Vpura

Where Macid and Mpura are the molarities of the acid and puradine solutions, respectively, and Vacid and Vpura are the volumes of acid and puradine solutions used.

Once the equivalence point is reached, any additional acid added will lead to a sharp decrease in pH. The pH at the equivalence point is 7.0, as the reaction between the acid and puradine produces a neutral solution.

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A protein mixture is commonly applied to a HIC column under high salt conditions, and the protein of interest is eluted with a buffer of decreasing ionic strength.

Structured salts added to the equilibration buffer and sample promote ligand-protein interactions in HIC. The amount of bound protein decreases as the salt concentration decreases, as does the risk of protein precipitation at lower ionic strength.

Despite the fact that sodium, potassium, or ammonium sulfates have a higher precipitation effect, these salts effectively promote ligand-protein interactions in HIC. Most bound proteins are eluted by washing with water or a dilute buffer with a pH close to neutral.

What exactly is HIC?

Hydrophobic interaction chromatography (HIC) is a technique used to separate molecules based on their hydrophobicity. HIC is a useful separation technique for purifying proteins while retaining biological activity due to the use of less denaturing conditions and matrices.

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When sodium sulfate reacts with carbon, then carbon dioxide and sodium sulfide are formed. When 5 gm of sodium sulfate reacts then 0.854 gms of carbon is consumed.

A stoichiometry balanced equation is the use of the reaction to calculate the moles and the mass of the reactant consumed or the products produced.

The balanced chemical reaction:

1 Na₂SO₄ + 2 C → Na₂S + 2 CO₂

1 mole of sodium sulfate requires 2 moles of carbon to produce 1 mole and 2 moles of sodium sulfide and carbon dioxide respectively.

The molar mass of sodium sulfate = 142.05 gm

Two moles of carbon weigh = 24.02 gms

If 1 mole combines with 2 moles of carbon then 142.05 gms reacts with 24.02 gms of carbon. Hence, 5.00 gm reacts to:

(5 × 24.02) ÷ 142.05 = 0.845 gms

Therefore, 0.845 gms of carbon is used by 5 gms of sodium sulfate.

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Answer:

Permanent

Explanation:

I took the text

Answer:

254.6N

Explanation:

F=ma

F=67×3.8

F=254.6N

The change in entropy when of potassium freezes can be calculated by using the equation ΔS = - ΔHfus / T.

To calculate the change in entropy (ΔS) when potassium freezes, we need two pieces of information: the heat of fusion (ΔHfus) of potassium and its freezing point temperature (T). Unfortunately, you did not provide the specific temperature in your question.

However, I can provide you with the formula to calculate the change in entropy:

ΔS = - ΔHfus / T

When you have the heat of fusion and freezing point temperature for potassium, plug those values into the formula and make sure to round your answer to the appropriate significant figures.

*Complete question: What can be used to calculate the change in entropy when potassium freezes?

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Answer:

Nuclear fission

Answer:

Aluminum isn't found pure naturally, but its found mixed with other minerals in the earth. It's used to make cans, foil, kitchen utensils, window frames and even deodorant

Explanation:

The small cube of gold has a volume of 0.000008 cubic inches (0.2 x 0.2 x 0.2). Using the density of gold (19.3 g/mL), we can convert the volume of the cube to mass. The mass of the cube is 0.0001544 grams (0.000008 x 19.3). Multiplying the mass of the cube by the value of gold ($43.91 per gram), we can find the value of the cube.

To find the mass of the small cube of gold, we first need to calculate its volume. The cube measures 0.2 inches on each side, so its volume is 0.2 x 0.2 x 0.2 = 0.000008 cubic inches. Next, we can use the density of gold (19.3 g/mL) to convert the volume of the cube to mass. Density is the measure of mass per unit of volume, so we can multiply the volume of the cube by the density of gold to get its mass. The mass of the cube is 0.000008 x 19.3 = 0.0001544 grams.

Finally, we can multiply the mass of the cube by the value of gold ($43.91 per gram) to determine its worth. The value of the cube is 0.0001544 x $43.91 = $0.00678. Therefore, if you inherited the small cube of gold, its value is $0.00678.

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The concentration of acetic acid in the vinegar sample is 3.30 M.

In this titration problem, we can use the balanced chemical equation for the reaction between acetic acid and sodium hydroxide:

CH3COOH (acetic acid) + NaOH (sodium hydroxide) → CH3COONa (sodium acetate) + H2O (water)

From the equation, we can see that the stoichiometric ratio of acetic acid to sodium hydroxide is 1:1. This means that the number of moles of sodium hydroxide used in the titration is equal to the number of moles of acetic acid in the vinegar sample.

We can start by calculating the number of moles of sodium hydroxide used:

n(NaOH) = M(NaOH) x V(NaOH)

n(NaOH) = 0.596 mol/L x 25.5 mL / 1000 mL/L

n(NaOH) = 0.0152 mol

Since the stoichiometric ratio of acetic acid to sodium hydroxide is 1:1, the number of moles of acetic acid in the vinegar sample is also 0.0152 mol.

Now we can calculate the concentration of acetic acid in the vinegar sample:

M(CH3COOH) = n(CH3COOH) / V(CH3COOH)

We have the number of moles of acetic acid, but we need to calculate the volume of the vinegar sample used in the titration. Since we know the initial volume of the vinegar sample (30.1 mL), we can use the volume of sodium hydroxide used (25.5 mL) to calculate the volume of acetic acid in the vinegar sample:

V(CH3COOH) = V(titrant) - V(NaOH)

V(CH3COOH) = 30.1 mL - 25.5 mL

V(CH3COOH) = 4.6 mL

Now we can calculate the concentration of acetic acid in the vinegar sample:

M(CH3COOH) = 0.0152 mol / 4.6 mL / 1000 mL/L

M(CH3COOH) = 3.30 mol/L

Therefore, the concentration of acetic acid in the vinegar sample is 3.30 M.

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We must first determine how many moles of Mg(OH)2 are in the solution in order to determine its molarity:

Compute Mg(OH)2's molar mass:

mol Mg = 24.31 g

O = 15.99 g/mol

H = 1.01 g/mol

Mg(OH)2 has a molar mass of 24.31 plus 2(15.99) plus 2(1.01), or 58.33 g/mol.

Determine how many moles of Mg(OH)2 there are:

Mass / molar mass = number of moles

1.925 moles are obtained by multiplying 112.3 g by 58.33 g/mol.

Determine the solution's molarity:

Molarity is equal to the moles of solute per litre of solution.

Molarity = 1.925 moles/1.2 litres = 1.60 M

As a result, the molarity of the solution created by combining 1.2 L of water with 112.3 g of Mg(OH)2 is 1.60 M.

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In an allegory, Hamlet describes the world as "an un-weeded garden," drawing attention to the source of their melancholy.

Simile to compare this same world to a garden where weeds had taken over as well as begun to multiply. In such a double metaphor, Polo.nius refers to Ophelia as a baby, implying that she was naïve to believe Hamlet's affections ("tenders") toward her are genuine whereas they are,, throughout fact, counterfeit silver coins.

Hamlet considers de.ath versus su.icide, comparing the mis ery and harsh ness of life even against possibility of a worse option.

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The equation 2NO₂ = N₂O represents a chemical equilibrium system. This means that there is a balance between the forward and reverse reactions that can occur between the reactants and products in the system.

In this system, 2 molecules of nitrogen dioxide (NO₂) can react to form 1 molecule of dinitrogen monoxide (N₂O), and this reaction can also go in the reverse direction where 1 molecule of N₂O can break down into 2 molecules of NO₂. At equilibrium, the rate of the forward reaction is equal to the rate of the reverse reaction, and the concentrations of the reactants and products no longer change over time. The specific position of the equilibrium depends on factors such as the temperature, pressure, and concentrations of the reactants and products.

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