What does the principle quantum number tell you?
What is the symbol we use for it?
What are shells?
Compare the energy in the 4th shell to that of the 3rd shell.

Answer:

here's a great idea!

take a jug of water by finding the volume of that water and ask the 2 year old to chug it all in... the volume of water drank by the 2 year old is the volume of the two year old

The substance in the image above would be classified as a mixture of elements (option E).

A compound is a substance formed by chemical bonding of two or more elements in definite proportions by weight.

On the other hand, a mixture is made when two or more substances are combined, but they are not combined chemically.

According to this question, an image is shown with two different substances or elements as distinguished by coloration (white and purple). These elements are combined but not chemically bonded, hence, is a mixture.

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Answer:

305.88 g

Explanation:

4 Al + 3 O₂ → 2 Al₂O₃

First, we convert 6 moles of aluminum (Al) into moles of aluminum oxide (Al₂O₃), using the stoichiometric coefficients:

6 mol Al * \(\frac{2molAl_2O_3}{4molAl}\) = 3 mol Al₂O₃

Finally we convert 3 moles of aluminum oxide into grams, using its molar mass:

3 mol Al₂O₃ * 101.96 g/mol = 305.88 g

The pH value of the solution which have a count of hydrogen ion [H⁺] of 0.57 is 0.244.

The pH ("potential of hydrogen" or "power of hydrogen") of a solution is essentially a measure of the concentration of hydrogen ions in a solution. In other terms, pH is a scale used to define the acidity or basicity of an aqueous solution. Acidic solutions with larger quantities of H+ ions have lower pH values than basic or alkaline solutions.

In the provided solution, the strong bases are totally ionised. As a result, the concentration of the hydroxide ion is the same as the concentration of the base. The hydroxide ion concentration in the mixture is equal to the sum of the base concentration divided by the entire volume.

we have value of [H⁺] is  0.57

so pH of the solution is

pH = -log [H⁺]

= - log(0.57)

= - (-0.244)

= 0.244

pH of the solution is 0.244.

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Answer:

sucrose?

Explanation:

Answer:

sugar is an ionic compound

Explanation:

Answer:

80.5 atm

Explanation:

First of all, we convert 28.0 °C and 50.0 °C into K:

To answer this problem we'll use Gay-Lussac's Law, which states that:

In this case:

We put the data:

And solve for P₂:

Thus, the correct answer is 80.5 atm.

Answer:

b

Explanation:

he drove 5x faster than the time was when he was on the last hour (maybe caught in traffic or wasn't in a rush)

The statement "the reaction between R and P appeared to stop when no further changes were observed" suggests that the observable changes in the reaction have ceased. However, chemical reactions may not actually "stop" completely even when no further changes are visibly observed.

Chemical reactions occur at the molecular level, where individual molecules collide and undergo chemical transformations. Even if the macroscopic changes or observable properties appear to have reached a steady state, the molecular-level reactions can continue at an equilibrium. In other words, while the overall concentrations or properties of the reactants and products may remain constant, the individual molecules are still undergoing constant microscopic fluctuations and interconversions.

In such cases, the reaction is considered to be in a dynamic equilibrium, where the forward and reverse reactions occur at equal rates, resulting in no net change in the macroscopic observable properties. This state of equilibrium does not imply that the reaction has completely stopped but rather that the rates of the forward and reverse reactions have balanced out.

Therefore, even when no further changes are observed at the macroscopic level, chemical reactions can continue at the molecular level in a dynamic equilibrium state.

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Here are the fertilizers arranged in decreasing order of mass percentage of nitrogen:

Note that H₂ is not a fertilizer and was not included in the list.

Promoting plant growth: Nitrogen is an essential nutrient for plant growth, and fertilizers with nitrogen can help plants grow faster and stronger.

Enhancing leaf and stem growth: Nitrogen is a key component of chlorophyll, which is necessary for photosynthesis. Fertilizers with nitrogen can help plants produce more chlorophyll, which in turn can lead to greater leaf and stem growth.

Overall, fertilizers with nitrogen can be an important tool for promoting healthy plant growth and maximizing crop yields.

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At the end of the reaction before adding aqueous \(NaHCO_3\), the following chemical species are likely to be present:

A Lewis structure, also known as a Lewis dot diagram, is a way to represent the chemical bonding in a molecule. It uses dots (also called electron dots or Lewis dots) to show the valence electrons on an atom, and lines to show the bonds between atoms. The goal of drawing a Lewis structure is to use the valence electrons of the atoms in a molecule to form the most stable arrangement of atoms, that is to say, to achieve the octet rule where each atom has 8 valence electrons in its outermost shell.

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To make 1 liter of a 10% NaCl solution from a solid stock, you will require the following materials and containers.MaterialsSolid NaClDistilled water1-Liter volumetric flask250-mL volumetric flask 2-beakersProcedureTo prepare 1 liter of a 10% NaCl solution, the following procedure should be followed:Measure out 100g of NaCl using a balance.

Measure the weight of an empty 250-mL volumetric flask.Add the NaCl to a 250-mL beaker and add a small amount of distilled water to it to dissolve the NaCl.Carefully pour the dissolved NaCl solution into the 250-mL volumetric flask. Add distilled water to the mark on the flask to make up the volume. Stopper the flask and invert it several times to mix the solution.Measure the weight of the 1-Liter volumetric flask.Add the 250-mL volumetric flask solution to a 1-Liter volumetric flask.Add distilled water to the mark on the flask to make up the volume.

Stopper the flask and invert it several times to mix the solution.The final volume of the solution will be 1 liter of a 10% NaCl solution.PrecautionsEnsure the NaCl has completely dissolved before adding more water to avoid making a less concentrated solution.Measure the weight of the volumetric flask before and after adding the solution to calculate the volume of solution that was added.Use distilled water to prepare the solution.

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Answer:

B: Mercury

Explanation:

Yuh

The proper responses of reactions are:

C₆H₅OH + HCl + Cl- = C₆H₅OH₂+ + Cl- (a) (aq)

C₆H₅OH (l) + H₂O (l) = C₆H₆O- (aq) + H₃O+ (c) (aq)

(d) FeCl₃(aq) + 6 C₆H₅OH(aq) = H₃[Fe(C₆H₅O)₆]. (aq) + 3HCl (aq)

By giving a single pair of electrons from the oxygen atom to the hydrogen ion (H+), which functions as a Lewis acid in reaction (a), phenol operates as a Lewis base.

In reaction (c), phenol functions as a Lewis base by giving a proton (H+) from water, which functions as a Lewis acid, a single pair of electrons from the oxygen atom.

By giving a single pair of electrons from the oxygen atom to the metal ion (Fe∧3+), which performs as a Lewis acid in reaction (d), phenol functions as a Lewis base.

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The pH after 25.0 mL of NaOH has been added would be approximately 8.20.

pH (potential of Hydrogen) is a measure of the acidity or alkalinity of a solution. It is measured on a logarithmic scale from 0 to 14, with 7 being neutral. A pH below 7 is considered acidic, while a pH above 7 is considered basic or alkaline. The lower the pH, the more acidic the solution is. The higher the pH, the more basic or alkaline the solution is. A pH of 0 is the most acidic and a pH of 14 is the most basic or alkaline. pH is important in many different fields, such as biology, chemistry, and medicine. It is used to measure the acidity of water, soil, and other substances, and is also used to monitor water quality.

This is equal to 0.0025 moles of HCl, which is equal to 0.00025 moles of HC2H3O2. The pH of the solution can then be calculated using the Henderson-Hasselbalch equation:  pH = pKa + log (base/acid)

pH = 4.76 + log(0.0025/0.00025)

pH = 8.20

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The Earth's surface is not covered with the same materials ; however, some areas share similar materials.Several drilling sites have been dug in various regions of the planet to analyze the Earth's surface.

Each drilling site is unique, with differing characteristics and results. Despite these differences, all of the drilling sites analyzed offer scientists a more in-depth knowledge of the Earth's surface.In essence, the scientific drilling sites each had different lithologies, stratigraphies, and geologies. Each site had different types of rocks, depths, and ages, which led to varying drilling conditions, depths, and equipment used. Different types of equipment were also used to reach the depths required, which was a significant difference in each drilling site.The scientific drilling sites also had different purposes. Scientists had specific goals they wanted to achieve at each location. For example, the scientific drilling site in the Iceland region was focused on analyzing a unique layer of igneous rocks. The primary objective was to investigate the formation of the rock layer.The same materials were not found at each scientific drilling site.

Still, they had some similarities. They all provided geologists with vital information about the Earth's surface. The data provided from each drilling site was used to piece together the Earth's geologic history and how it has changed over time.

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This weather map shows that there is a low pressure system in the north and a high pressure system in the south.

Weather is the study of atmospheric conditions that exist in a specific area over a short period of time. It is the sum of all atmospheric conditions including temperature, humidity, wind, air pressure, cloud cover and precipitation. Weather is an important factor in determining the temperature, humidity and other characteristics of the environment. It affects human activities such as agriculture, transportation and recreation. Weather is dynamic and constantly changing. It is affected by a variety of factors such as solar radiation, air pressure, ocean currents, land topography and human activities. Weather is also affected by climate, which is the average weather pattern over a long period of time. Understanding weather is important for many reasons, including to predict storms and floods, to plan for extreme weather events, and to prepare for natural disasters.

This weather map shows that there is a low pressure system in the north and a high pressure system in the south. The low pressure system is bringing cooler temperatures and precipitation, while the high pressure system is bringing warmer temperatures and clear skies. There is a cold front moving eastward from the north, and a warm front moving eastward from the south.

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Answer:

0.2mol/kg

Explanation:

molality is the concentration of a solution in moles of solute per kilogram of solvent

moles of solute (NaOH) = 2moles

mass of solvent in kg. =10kg

Therefore molality. = 2moles/10 kg

=0.2mol/kg

i need help ls i thank its book 500 grams

The missing components of the neutralisation reaction include the following:

Neutralisation reaction is defined as the type of reaction that leads to the formation of salt and water when an acid and a base reacts.

From the reactions given the missing components are replaced as follows:

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Answer:

A: 33S

Explanation:

An atom has 16 protons & 17 neutrons. What is the chemical symbol for the atom? Consult the periodic table.

Answer:

the answer is A

Explanation:

i just took quiz and got 100%

Answer:

D.The space between the water particles becomes much larger.

Explanation:

Answer:

the space between the water particles become much larger

Answer:

One of the purposes of the Marshall Plan was to aid nations in economic recovery from WWII.

Explanation:

The Marshall Plan aided the defeated Axis powers because that's one of the reasons it was created, The Marshall Plan was supposed to rehabilitate the economies of the 17 western and southern European countries in order to create stable conditions for democracy to continue.

The number of moles of diphosphorus trusulfide can be produced if 10 moles of phosphorus and 13.0 moles of sulfur react to make P₂S₃ is 40 moles.

To calculate the number of moles of diphosphorus trusulfide can be produced, we must know the balanced chemical equation for the reaction of 10 moles of phosphorus and 13.0 moles of sulfur to form P₂S₃ is:

P4₄+ 3S₈ → 4P₂S₃

One mole of P₄ reacts with 3 moles of S₈ to form 4 moles of P₂S₃.

The molar ratio of P₄:S₈:P₂S₃ is 1:3:4. Using this ratio, we can calculate the number of moles of P₂S₃ produced by reacting 10 moles of phosphorus and 13.0 moles of sulfur.

P₄:S₈:P₂S₃

= 10:13:??

= (10÷1):(13÷3):(4÷1)

= 10:4.33:4

Since the ratio of P₄:S₈:P₂S₃ is 10:13:4, and 10 moles of phosphorus react, the limiting reactant is phosphorus. Therefore, the maximum amount of P₂S₃ that can be produced is given by the moles of P₄ that reacted. 4 moles of P₂S₃ are produced from 1 mole of P410 moles of P₄ are reacted.

Therefore, the maximum amount of P₂S₃ that can be produced is:

4 moles P₂S₃/ 1 mole P₄ × 10 moles P₄

= 40 moles P₂S₃

Hence, 40 moles of diphosphorus trisulfide can be produced.

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The largest amount of PCl5 that could be produced can be determined by the limiting reactant in the reaction between solid phosphorus (P) and chlorine gas (Cl2).The balanced equation for the reaction is: P4 + 10Cl2 → 4PCl5

From the given quantities, we have 9.0 mol of P and 2.0 mol of Cl2.To determine the limiting reactant, we compare the moles of each reactant with their respective coefficients in the balanced equation: Moles of PCl5 from P: 9.0 mol P × (4 mol PCl5 / 1 mol P) = 36.0 mol PCl5. Moles of PCl5 from Cl2: 2.0 mol Cl2 × (4 mol PCl5 / 10 mol Cl2) = 0.8 mol PCl5. Since the moles of PCl5 from Cl2 are lower, chlorine (Cl2) is the limiting reactant. Therefore, the largest amount of PCl5 that can be produced is 0.8 mol (rounded to the nearest 0.1 mol).

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