16. if the principal quantum number, n of an atomic orbital is 3, what are the possible values of l?

1. I modeled a decomposition reaction.

2. used hydrogen peroxide (H2O2) as the compound for the reaction.

3. The reaction is exothermic. This is because the decomposition of hydrogen peroxide releases heat and energy, which can be observed through the effervescence or bubbling of the solution.

4. I recorded a video demonstrating the experiment and the resulting reaction.

5. A closed system is suitable for this reaction because it follows the law of conservation of mass, which states that mass cannot be created or destroyed, only transferred or transformed.

6. The potential energy diagram for this reaction would show the reactants at a higher energy level (400 KJ) and the products at a lower energy level (200 KJ), with the difference in energy being released as heat and energy.

7. The reaction is exothermic because it releases heat and energy, as observed through the effervescence or bubbling of the solution.

8. Factors that could affect the reaction rate include temperature, catalysts, and concentration of the reactants.

What is decomposition reaction?

A decomposition reaction is a type of chemical reaction in which a compound breaks down into two or more simpler substances. This type of reaction usually requires the addition of energy, such as heat or light, to break the bonds holding the compound together.

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The number of atoms in 31.0 grams of bromine can be determined using Avogadro's number and the molar mass of bromine. First, we need to find the number of moles of bromine in 31.0 grams. We can do this by dividing the given mass by the molar mass of bromine: 31.0 g / 79.90 g/mol = 0.388 mol

Now, we can use Avogadro's number, which is 6.022 x 10^23 atoms/mol, to find the number of atoms. We multiply the number of moles by Avogadro's number:  0.388 mol x 6.022 x 10^23 atoms/mol = 2.335 x 10^23 atoms Therefore, there are approximately 2.335 x 10^23 atoms in 31.0 grams of bromine. We first convert the mass of bromine to moles by dividing it by the molar mass. Then, we use Avogadro's number to convert the number of moles to the number of atoms.

To determine the number of atoms in 31.0 grams of bromine, we need to convert the mass to moles and then use Avogadro's number to find the number of atoms. First, we divide the given mass by the molar mass of bromine, which is 79.90 g/mol. This gives us the number of moles of bromine. Next, we multiply the number of moles by Avogadro's number, which is 6.022 x 10^23 atoms/mol. This converts the number of moles to the number of atoms. In this case, the calculation gives us approximately 2.335 x 10^23 atoms in 31.0 grams of bromine. It is important to use Avogadro's number to accurately determine the number of atoms, as it represents the number of particles in one mole of a substance.

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The balanced reaction equation is;

\(2LiI + Pb(NO_{3} )_{2} --- > 2LiNO_{3} + PbI_{2}\) as we can see from the equation that is written here.

In the balancing of the reaction equation, we have to make sure that the number of the reacting atoms on the reactant and the product side are the same for each of the elements.

On both sides of the equation, tally the atoms of each element. First, balance the polyatomic ion or the most complicated molecule. One element at a time, balance the other atoms of the reactants and products. Make sure that every atom is now evenly distributed on both sides of the equation.

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Answer:

C4H7OH + 6O2 => 4CO2 + 4H2O

Explanation:

hope This helps :)

An acid-base indicator must change color as a function of pH.

The main property of an acid-base indicator is its ability to undergo a color change in response to changes in pH. This allows it to indicate the acidity or basicity of a solution. The indicator molecule typically exists in different forms (protonated or deprotonated) depending on the pH of the solution, resulting in different absorption or reflection of light and hence a visible color change. The other properties mentioned, such as being hydrophobic, chemically inert, an acid or a base, or capable of chemical oxidation, are not essential requirements for an acid-base indicator.

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Answer:

line graphs

hope this helps :)

The number-weighted average molecular weight of this polymer sample is 2,000 g/mol.

To calculate the number-weighted average molecular weight of a polymer, you need to divide the total molecular weight of the sample by the number of polymer molecules.

Number-weighted average molecular weight (Mn) = Total molecular weight / Number of polymer molecules

In this case, the total molecular weight of the polymer sample is 2,000,000 g/mol, and there are 1,000 polymer molecules.

Mn = 2,000,000 g/mol / 1,000 molecules

Mn = 2,000 g/mol

Therefore, the number-weighted average molecular weight of this polymer sample is 2,000 g/mol.

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geothermal energy, form of energy conversion in which heat energy from within Earth is captured and harnessed for cooking, bathing, space heating, electrical power generation, and other uses.

Answer:

it can use for you wanted to do and we can use it for our wants...

Explanation:

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BTS

Answer:

Lithium sulfide

Answer:

9.18 L

Explanation:

When aluminum is placed in concentrated hydrochloric acid, hydrogen gas is produced. 2Al(s)+6HCl(aq)⟶2AlCl3(aq)+3H2(g) What volume of H2(g) is produced when 7.40 g Al(s) reacts at STP?

first write, then balance the equation

Al + HCl-------------> AlCl3 + H2

2Al + 6HCl-----------> 2AlCl3 + 3H2 2 MOLE  

2 moles of Al produce 3 moles of H2

Al is 7.4/27 =

0.27 moles of Al.

this will produce

0.27 X 3/2 moles of H2 =

0.41 moles of H2

PV =nRT

for STP, P = 1 atm, T = 273.2, R IS 0.082

V= (0.41) X 0.082 X 273,2/1 = 9.18 L

CHECK 1 mole of gas at STP has a volume of 22.4 L

0.41 moles then has a volume of 00.41 X 22.4L = 9.,18 L

The difference in the boiling points of ammonia (\(NH_3\)) and phosphine (\(PH_3\)) can be best explained by the presence of hydrogen bonding in ammonia, which results in a higher boiling point compared to phosphine.

Ammonia has a nitrogen atom, which is more electronegative than the phosphorus atom in phosphine. This causes a larger dipole moment in the ammonia molecule, leading to stronger intermolecular forces due to the formation of hydrogen bonds between the nitrogen and hydrogen atoms in adjacent molecules. These stronger forces require more energy to break, resulting in a higher boiling point for ammonia.

  In contrast, phosphine lacks hydrogen bonding due to the lower electronegativity of phosphorus compared to nitrogen. Therefore, the intermolecular forces in phosphine are weaker, requiring less energy to break, and leading to a lower boiling point under standard conditions.

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The equation for the energy-releasing reaction of PEP is PEP in the reaction gives pyruvate + Pi + 14.8 kcal/mole. This means that when PEP is converted into pyruvate and Pi, energy is released in the form of 14.8 kcal/mole.

The correct equation for the energy-releasing reaction of PEP is:
PEP → pyruvate + Pi + 14.8 kcal/mole

The equation for the energy-requiring reaction is that ADP + Pi + 7.3 kcal/mole on reaction gives ATP. This means that when ADP and Pi combine, energy is required and ATP is formed, requiring 7.3 kcal/mole of energy.

The correct equation for the energy-requiring reaction that forms ATP is:
ADP + Pi + 7.3 kcal/mole → ATP

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Answer: 0.62 M

Explanation:

molarity = (moles of solute)/(liters of solution)

Hence, the molarity is (0.547)/(.88) = 0.62 M (to 2 s.f.)

sorry I don't know 4one

i HOPE IT'S HELP

90 percent condensing furnaces are unique because they have a higher efficiency rate compared to traditional furnaces. They can extract more heat from the fuel source, resulting in a lower energy cost for the homeowner.

The unique feature of these furnaces is that they have a secondary heat exchanger that extracts additional heat from the combustion gases, which are then condensed and drained away. This process allows the furnace to utilize more of the energy produced, resulting in a higher efficiency rating. In addition to being more energy-efficient, 90 percent condensing furnaces are also better for the environment. They produce fewer greenhouse gas emissions, making them a more eco-friendly option. This is because the condensation process allows the furnace to capture and utilize more of the fuel's heat, reducing the amount of waste heat that is released into the atmosphere. Overall, 90 percent of condensing furnaces are unique in their ability to provide homeowners with an energy-efficient and environmentally-friendly heating option. By utilizing a secondary heat exchanger and condensing process, they are able to extract more heat from the fuel source, resulting in lower energy costs and reduced greenhouse gas emissions.

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The gas will occupy 1.25 liters at a pressure of 4 atm, assuming the temperature remains constant at 25.0 °C.

To solve this problem, we can use Boyle's law, which states that the pressure and volume of a gas are inversely proportional at constant temperature. Mathematically, this can be expressed as:

P₁V₁ = P₂V₂

where P₁ and V₁ are the initial pressure and volume of the gas, and P₂ and V₂ are the final pressure and volume of the gas, respectively.

Using this equation, we can solve for V₂:

P₁V₁ = P₂V₂

5.00 L × 1.00 atm = 4.00 atm × V₂

V₂ = (5.00 L × 1.00 atm) / 4.00 atm

V₂ = 1.25 L

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The calcium ion has 18 protons, 20 neutrons, and 20 electrons.
The relationship between the components a and b is Inverse proportion.


The calcium ion (Ca2+) has a 2+ charge, indicating that it has lost 2 electrons from its neutral state. To determine the number of protons, neutrons, and electrons in the calcium ion, we need to consider its atomic number and mass.

The atomic number of calcium is 20, which indicates that it has 20 protons. Since the calcium ion has a 2+ charge, it means it has lost 2 electrons. Therefore, the number of electrons in the calcium ion is 20 - 2 = 18.

The mass number of calcium is 40 amu, which represents the total number of protons and neutrons. Since the calcium ion has 20 protons, the number of neutrons can be calculated as 40 - 20 = 20.

So, the correct option is: d. 18 protons, 20 neutrons, and 20 electrons

In the expression a∼1/b, the relationship between the components a and b is an inverse proportion. This means that as the value of a increases, the value of b decreases, and vice versa. The symbol ∼ represents the proportional relationship between a and 1/b, indicating that they are inversely related. Therefore, the correct answer is: Inverse proportion

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Si reaccionan 50 g de silicio (P.A. = 28,08 g) con 80 % de pureza y suficiente oxígeno, se podría obtener A. 1,42 moles de SiO₂.

Consideremos la ecuación balanceada para la reacción entre silicio y oxigeno.

Si + O₂ ⇒ SiO₂

Tenemos 50 g de silicio con una pureza del 80%. La masa pura de silicio es:

\(50 g \times 80\% = 40 g\)

Podemos calcular los moles de SiO₂ obtenidos a partir de 40 g de Si usando los siguientes factores de conversion:

\(40gSi \times \frac{1molSi}{28,08gSi} \times \frac{1molSiO_2}{1molSi} = 1,42 mol SiO_2\)

Finalmente, convertiremos 1,42 moles de SiO₂ a gramos usando su masa molar (60,08 g/mol).

\(1,42 mol \times \frac{60,08g}{mol} = 85,3g\)

Si reaccionan 50 g de silicio (P.A. = 28,08 g) con 80 % de pureza y suficiente oxígeno, se podría obtener A. 1,42 moles de SiO₂.

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A. The emission spectrum of elemental hydrogen gas consists of discrete colored lines.

B. The absorption spectrum of elemental hydrogen gas shows dark lines superimposed on a continuous spectrum.

A. The emission spectrum of elemental hydrogen gas would consist of discrete and distinct lines of colored light, known as the hydrogen emission lines or the Balmer series. These lines correspond to specific energy transitions of electrons within the hydrogen atoms. The visible portion of the spectrum would include several bright lines, such as red, blue-green, and violet, indicating the emission of photons at those specific wavelengths.

B. The absorption spectrum of elemental hydrogen gas would show dark lines, known as absorption lines or the Balmer series, superimposed on a continuous spectrum. The dark lines correspond to the specific wavelengths of light that have been absorbed by hydrogen atoms as electrons transition from lower energy levels to higher ones.

The absorption spectrum would exhibit missing or attenuated regions of certain wavelengths, indicating the absorption of photons by the hydrogen gas at those particular energies.

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The process that correctly describes the growth in the number of ionized nitrogen molecules over time is D. The number of ionized molecules increases exponentially with each ionized molecule ionizing 3 other molecules every nanosecond.

Let's analyze the equation tN2 = 3⋅N, where N is the number of ionized molecules and t is the time in nanoseconds.

The equation states that the number of ionized molecules at time t is equal to 3 times the number of ionized molecules at the previous time step.

This implies that each ionized molecule ionizes 3 other molecules every nanosecond.

A physicist is studying the nature of static discharge by applying a voltage across a microscopic tube filled with nitrogen.

Static discharge is an event that takes place when there is a sudden flow of electric charge between two objects with different electrical potentials. This electric charge transfer results in a brief burst of electromagnetic energy (EMI or EMF), which can sometimes be observed as a visible spark in low-light conditions or heard as a crackling sound in high-quality audio systems.

The nature of static discharge is dependent on a variety of factors, including the composition of the material, the temperature and humidity, the electrical potential between the two objects, and the distance between the objects. Typically, static discharge occurs more frequently in environments with low humidity, such as during the winter months or in arid regions, as moisture acts as an insulator and prevents the buildup of electrical charge. In addition, materials that are good electrical conductors, such as metals, are more likely to experience static discharge than materials that are poor conductors, such as plastics or rubber.

Therefore, the correct description of the growth in the number of ionized nitrogen molecules over time is:

D. The number of ionized molecules increases exponentially with each ionized molecule ionizing 3 other molecules every nanosecond.

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Complete question is:

" physicist is studying the nature of static discharge by applying a voltage across amicroscopic tube filled with nitrogen molecules.Every nanosecond from then on, any ionized molecules willionize an additional number of molecules not already ionized, and ionization does not get lost.The equationtN2 3shows N, the number of ionized molecules, t nanoseconds after initiating a voltage.Which of thefollowing correctly describes the growth in the number of ionized nitrogen molecules over time?A.The number of ionized molecules increases linearly with each ionized molecule ionizing 2 other moleculesevery nanosecond.B.The number of ionized molecules increases linearly with each ionized molecule ionizing 3 other moleculesevery nanosecond.C.The number of ionized molecules increases exponentially with each ionized molecule ionizing 2 othermolecules every nanosecond.D.The number of ionized molecules increases exponentially with each ionized molecule ionizing 3 othermolecules every nanosecond."

Answer:

1.

CH4 + Cl2 → CH3-Cl + HCl

2CH3-Cl +2Na → C2H6

2.

CH3-CH2-OH ---(conc. H2SO4)----> CH2=CH2 + H2O

Explanation:

1. Conversion of methane to ethane

Step 1 - Treat methane with chlorine gas presence of ultraviolet light

CH4 + Cl2 → CH3-Cl + HCl

Step 2 - Treat chloromethane formed in step 1 with the sodium metal and dry ether  (Wrutz synthesis)

2CH3-Cl +2Na → C2H6

2. On treating ethanol with excess of concentrated sulfuric acid, it converts into ethene

CH3-CH2-OH ---(conc. H2SO4)----> CH2=CH2 + H2O

The balanced chemical equation for the neutralization reaction is: H2SO4 + 2NaOH -> Na2SO4 + 2H2OFrom the equation, we can see that 2 moles of NaOH are required to neutralize 1 mole of H2SO4. Therefore, the number of moles of NaOH used in the reaction is: n(NaOH) = M(NaOH) x V(NaOH) = 0.150 mol/L x 0.0250 L = 0.00375 mol

Since 2 moles of NaOH react with 1 mole of H2SO4, the number of moles of H2SO4 in the sample is: n(H2SO4) = 0.00375 mol / 2 = 0.00188 molThe volume of the sulfuric acid solution is given as 75.0 mL or 0.0750 L. Therefore, the molarity of the sulfuric acid solution is: M(H2SO4) = n(H2SO4) / V(H2SO4) = 0.00188 mol / 0.0750 L = 0.0251 mol/L
To calculate the molarity of the sulfuric acid (H2SO4) solution, we need to use the given information: a 75.0 mL sample of H2SO4 is neutralized by 25.0 mL of 0.150 M NaOH.

Here's a step-by-step explanation: Write down the balanced chemical equation for the reaction H2SO4 + 2NaOH → Na2SO4 + 2H2O Step 2: Calculate the moles of NaOH used in the reaction Moles of NaOH = Molarity of NaOH × Volume of NaOH (in liters) Moles of NaOH = 0.150 M × 0.025 L (since 25.0 mL = 0.025 L) Moles of NaOH = 0.00375 moles Step 3: Determine the stoichiometric ratio between H2SO4 and NaOH from the balanced equation. 1 mol H2SO4 reacts with 2 moles NaOH, so the ratio is 1:2. So, the molarity of the sulfuric acid  is 0.025 M.

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Answer:

87.2 liquid quarts (US)

As a result, atoms in group 17 can form a single covalent bond. Because atoms in group 16 require two electrons to form an octet, they can form two covalent bonds.

Electrons are subatomic particles that, along with protons and neutrons, make up the most fundamental component of atoms. For a long time, the atom was thought to be the final structure of an element. The term 'atom' is entirely representative of that thought because it comes from the Greek word for indivisible. All of that changed in 1897, when the English physicist J.J. Thomson discovered electrons as part of subatomic particles, i.e., particles that make up the atom, using his now-famous cathode ray tube experiments.

According to Dalton's atomic theory, atoms are the smallest particles of an element that have the same properties as the element and can never be created or destroyed.

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(a) Within a reversible reaction, forward and reverse chemical reactions progress at the same pace while concentrations of products and reactants remain constant with time.

(b) Le Chatelier's principle states that an increase in pressure advantages a side containing fewer moles of gas. For instance, in the formation of methanol from CO and H2, one molecule of gas is formed while two molecules come from the elements themselves.

(c) Sustaining a pressure above 5 MPa would be costly as high-tensile materials, equipment and additional energy are needed to compress the gases at those pressures.

(d) Rising temperature allows for an equilibrium towards the endothermic direction, where heat consumption occurs. Here, since the exothermic reaction itself releases heat; it will result in a shift towards the reactant side, causing a fall in the yield rate of methanol produced.

(e) If a catalyst does not exist, reaction rates would slow down considerably, requiring higher temperatures to prompt reasonable reaction progression. This is because catalysts lower activation energy, enabling the reaction to be done at lesser temperatures.

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Answer: because they take a lot of tie to form  

Answer:

5 hours

Explanation:

Given:

Distance = 275 km

Speed = 55 km/h

\(speed = \frac{distance}{time} \)

\(time = \frac{distance}{speed} \)

\(time = \frac{275}{55} \)

\(time = 5\)

The buffer solution is made by mixing NH3(aq) and NH4Cl(s) where NH3 acts as a base and NH4+ acts as an acid.

The solution has a greater buffer capacity for the addition of acid than for base, because [NH3]>[NH4+].When the NH4Cl(s) was added to the NH3(aq) for the experiment, only about 50g of NH4Cl(s) was added, although 53.49g of NH4Cl(s) was measured. This means that the buffer capacity of the solution will be affected.

The pH of the buffer solution is determined by the concentration of NH3 and NH4+. If there is more NH3 than NH4+, the pH will be basic, and if there is more NH4+ than NH3, the pH will be acidic.

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Answer:

Explanation: