Bohr shows that electrons stay in discrete energy levels around the nucleus.
A. True
B. False​

As an atom loses one or more electrons, it transforms into positively charged atoms known as cations. An atom of neutral sodium, for instance, has 11 electrons (Z = 11).

In Group 15, elements with five valence electrons are classified. Group 15 includes the elements nitrogen, phosphorus, arsenic, and antimony.

To determine how many atoms of one element will mix with another to make any chemical formula, the valency or valency chart is useful. Finding or determining the formulas of compounds is another significant application of an element's valency.

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Kai asked 10 random students how long it took for them to get to school using different methods on two different days. Without knowing the specific methods the students used, it is difficult to provide an accurate estimate for how long it will take students to get to school on their next trip. However, I can provide a rough estimate based on the data Kai collected.

Assuming Kai collected data for common methods such as walking, biking, driving, or taking the bus, we can analyze the average time it took for each method on the two different days. Let's say on Day 1, the average time for walking was 15 minutes, biking was 10 minutes, driving was 20 minutes, and taking the bus was 30 minutes. On Day 2, the average time for walking was 20 minutes, biking was 15 minutes, driving was 25 minutes, and taking the bus was 35 minutes.

Based on this data, we can estimate that on the next trip, it will take students around 150 minutes (10 students x 15 minutes) to walk to school, 100 minutes (10 students x 10 minutes) to bike to school, 200 minutes (10 students x 20 minutes) to drive to school, and 300 minutes (10 students x 30 minutes) to take the bus to school. Of course, this is a very rough estimate and may not accurately reflect the time it will take each individual student on their next trip, as there are many variables that can affect travel time such as traffic, weather, and distance.

Based on Kai's research, he can estimate the time it takes for students to get to school using different methods. Since we don't have specific data from his study, here's a general guideline:

1. Walking: If most students take about 15-30 minutes to walk to school, the estimated time for their next trip would be around 15-30 minutes.
2. Biking: If biking takes students about 10-20 minutes, their next trip could be estimated within that range.
3. Public transportation: Assuming students take 20-40 minutes on public transport, the estimated time for their next trip would be within this range.
4. Driving: If driving takes students approximately 5-15 minutes, their next trip could be estimated within that time frame.

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.

Answer:

NO

Explanation:

NO NO NO

i am way to much of an idiot for this (hope i made you laugh (and mad cuz i did not answer) :3)

Answer:

The answer is C and E

Explanation:

I just had that question

Answer:

c and e

Explanation:

Chlorobenzene can be converted into benzoic acid using Grignard reagent. Thus, treating with Mg metal in dry ether followed by carboxylation and then hydrolyising the product gives benzoic acid.

Grignard reagents are alkyl magnesium halides with the general formula RMgX. They can be prepared by treating alkyl halides with Mg metal in presence of dry ether.

Chlorobenzene when treated with Mg gives MgCl substituted benzene ring which upon carboxylation using carbon dioxide followed by hydrolysis gives benzoic acid.

Therefore, the reagents needed for the conversion of chlorobenzene to benzoic acid are Mg, CO₂ and water.

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In de Morceau's nomenclature scheme, the smaller atom appears first.

Nomenclature is an organism name system used in biological classification. Genus and species names, two Latinized nouns drawn from numerous sources, serve as indicators of the species to which the creature belongs.

On August 26, 1743, Antoine-Laurent Lavoisier was born in Paris, France. He was a well-known French chemist and a key player in the 18th century chemical revolution. In addition to co-creating the current system for identifying chemical compounds, he established an experiment-based explanation of the chemical reactivity of oxygen.

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A buffered solution will resist changes in pH when small amounts of acid or base are added.

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Answer:

1 mole of Helium is answer

Answer:

Hydrogen, Helium, Lithium, Beryllium, Boron, Carbon, Nitrogen, Oxygen, Fluorine, Neon, Sodium, Magnesium, Aluminum, Silicon, Phosphorus, Sulphur, Chlorine, Argon, Potassium, Calcium

Let me know if this helps

To assign a priority to an atom that is part of multiple bonds, treat the multiple bonds as an equivalent number of single bonds. Hence, option A is correct.

A carbon atom is a chiral (stereogenic) centre if it is tetrahedral (sp3) and has four different groups (ligands) attached to it.

To assign a priority to an atom that is part of multiple bonds, treat the multiply bonded atom as an equivalent number of singly bonded atoms.

If two isotopes are bonded to the stereogenic centre, the isotope with the higher mass number has a higher priority.

Hence, option A is correct.

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Answer:

a. To produce 5.0 mol of water, we need to know the number of moles of hydrogen involved in the reaction. The chemical equation 2H2(g) + O2(g) -> 2H2O(g) tells us that 2 moles of hydrogen react with 1 mole of oxygen to produce 2 moles of water. So, to produce 5.0 mol of water, we need 2.5 moles of hydrogen.

b. If we know the number of moles of hydrogen, we can calculate the number of moles of oxygen required for the reaction. The chemical equation tells us that 2 moles of hydrogen react with 1 mole of oxygen, so if we have 2.5 moles of hydrogen, we would need 1.25 moles of oxygen.

The grams of sucrose is 0 g calculated by determining the molality of the solution.

To calculate the grams of sucrose, we first need to find the moles of sucrose. The molality of the solution can be found using the formula:

molality = (Kf value) x (temperature change).

In this case, the temperature change is 0 °C, so the molality is 0.

To find the moles of sucrose, we use the formula:

moles of solute = (molality) x (kg of solvent).

Since water is the solvent and its mass is not given, we can assume it to be 1 kg for simplicity.

Therefore, moles of sucrose = 0 x 1 = 0.

Finally, we can convert moles to grams using the molar mass of sucrose, which is 342.3 g/mol.

Thus, the grams of sucrose is 0 g.

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To properly test for total chlorine in water, it is important to collect the correct amount of water. The recommended amount of water to collect for total chlorine testing is at least 100 mL.

This amount of water ensures that the test results are accurate and representative of the overall chlorine content in the water sample.

It is also important to ensure that the water sample is collected in a clean and sterile container to avoid any contamination that may affect the test results.

It is recommended to collect the water sample from the middle of the water source, and to avoid collecting water that may have been stagnant for an extended period of time.

Proper collection and testing of water for total chlorine is crucial in ensuring the safety and quality of drinking water.

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The concentration of the final solution is 2.07 M

Concentration is the abundance of a constituent divided by way of the overall volume of an aggregate. several sorts of mathematical descriptions may be outstanding: mass concentration, molar concentration, variety concentration, and extent awareness.

Given;

C₁ = 1.5 M NaCl

V₁ = 345 mL

C₂ =

V₂ =  250 mL

C₁V₁ = C₂V₂

C₂ = C₁V₁ /V₂

     = 1.5 × 345 / 250

     = 2.07 M

The concentration of a substance is the quantity of solute found in a given amount of solution. Concentrations are normally expressed in terms of molarity, defined because of the variety of moles of solute in 1 L of answer.

The Concentration of an answer is a measure of the quantity of solute that has been dissolved in a given amount of solvent or answer. A concentrated answer is one that has a rather huge quantity of dissolved solute

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The amino acid with the chemical formula C2H5NO2 is transported through the water-based bloodstream to all body cells that need it by utilizing specific transport systems such as amino acid transporters, facilitated diffusion, and active transport.

Amino acids are vital building blocks for proteins and are necessary for various biological processes in the body. To ensure that amino acids reach the cells that require them, specific transport mechanisms are involved. The amino acid C2H5NO2, like other amino acids, is transported through the bloodstream using amino acid transporters.

Amino acid transporters are proteins embedded in the cell membranes of blood vessels and cells. These transporters facilitate the movement of amino acids across the membrane, allowing them to enter the bloodstream and be distributed throughout the body.

The transport process involves facilitated diffusion, where the amino acids move from an area of high concentration (bloodstream) to an area of low concentration (cells) using concentration gradients.

In addition to facilitated diffusion, some amino acids may require active transport. Active transport involves the use of energy (ATP) to move amino acids against their concentration gradient, allowing them to reach cells even in low concentration areas.

This ensures that the amino acid C2H5NO2 reaches all body cells that need it, supporting various biological functions and protein synthesis.

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Answer:

radiation

Explanation:

Answer:

neither

Explanation:

Kinetic Energy is the physical movement of objects.

The theoretical yield of calcium sulfate monohydrate would be 0.667g.

Calcium sulfate dihydrate (CaSO4 · 2H2O) decomposes to form calcium sulfate monohydrate (CaSO4 · H2O) and water (H2O). The molar mass of calcium sulfate dihydrate is 172.17 g/mol, while the molar mass of calcium sulfate monohydrate is 156.16 g/mol. To determine the theoretical yield of calcium sulfate monohydrate, we need to calculate the amount of calcium sulfate monohydrate that would be obtained from 1.5g of calcium sulfate dihydrate.

Convert the mass of calcium sulfate dihydrate to moles.

1.5g / 172.17 g/mol = 0.00871 mol (calcium sulfate dihydrate)

Use the stoichiometric ratio between calcium sulfate dihydrate and calcium sulfate monohydrate to determine the moles of calcium sulfate monohydrate produced.

According to the balanced equation, 1 mole of calcium sulfate dihydrate yields 1 mole of calcium sulfate monohydrate.

0.00871 mol (calcium sulfate dihydrate) × 1 mol (calcium sulfate monohydrate) / 1 mol (calcium sulfate dihydrate) = 0.00871 mol (calcium sulfate monohydrate)

Convert the moles of calcium sulfate monohydrate to mass.

0.00871 mol (calcium sulfate monohydrate) × 156.16 g/mol = 1.36 g (calcium sulfate monohydrate)

Therefore, the theoretical yield of calcium sulfate monohydrate from 1.5g of calcium sulfate dihydrate would be 1.36 g.

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The theoretical yield of calcium sulfate monohydrate when 1.5g of calcium sulfate dihydrate is decomposed would be approximately 1.27 grams. This is calculated based on the molecular weights of both compounds and the stoichiometry of the reaction.

The question asks about the theoretical yield of calcium sulfate monohydrate when 1.5g of calcium sulfate dihydrate is decomposed. This is a chemistry-based calculation that involves understanding molecular weight and stoichiometry. The molecular weight of calcium sulfate dihydrate (CaSO4.2H2O) is 172.17 g/mol and that of calcium sulfate monohydrate (CaSO4.H2O) is 146.15 g/mol.

By using the equation of stoichiometry, it follows that 1 mol of calcium sulfate dihydrate decomposes to form 1 mol of calcium sulfate monohydrate. So, the mass (in grams) of CaSO4.H2O must be equivalent to the mass (in grams) of CaSO4.2H2O, correcting for molecular weight.

To calculate, (1.5 g CaSO4.2H2O)*(1 mol CaSO4.2H2O/172.17 g CaSO4.2H2O)*(146.15 g CaSO4.H2O/1 mol CaSO4.H2O) = 1.27 g of calcium sulfate monohydrate.

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The slopes and the y-intercepts are

The formula for calculating the slope of a line from the two coordinates that the line passes through A (x₁ , y₁) and B (x₂ , y₂)

m = (y₂ - y₁) ÷ (x₂ - x₁)

The y-intercept will occur if the value of x = 0.

1. Pick the first and the last coordinates (- 5 , - 4) and (10 , 2)

2. (2 , 0) and (8 , 9)

3. (1 , - 5) and (5 , - 1)

4. (- 1 , 5) and (5 , - 1)

5. (1 , 3) and (4 , 12)

6. (- 6 , 6) and (0 , 3)

7. (0 , - 5) and (6 , 10)

8. (- 3 , - 1) and (6 , 5)

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La energía cinética está relacionada con la velocidad de las partículas.

Sabemos que la velocidad de las moléculas de gas depende de la temperatura del cuerpo. La temperatura de un cuerpo es una medida de la energía cinética promedio de las moléculas del cuerpo.

Debemos notar que cuanto mayor es la temperatura del cuerpo, mayor es la velocidad de sus moléculas. Por lo tanto, a una temperatura de 10,000,000 ° C, las moléculas en el núcleo del sol tienen una velocidad mayor que las moléculas en la superficie del sol.

Todas las moléculas, ya sea en el núcleo o en la superficie del sol, se mueven a mayor velocidad que las moléculas de la limonada a una temperatura mucho más baja. La energía cinética está relacionada con la velocidad de las partículas.

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The Ksp expression for A2B3(s) can be written as [A]²[B]³, where [A] and [B] represent the molar concentrations of A and B ions in the solution, respectively.

This expression indicates the equilibrium constant for the dissolution of the solid A2B3 into its constituent ions, and it is important for predicting the solubility of the compound in different solvents.

Therefore we can say thatThis expression indicates the equilibrium constant for the dissolution of the solid A2B3 into its constituent ions, and it is important for predicting the solubility of the compound in different solvents.

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Answer:large

Explanation: I got it right on the quiz

Answer: Large

Explanation: If you plucked a guitar string lightly, the string would vibrate and give off sound waves with small amplitudes. The resulting sound would be soft, with a low decibel level. If you then plucked the guitar string as hard as you could, the string would vibrate strongly and give off sound waves with large amplitudes. The resulting sound would be loud, with a higher decibel level.  

The rate at which water molecules gain kinetic energy and escape the liquid phase into a gaseous phase increases as the temperature increases.

In detail, when water is heated, the molecules absorb the energy and start to vibrate more and more vigorously. If the water is heated to its boiling point, 100°C, the molecules have gained enough kinetic energy to escape the liquid phase and transition into a gaseous phase (steam).

This process of a substance changing from a liquid to a gas is called boiling or evaporation. As the temperature of water continues to increase, the rate at which molecules escape the liquid phase also increases, leading to an increase in the rate of boiling or evaporation.

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The Correct answer is Option B) Sulfur. This is the element in pyrite that contributes to acid mine drainage.

One ingredient that should never be ignored is sulphur(S). Group 16 of the periodic table is where Sulphur is located. It is obtained as a byproduct following the manufacturing of natural gas and is non-metal. It is a bright yellow colour and has a terrible smell (like rotten eggs). Sulfur has been consumed by people for a thousand years despite its apparent physical characteristics. Why? Considering that you might just come across it on the ground.

Sulfur is a straightforward element to locate both on the ground and in the periodic table. It occupies the sixteenth position, immediately below oxygen (O). Sulfur is typically found as crystal and has a yellowish color when it occurs naturally.

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Answer:

24.36 grams.

Explanation:

The emission of a photon with the largest energy can be identified using the energy formula for an electron's transition between different energy levels in an atom.

The larger the energy difference between the initial and final energy levels, the larger the energy of the emitted photon. The energy difference between the initial and final energy levels is directly proportional to the frequency and inversely proportional to the wavelength of the emitted photon. Therefore, the larger the frequency or the smaller the wavelength, the larger the energy of the emitted photon.(a) n = 2 to n = 1: ΔE = 2.18 x 10^-18 J - 5.45 x 10^-19 J = 1.64 x 10^-18 J. The frequency of the emitted photon is given by:f = ΔE/h = (1.64 x 10^-18 J)/(6.626 x 10^-34 J s) = 2.47 x 10^15 Hz. The wavelength of the emitted photon is given by:λ = c/f = (2.998 x 10^8 m/s)/(2.47 x 10^15 Hz) = 1.21 x 10^-7 m.(b) n = 3 to n = 1: ΔE = 2.18 x 10^-18 J - 1.36 x 10^-18 J = 8.23 x 10^-19 J. The frequency of the emitted photon is given by:f = ΔE/h = (8.23 x 10^-19 J)/(6.626 x 10^-34 J s) = 1.24 x 10^15 Hz. The wavelength of the emitted photon is given by:λ = c/f = (2.998 x 10^8 m/s)/(1.24 x 10^15 Hz) = 2.42 x 10^-7 m.(c) n = 6 to n = 4: ΔE = 2.18 x 10^-18 J - 4.86 x 10^-19 J = 1.69 x 10^-18 J. The frequency of the emitted photon is given by:f = ΔE/h = (1.69 x 10^-18 J)/(6.626 x 10^-34 J s) = 2.55 x 10^15 Hz.

The wavelength of the emitted photon is given by:λ = c/f = (2.998 x 10^8 m/s)/(2.55 x 10^15 Hz) = 1.18 x 10^-7 m.(d) n = 1 to n = 4: ΔE = 4.36 x 10^-19 J - 2.18 x 10^-18 J = -1.74 x 10^-18 J. This is an absorption process, not emission.(e) n = 2 to n = 4: ΔE = 4.86 x 10^-19 J - 1.64 x 10^-18 J = -1.16 x 10^-18 J. This is an absorption process, not emission.Therefore, the correct answer is (b) n = 3 to n = 1 because it has the smallest wavelength and the highest frequency, and therefore, the largest energy of the emitted photon. The energy formula for this transition is ΔE = 8.23 x 10^-19 J, and the wavelength of the emitted photon is 2.42 x 10^-7 m.

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Answer:

What atoms are present in carbon tetrachloride?

There is 1 carbon, and 4 chlorine atoms (or chloride ions if you want to get technical). Tetra means 4 in Greek.

hope that helps❤

Answer:

there are no calcium atoms of n carbon tetrachloride

Carbon is a non metal and also has four valence electrons.