which of the following observations is evidence that the rutherford model of an atom was incomplete? which of the following observations is evidence that the rutherford model of an atom was incomplete? atoms were observed to display discrete and unique spectra. no neutrons were observed within the nucleus of the atom. the nucleus of an atom was observed to be negatively charged. atoms were observed to display emission of continuous spectra.

Two possible sources of systematic (determinate) error in the experiment are; Incorrect calibration of volumetric glasswareIncorrect mass of NaCl

To calculate the concentration of NaCl in the resulting solution in mg/L NaCl, we can use the formula; Concentration (mg/L) = (Mass of solute ÷ Volume of solution in L) × 1000 g / 1 mg NaCl is present in the stock solution of 25 mL. So, the mass of NaCl in the solution would be;0.0842 g ÷ 25 mL = 0.00337 g/mL. Now, in the resulting solution, a 1.00 mL aliquot of the stock solution is transferred to a 50.00 mL volumetric flask and diluted to volume. Therefore, the volume of the resulting solution is 50.00 mL. We will substitute these values in the formula, Concentration (mg/L) = (0.00337 g/mL ÷ 50 mL) × 1000 g / 1 mg concentration (mg/L) = 67.4 mg/L. Therefore, the concentration of NaCl in the resulting solution in mg/L NaCl is 67.4 mg/L.7.  Concentration = 67.4 mg/LTolerance = 4.28 mg/LTotal concentration = 67.4 + 4.28 mg/L = 71.68 mg/LWe round off this value to one decimal place; Total concentration = 71.7 mg/LTherefore, the concentration of NaCl in the resulting solution using propagation of error through the calculation is 67.4+0.4 mg/L.8. Two possible sources of random (indeterminate) error in the experiment are; Errors in temperature measurement. Errors in measurement of water volume. Two possible sources of systematic (determinate) error in the experiment are; Incorrect calibration of volumetric glasswareIncorrect mass of NaCl.

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The dew point at 70 degrees depends on the relative humidity. Without that information, it cannot be determined.

The dew point is the temperature at which air becomes saturated with water vapor, leading to the formation of dew.

It represents the point at which the air is no longer able to hold all the moisture it contains, resulting in condensation. The specific dew point at 70 degrees would require additional information, such as the relative humidity.

Relative humidity is the amount of moisture present in the air relative to the maximum amount it can hold at a given temperature. It is expressed as a percentage.

Without knowing the relative humidity, it is not possible to determine the exact dew point at 70 degrees. However, generally speaking, if the air temperature is 70 degrees Fahrenheit and the relative humidity is around 100%, the dew point would be approximately 70 degrees Fahrenheit as well.

This means that if the air temperature drops to 70 degrees or lower, dew would start to form. However, if the relative humidity is lower, the dew point would also be lower, and dew formation would occur at a lower temperature.

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Answer:

(CH3COO)2 + redP + Cl2 → ClCH2COOH + HCl

Explanation:

This is an example of halogenation of carboxylic acids at alpha carbon atom. In this reaction, red phosphorus and chlorine are treated with carboxylic acids having alpha hydrogen atom followed by hydrolysis to form alpha chloro carboxylic acid.

The fact that California is surrounded by water  makes is cooler than Sacramento that is surrounded by land.

We have to note that the features that surround an area is a key factor is determining whether or not the place would be warm or cold. If a place is surrounded by water, the convection of the air would lead to land and sea breeze and make the place to be cooler.

On the other hand for the places that have been surrounded by land, we would notice that the temperature of those areas would tend to be much higher than the islands.

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Answer:

1.28 g

Explanation:

Mass of anhydrous compound/molar mass of anhydrous compound = mass of hydrated compound/ molar mass of hydrated compound

Mass of anhydrous compound = ?

Mass of hydrated compound = 2g

Molar mass of anhydrous compound= 160 g/mol

Molar mass of hydrated compound = 250 g/mol

x/160 = 2/250

250x = 2 ×160

x= 2 × 160/250

x= 1.28 g

The specific values of EL, EC, and ER will determine the precise behavior of the system and the probabilities of the electron being in each state over time.

To study the time evolution in this three-state system, we can write down the Hamiltonian matrix for the system.

The Hamiltonian describes the energy of the system and the transitions between different states. In this case, we have three states ∣L⟩, ∣C⟩, and ∣R⟩.

The Hamiltonian matrix can be written as:

H = [[EL 0 EC],

[0 EC 0],

[EC 0 ER]]

Here, EL represents the energy of state ∣L⟩, EC represents the energy of state ∣C⟩, and ER represents the energy of state ∣R⟩.

Since the electron can hop between the carbon atom and the oxygen atoms, we have nonzero off-diagonal elements in the Hamiltonian.

To solve for the time evolution of the system, we can find the eigenvalues and eigenvectors of the Hamiltonian matrix.

The eigenvectors represent the energy eigenstates of the system, and the eigenvalues represent the corresponding energies.

Once we have the energy eigenstates, we can determine the probabilities of the electron being in each state at a given time by calculating the time evolution of the initial state.

The specific values of EL, EC, and ER will determine the precise behavior of the system and the probabilities of the electron being in each state over time.

It is worth noting that the problem statement doesn't provide explicit values for EL, EC, and ER, so further information is needed to obtain a more detailed analysis of the time evolution in this three-state system.

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Answer:

The answer is option B.

Reduction

Hope this helps you

Answer:

plato answer b

Explanation:

The gravitational potential energy for the object is  9800 J.

The gravitational potential is the scalar amount characteristic of a point in a gravitational field whose slope breaks even with the escalated of the field and rises to the work required to move a body of unit mass from a given point to a point interminably farther.

The formula referred  for calculating the gravitational  potential to the ground level is given by

        U = mgh

where m  is the mass of the object and g is the gravitational constant and last h is the height from the ground where the object is situated.

As we provided with,

g = 9.8 ms-2

m = 200 kg  

h = 5m

So substituting the required values in the formula m we get  

=  200 x 9.8 x 5

=  9800 J

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If the Gibbs free energy change (∆G°) for a reaction is zero, it means that the reaction is in a state of equilibrium, where the forward and reverse reactions are occurring at equal rates.

The equilibrium constant (K) for a chemical reaction is related to the Gibbs free energy change (∆G°) of the reaction through the equation:

∆G° = -RT ln(K)

where R is the gas constant, T is the temperature in Kelvin, and ln is the natural logarithm.

If ∆G° = 0, then:

0 = -RT ln(K)

which means that ln(K) = 0, or K = 1. Therefore, the value of the equilibrium constant for a reaction at equilibrium with ∆G° = 0 is 1.

If we begin the reaction with pure products, the reaction will proceed in the reverse direction until equilibrium is reached, according to Le Chatelier's principle. This means that the concentration of the products will decrease and the concentration of the reactants will increase until the equilibrium constant is reached, which is 1 in this case.

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Answer:

metalloids

Explanation:

I think that is the answer

According to the electronic configuration, group 14 of elements can act as semiconductors.

Electronic configuration is defined as the distribution of electrons which are present in an atom or molecule in atomic or molecular orbitals.It describes how each electron moves independently in an orbital.

Knowledge of electronic configuration is necessary for understanding the structure of periodic table.It helps in understanding the chemical properties of elements.

Elements undergo chemical reactions in order to achieve stability. Main group elements obey the octet rule in their electronic configuration while the transition elements follow the 18 electron rule. Noble elements have valence shell complete in ground state and hence are said to be stable.

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Sodium (Na) has a smaller radius than Cesium (Cs) due to the increase in number of electron shells in Cs compared to Na.

The atomic radius of an element is determined by the number of electron shells it has. As you move down a group in the periodic table, the number of electron shells increases, resulting in larger atomic radius. Sodium and Cesium belong to the same group in the periodic table, but Cesium has one additional electron shell than Sodium.

This increase in the number of electron shells leads to an increase in atomic radius, making Cesium have a larger atomic radius than Sodium. Therefore, Sodium has a smaller radius than Cesium.

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The absorbance reported by the defective instrument was 0.3933.

Absorbance A = - log₁₀ T

Tm = transmittance measured by spectrophotometer

Tm = 0.44

Absorbance reported in this equipment = -log₁₀ (0.44) = 0.35654

True absorbance can be calculated by true transmittance, Tm = T+S(α-T)

S = fraction of stray light = 6%= 6/100 = 0.06

α= 1, ideal case

T = true transmittance of the sample

Tm = T+S(α-T)

now, T= Tm-S/ 1-S = 0.44-0.06/ 1-0.06 = 0.404233

therefore, actual reading measured is A = -log₁₀ T = -log₁₀ (0.404233)

i.e; 0.3933

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I think it's option C and option D but if you can only choose one answer then I think it's option C

Answer:

It is option C

Explanation:

Answer:

charges, & mass

Explanation:

Answer:

A) Oxygen

Explanation:

i just took the test.

Answer: Why don't we feel the air pressing on us all the time?

Explanation:

Because air is a fluid, the weight of the air is transmitted to the palm of your hand and to the back of your hand at the same time. These forces cancel so that your hand overall feels no net force

Answer:the gravity in the atmosphere is pulling all the air so we can survive

Explanation:

Note: in the International System of Units, The kilogram or kilogramme (symbol: kg) is the base unit of mass.

2nd Note:

1 gram = 0.001 Kilograms

72 kilograms converted to grams is 72,000 grams.

333 grams is 0.333 kilograms.

0.23976 is the pizza percentage.

Rounded: 0.24

Therefore, your answer is 0.24

Answer:

                                                    United States

Molecules themselves can move in any direction, they can rotate, and they can vibrate as the atoms within a molecule move back and forth relative to each-other, as if the chemical bonds connecting them were springs. Answer 5: They bounce around and wiggle and jiggle around.

                                                Soviet Union

In terms of actually transporting this east, any and every means was used. Rail was obviously key - the evacuation alone used some 1.5 million rail cars in 1941 - but trucks were also used. Korolev planned to move forward with the Soyuz craft and N-1 heavy booster that would be the basis of a permanent crewed space station and crewed exploration

I’m so sorry if it’s wrong I tried my best

The molarity of the unknown NaOH solution is 0.196 M.

To determine the molarity of the unknown NaOH solution, we can use the concept of stoichiometry and the volume and concentration data provided.

The balanced chemical equation for the reaction between potassium hydrogen phthalate (KHP) and sodium hydroxide (NaOH) is:

KHP + NaOH → H₂O + NaKP

From the equation, we can see that the stoichiometric ratio between KHP and NaOH is 1:1. This means that one mole of NaOH reacts with one mole of KHP.

Given that 15.00 mL of 0.256 M KHP solution is titrated with 20.75 mL of the unknown NaOH solution, we can set up the following equation using the molarity and volume relationship:

(0.256 M KHP) x (15.00 mL KHP) = (Molarity of NaOH) x (20.75 mL NaOH)

Solving for the molarity of NaOH, we find:

Molarity of NaOH = (0.256 M KHP) x (15.00 mL KHP) / (20.75 mL NaOH) ≈ 0.196 M

Therefore, the molarity of the unknown NaOH solution is approximately 0.196 M.

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The correct option is (d) Carbon Dioxide.

Explanation:

The density of air is around 1.2 g/L, which means that any gas with a density above this value is more dense than air.

Carbon dioxide has a density of approximately 1.98 g/L, which is considerably more dense than air (composed of nitrogen and oxygen).

As a result, if a gas sample is determined to be more dense than air, it is likely to be carbon dioxide (CO2), which has a molecular weight of 44 g/mol.

Carbon dioxide is produced in the laboratory by many chemical reactions and is commonly employed in the food and beverage industries, such as carbonating soda and beer.

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According to the concept of diffusion the water will move from 5% salt solution to 15%salt solution.

Diffusion is defined as the process of movement of molecules which takes place under concentration gradient. It helps in movement of substances in and out from the cell.The molecules move from lower concentration region to a higher concentration region till the concentration becomes equal.

There are 2 main types of diffusion:

1) simple diffusion-process in which substances move through a semi-permeable membrane without the aid of transport proteins.

2) facilitated diffusion- It is a passive movement of molecules across cell membrane from higher concentration region to lower concentration.

There are 2 types of facilitated diffusion one is osmosis and dialysis.

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Metal ions present in plasma are excepted to decrease the amount of free CPFX found in plasma (option C).

Metal ions can interact with proteins in various ways, including by binding to specific amino acid residues or affecting protein conformation.

In the case of plasma proteins such as albumin, which can bind to drugs such as ciprofloxacin (CPFX), the presence of metal ions can affect the binding of the drug to the protein.

Based on current knowledge, it is expected that metal ions present in plasma would decrease the amount of CPFX bound to BSA (option B).

This is because metal ions can compete with CPFX for binding sites on the protein, thus reducing the overall amount of drug that can bind to BSA.

Additionally, the presence of metal ions can also decrease the amount of free CPFX found in plasma (option C). This is because metal ions can bind to the drug directly, forming complexes that are no longer available for binding to BSA.

Overall, the effect of metal ions on the binding of CPFX to BSA is likely to be significant, but may vary depending on the specific metal ions present and their concentrations in the plasma.

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The total charge that flows while the battery is being charged is approximately 193,939.39 Coulombs.

To calculate the total charge that flows while the battery is being charged, we can use the relationship between electrical energy, potential difference, and charge.

The electrical energy (E) stored in the battery is given as 64 mega Jules (64 MJ). The potential difference (V) provided by the battery is 330 volts. We know that the energy (E) is equal to the product of the potential difference (V) and the charge (Q):

E = V * Q

Since the charging process is 100% efficient, all the electrical energy supplied is stored in the battery. Therefore, we can rearrange the equation to solve for the charge (Q):

Q = E / V

Substituting the given values, we have:

Q = 64 MJ / 330 V

To perform the calculation, we need to convert mega Jules (MJ) to joules (J) since the SI unit of energy is joules. One mega Joule is equal to 1 million joules:

Q = (64 * 10^6 J) / 330 V

Calculating the division:

Q ≈ 193,939.39 Coulombs

Therefore, the total charge that flows while the battery is being charged is approximately 193,939.39 Coulombs.

This value represents the quantity of electric charge transferred during the charging process, and it indicates the amount of electricity that enters the battery.

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\(LiNO_{3}\)There are 0.075 moles of \(LiNO_{3}\) in 250 mL of a 0.30 M solution.

To determine the number of moles of \(LiNO_{3}\) in 250 mL of a 0.30 M solution, we can use the formula:

moles of solute = concentration (M) x volume (L)

First, we need to convert the volume from milliliters (mL) to liters (L):

250 mL = 0.25 L

Next, we can substitute the given values into the formula:

moles of \(LiNO_{3}\) = 0.30 M x 0.25 L

moles of \(LiNO_{3}\) = 0.075 mol

Therefore, there are 0.075 moles of \(LiNO_{3}\) in 250 mL of a 0.30 M solution.

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The boiling point of the solution in water is 100.128 °C.

The boiling point of a solution can be calculated using the formula:

ΔTb = Kb x molality

Where ΔTb is the change in boiling point, Kb is the boiling point elevation constant for the solvent, and molality is the concentration of solute in the solution.

The molality of the solution can be calculated as follows:

molality = (mass of solute) / (mass of solvent + mass of solute)

For a 25% solution of ethylene glycol, the molality is:

molality = (0.25 x mass of solution) / (mass of solution)

= 0.25 x (mass of ethylene glycol) / (mass of water + mass of ethylene glycol)

The change in boiling point can then be calculated as:

ΔTb = Kb x molality

= 0.512 x 0.25

= 0.128 °C

So the boiling point of the solution is:

Boiling point = normal boiling point of water + ΔTb

= 100 °C + 0.128 °C

= 100.128 °C

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Answer: The answer is B. The pressure inside the tires increased.

Explanation:

The relationship between the pressure, volume, and temperature of a gas is described by the ideal gas law, which is usually written as:

\($$PV = nRT$$\)

where:

- \(\(P\)\) is the pressure,

- \(\(V\)\) is the volume,

- \(\(n\)\) is the number of moles of gas,

- \(\(R\)\) is the ideal gas constant, and

- \(\(T\)\) is the temperature (in Kelvin).

In this case, the volume \(\(V\)\) and the number of moles \(\(n\)\) of air in the tires stay the same. The temperature \(\(T\)\) is increasing. Therefore, for the equation to remain balanced, the pressure \(\(P\)\) must also increase.

So, the answer is B. The pressure inside the tires increased.

The hydrogen can be produced from water using renewable energy sources, which makes it more sustainable.

If we based our energy on hydrogen, two major economic or global problems that could be alleviated are:

1. Climate change: This is a global issue that requires an immediate response. The world needs to move away from carbon-emitting fossil fuels. Burning hydrogen fuel emits only water and does not release greenhouse gases. If the world shifts to hydrogen fuel, it will reduce carbon emissions and help to slow down climate change.

2. Dependence on Oil: Most countries are dependent on oil. The price of oil is volatile, and the demand and supply fluctuate due to political, economic, and weather events. This dependence on oil is a major economic challenge for many countries. If we based our energy on hydrogen, we could reduce our dependence on oil and decrease oil imports, which could significantly improve the economy of countries that do not produce oil.

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Answer:

True

Explanation:

Because density of water decreases as volume increases as mass increases too.

Hence greater loads can be carried.