Suppose someone wanted to build a scale model of the atom with a nucleus 1.4 m in diameter. Randomized Variables d = 1.4 m, 100%.
How far away would the nearest electron need to be in meters?Assume the orbital radius of an electron is 10^
−10 m, while the radius of the nucleus is 10^−15m.

The chemical equation provided is an example of a heterogeneous reversible reaction: 2HgO (s) ⇌ 2Hg (l) + O₂ (g)

In this reaction, solid mercury oxide (HgO) decomposes into liquid mercury (Hg) and gaseous oxygen (O₂), and this process is reversible. That is, under certain conditions, the reaction can proceed in either direction.

The reaction can be represented by an equilibrium constant (K), which is the ratio of the concentrations (or partial pressures) of the products to the reactants, raised to the stoichiometric coefficients:

K = [Hg]²[O₂]/[HgO]²

At equilibrium, the value of K determines the direction in which the reaction will proceed. If K is greater than 1, the equilibrium lies to the right, and there are more products than reactants. If K is less than 1, the equilibrium lies to the left, and there are more reactants than products. If K is equal to 1, the reaction is at equilibrium, and the concentrations (or partial pressures) of the reactants and products are equal.

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The complete question is:

Is the following equation a heterogeneous reversible reaction 2HgO (s) ⇌ 2Hg (l) + O₂ (g)

Salts and sugars work to preserve foods by creating a hypertonic environment. Option A is the correct answer.

In a hypertonic solution, the concentration of solutes outside of cells is higher than that of solutes inside cells. A cell's water is soaked out as a result, and it shrivels up. Option A is the correct answer.

Foods are preserved by salts and sugars by fostering a hypertonic environment. Salts have the power to dry food by drawing water out of it. The salted food is protected by the dryness, which also stops the formation of mold and other infections. By halting the growth of microorganisms, especially foodborne diseases like salmonella, salt protects food. Inhibiting microbial development, sugar generates a hypertonic environment that soaks water out of the meal.

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The complete question is, "Salts and sugars work to preserve foods by creating a:

A) hypertonic environment

B) lower pH

C) depletion of nutrients

D) lower osmotic pressure"

Answer:

C

Explanation:

Iodine ions are oxidized to form iodine when the chlorine gas is bubbled in the solution of potassium iodide.

When chlorine gas is bubbled into a solution of potassium iodide, some amount of the iodide ions are oxidized and changed into iodine which leads to the formation of beautiful violet color of iodine. This colour can be seen as the iodine dissolves in the carbon tetrachloride layer.

While on the other hand, when the high concentration of chlorine is bubbled into the solution of potassium iodide, the iodine reacts and formed iodine monochloride which is ruby red so we can conclude that iodine ions are oxidized to form iodine when the chlorine gas is bubbled in the solution of potassium iodide.

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Answer:

you will die because no air

The speed of the race car in kilometers per minute is approximately 2.66 km/min.

To convert miles per hour to kilometers per hour, we can use the conversion factor;

1 mile = 1.61 kilometers

So, multiplying both sides by 1.61 gives;

1 mile/hour = 1.61 kilometers/hour

Therefore, we can convert 99 miles/hour to kilometers/hour as follows:

99 miles/hour × 1.61 kilometers/mile = 159.39 kilometers/hour

So, the speed of the race car in kilometers per hour is 159.39 km/h.

To convert kilometers per hour to kilometers per minute, we can use the fact that there are 60 minutes in an hour. So;

159.39 kilometers/hour ÷ 60 minutes/hour

= 2.66 kilometers/minute

Therefore, the speed of the car is 2.66 km/min.

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To answer your question, in the electrolysis of a molten mixture of RbF and CaCl2, the product that forms at the negative electrode is Rb metal and F2 gas.

To answer your question, in the electrolysis of a molten mixture of RbF and CaCl2, the product that forms at the negative electrode is Rb metal and F2 gas. This is because the negative electrode, also known as the cathode, attracts positively charged ions, which in this case is Rb+. The Rb+ ions are reduced by gaining electrons from the cathode and form Rb metal. At the same time, the F- ions in the molten mixture are also attracted to the cathode, and they gain electrons to form F2 gas.
On the other hand, the product that forms at the positive electrode, also known as the anode, is Cl2 gas and Ca metal. This is because the positive electrode attracts negatively charged ions, which in this case is Cl-. The Cl- ions are oxidized by losing electrons at the anode to form Cl2 gas. At the same time, the Ca2+ ions in the molten mixture are also attracted to the anode, and they lose electrons to form Ca metal.
It is important to note that in electrolysis, the cathode is the electrode where reduction occurs, while the anode is the electrode where oxidation occurs. Electrodes are conductive materials that allow the flow of electricity and are used in electrolysis to transfer electrons between the solution and the power source.

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Answer:

Pros: No vehicle emissions other than water vapor. Fuel economy equivalent to about twice that of gasoline vehicles. Hydrogen is abundant, and can be made from renewable energy. Cons: This space-age technology is expensive.

Answer:

The pros of hydrogen fuel cells are that they are very efficient, producing very little waste. They are also very stable, which makes them safe to use.

The cons of hydrogen fuel cells are that they can be expensive to produce and maintain, and they require a lot of energy to power them, meaning that they often aren't as efficient as they could be.

Despite these pros and cons, hydrogen fuel cells are still a very promising technology. With more research, attention, and development, they could be a powerful force in the fight against carbon emissions and global warming.

The nuclear reaction process of converting hydrogen nuclei into helium nuclei is called the proton-proton chain.

The proton-proton chain is the primary nuclear reaction process that powers the Sun and other main-sequence stars. It involves the fusion of hydrogen nuclei (protons) to form helium nuclei. The chain consists of several steps, each involving different nuclear reactions.

In the first step of the proton-proton chain, two protons (hydrogen nuclei) come together through the strong nuclear force to form a deuterium nucleus (one proton and one neutron). This step releases a positron and a neutrino as byproducts. In the next step, the deuterium nucleus combines with another proton to form a helium-3 nucleus. This step releases a gamma ray.

The final step of the proton-proton chain involves the fusion of two helium-3 nuclei to produce helium-4 (two protons and two neutrons). This step releases two protons, which can then continue to participate in further reactions. Overall, the proton-proton chain converts four hydrogen nuclei into one helium nucleus, releasing a tremendous amount of energy in the process.

The proton-proton chain is essential for the sustained energy output of stars like the Sun. Without this chain reaction, stars would not be able to generate the immense heat and light that they emit. Understanding the proton-proton chain and other nuclear reactions is crucial for studying stellar evolution and the processes that govern the energy production within stars.

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Answer:

It’s actually 130 degrees Celsius.

Explanation:

O2 is the correct answer.

Explanation:

On a magnetic susceptibility balance, the O2 species will have the strongest mass shift since stronger paramagnetic species will have a larger mass shift.

The oxygen atoms in the O2 species are paramagnetic because unpaired electrons rotate in the same direction, increasing the magnetic field force. As a result, the oxygen atoms with two unpaired electrons will exhibit the largest mass shift on a magnetic susceptibility balance.

The magnitude of the mass shift is -O2, which increases with species paramagneticity. The mass shift increases with species paramagneticity. Therefore, on a magnetic susceptibility balance, oxygen will have the highest mass shift since it has two unpaired electrons in the molecular orbital diagram.

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Answer:

B

P

K

Explanation:

K: 203pm

B: 84pm

P: 107pm

There isn't an E on the Periodic Table?!

The wavelength (in nm) of the photon absorbed for a transition of an electron that results in the least energetic spectral line in ultraviolet series of the H atom is 121.6 nm.

This is derived from the Rydberg formula, which relates the energy levels of an electron in an atom to the wavelength of light emitted or absorbed in the process of an electron transitioning from one level to another. Using the equation E_n = -13.6 eV/n^2, we can find the energy level of the n_initial=1 electron state to be -13.6 eV.

Subtracting this value from the energy level of the n=2 state, which is -3.4 eV, we obtain the energy difference between the two states as 10.2 eV. Using E = hf = hc/λ, where h is Planck's constant (6.626 x 10^-34 Js), c is the speed of light (2.998 x 10^8 m/s), and f is the frequency of the absorbed photon, we can calculate the wavelength of the photon as 121.6 nm.

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Answer:

30

Explanation:

Density = mass over volume

1.35 = m ÷ 22

isolate m

1.35 × 22 = 29.7

2 sig figs

so,

30 grams

The mass of the given gas sample at STP is 28 grams.

The relation between the mass and density of any substance is given by -

M = ρV

Where -

M - mass of body

ρ - density of body

V - volume of body

Given is volume of a gas sample is 22 L at STP. The density of the gas is 1.35 g/L.

We can write -

Volume of gas = [V] = 22 L

density of gas = [D] = 1.3 g/L

Therefore, the mass of the gas will be -

M = ρV

M = 1.3 x 22

M =  28.6 g

Therefore, the mass of the given gas sample at STP is 28 grams.

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Answer:

D

Explanation:

Bases have a bitter taste, slippery when touched and they can form hydronium ions. (they can conduct electricity.)

The evidence that Mendeleev used to decide that the alkali metals should

be in the same group was because they exhibited the same properties.

Alkali metals are found in Group I together with Hydrogen and examples

include potassium, lithium etc  and are the most electropositive sets of

elements.

All require the loss of one electron to attain an octet configuration which

makes them to be very reactive with other elements.

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Answer: 42.14 g

Explanation:      calcium nitrate -  \(Ca(NO_{3} )_{2}\)

                   , the molar mass of calcium nitrate = 164 g

                   mass required =\(0.257*164\)

                                               =\(42.14\) g

Carotene will display the longest wavelength transition in the UV-Vis spectrum.

Carotene will display the longest wavelength transition in the UV-Vis spectrum. This is because carotene contains a long conjugated system of alternating double bonds, which allows for a large delocalized system of electrons. This results in a lower energy transition and longer wavelength in the UV-Vis spectrum. Styrene and butadiene also contain conjugated systems, but they are shorter than carotene. Hexatriene contains a longer conjugated system than styrene and butadiene, but it is still shorter than carotene. Benzene does not contain a conjugated system of double bonds and therefore does not absorb in the UV-Vis region.

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Answers

A and D

Explanation

Biomass fuel is produced from organic materials, so trees and corn plants apply.

Answer:

you can simply answer vl/t1=v2/t2

Answer: Acidophilus (lactobacteria)

Explanation:

This bacteria keeps our gut healthy.

The law that defines the direct proportionality between the concentration of a substance and the amount of radiation it will absorb is known as the Beer-Lambert law.

This law states that the absorption of light or radiation by a substance is proportional to the concentration of the substance and the path length of the radiation through the substance. Mathematically, the Beer-Lambert law is expressed as A = εcl, where A is the absorbance of the substance, ε is the molar absorptivity or extinction coefficient, c is the concentration of the substance, and l is the path length of the radiation. This law is widely used in analytical chemistry and spectroscopy to determine the concentration of substances in solution or to study the interaction of radiation with matter. y = kx.

where k is the proportionality constant.

As a result, the point (x, kx) is the proportionality constant.

Generally speaking, this is the point:

(x, k * f (x))

f (x) is a function that is proportional to x where.

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The chemical symbol of the element with a nucleus charge of +9 is F

The charge of the nucleus is determined by the number of protons it contains, as protons are positively charged particles.

The atomic number of an element refers to the number of protons in its nucleus, and it is represented by a whole number on the periodic table.

Therefore, the chemical symbol of the element whose nucleus has a charge of +9 is based on its atomic number, which is 9. The chemical symbol for this element is "F" for fluorine.

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Answer:

No

Explanation:

I do not know

Explanation:

No because when it was formed it was a rocky lava wasteland

The height of the bin is 29.9m.

The quantity of space enclosing a three-dimensional shape's exterior is its surface area.

The total surface area of the cylinder formula is simply the sum of the base surface area and the lateral surface area.

The radius of the cylinder, r = 5m

Surface area = 1099 m²

∴ A = 2πrh + 2πr²

  \(h = \frac{A- 2\pi r^2}{2\pi r}\)

  \(h = \frac{1099- 2 (3.141) 5^2}{2 (3.141) 5}\)

  \(h = \frac{1099- 157.05}{31.41}\)

  \(h = \frac{941.95}{31.41}\)

  \(h = 29.9 m\)

Therefore, the height of the bin is 29.9m.

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Answer:

A. An indicator added to the solution turns green-blue.

Explanation:

A pH scale measures the concentration of hydrogen ions in acidic and alkaline solutions.

In chemistry, pH literally means the power of hydrogen ions and it is a measure of the molar concentration of hydrogen ions in a particular solution; thus, specifying the acidity, neutrality or basicity of any chemical solution.

Mathematically, the pH of a solution is given by the formula;

\( pH = -log_{10}(H^{+}) \)

On a pH scale, a solution with a pH of 7 is neutral, a solution with a pH below 7 is acidic and it's basic (alkaline) when it's pH is above 7.

A pH indicator can be defined as a compound (substance) that indicates the concentration of hydrogen ions present in a solution by changing its color over a narrow range of pH values.

A pH range of 1 to 3 (1 - 3) represents a strong acid with a red color.

When an indicator added to a solution turns green-blue, it simply means that a weak base is present.

\(\qquad \qquad\huge \underline{\boxed{\sf Answer}}\)

Here's the solution ~

1 mole of NaCl weigh 58 grams

2 moles of NaCl weigh (58 × 2) = 116 grams

therefore, the correct choice is A.)

\(\qquad \sf  \dashrightarrow \: 116 \: g\)

Answer:

See explanation

Explanation:

The to main chemicals that lead to acid rain are SOx and NOx. The major source of oxides of sulphur are power plants while the major source of oxides of nitrogen is the combustion of fossil fuels.

B. There are two types of acid rain; wet and dry. Wet type acid rain occurs when NOx and SOx combine with water vapour in the atmosphere and fall as precipitation while in dry type, wind deposits these acidic gases/matter on the surfaces of buildings, cars, trees etc. Rain water washes off these acidic deposits and the runoff is more acidic than the rain water.

C. Natural rain water has a pH of about 5.5 due to the fact that water dissolve CO2 in the atmosphere. This means that natural rain water is also slightly acidic. Rain water that dissolves SOx or NOx is often more acidic than these hence the term 'enhanced acid rain' may be used.

Again, since precipitation could be solid or liquid, the term 'acid deposition' is better.