which of the following are NOT correctly balanced reactions?

Following are the effects of acid rain.

What is Acid Rain?

Acid rain is caused by the accumulation of nitric and sulfuric acids in the atmosphere. These compounds are strong acids and are very soluble in water, dissolving in droplets in clouds.

Limestone effect:

Calcium carbonate, [Ca][CO3], is a very common mineral. A limestone is a well-known form of calcium carbonate. The acid contained in acid rain reacts with carbonate ions and promotes the dissolution of calcium carbonate.

This will create a bicarbonate solution. The presence of limestone and other calcium carbonates in lakes and streams helps maintain a constant pH as the mineral reacts with excess acidity. However, acid rain can eventually exceed the buffering capacity of surface waters.

How does acid rain affect buildings made of marble and limestone?

It is mainly affected in 2 ways: dissolution and alteration. Calcite dissolves when sulfuric, sulfuric and nitric acids in polluted air react with calcite in marble and limestone. Exposed areas of buildings and statues show rough surfaces, worn materials, and loss of sculptural detail. Stoneface material can be lost anywhere or only in more reactive areas.

Hence, this is how acid rain affects.

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Answer:

Cobalt-60 i think and i hope

The sample response is : how do mass and the type of material affect thermal energy transfer?

So one need to have include the below factors in your answer:

The mass of an object influences allure thermal strength transfer traits. Generally, objects accompanying best public have greater warm strength depository volume.

They can absorb more heat strength before experience a meaningful change in hotness. If an equal amount of heat is used to both objects, the object accompanying better mass will demand more heat strength to raise allure temperature distinguished to the object accompanying tinier mass .

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. In this experiment, you need to examine the idea of the thermal energy transfer. Using a controlled experiment, what might a good question about the variables that affect thermal energy transfer be? Thermal energy transfer depends on many properties, be limit your question to only two. What did you include in your question?

The final temperature of the metal is 1.88°C, while the final temperature of water is 50°C. The final temperature of both is 25.94°C (average of 1.88°C and 50°C).

To answer the question, it is necessary to use the formula: Q = m * c * ΔT. The formula is used to calculate the amount of heat gained or lost by a substance. Here, the heat lost by the metal will be equal to the heat gained by water. Let's use the following terms in our answer:
- ΔT: change in temperature
- m: mass of substance
- c: specific heat capacity

Initially, the metal has a higher temperature, while the water has a lower temperature. Heat energy will flow from the metal to the water until both substances reach a common temperature.

The rate of heat transfer will be directly proportional to the difference in temperature between the two substances. To observe the increase in temperature every 60 seconds for 300 seconds, we will make a table with time intervals and corresponding temperature readings.

Finally, we can use the formula to find the final temperature of the metal and water. Let's assume that the mass of water and metal are equal, and both are 100 grams. The specific heat capacity of water is 4.18 J/g °C, while the specific heat capacity of the metal is 0.91 J/g °C.

Heat lost by metal = Heat gained by waterm * c * ΔT(metal) = m * c * ΔT(water)100 * 0.91 * (50 - T) = 100 * 4.18 * (T - 20) 4550 - 91T = 418T - 8364.37T = 83.64T = 1.88°C

Therefore, the final temperature of the metal is 1.88°C, while the final temperature of water is 50°C. The final temperature of both is 25.94°C (average of 1.88°C and 50°C).

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Answer:

The first one

Explanation:

This problem is providing us with the mass and density of a sample of liquid magnesium as 0.015 g and 1.738 g/cm³, respectively. Thus the volume, in microliters, of this same is required and found to be 8.63 μL according to the following calculations:

In science, density is defined as the degree of compactness of a substance and is calculated with:

\(\rho =\frac{m}{V} \)

Thus, given both the mass and density, we can solve for the volume as shown below:

\(V=\frac{m}{\rho } \)

By plugging in, we obtain the answer in cm³ first:

\(V=\frac{0.015g}{1.738g/cm^3} =0.0086cm^3\)

Then, we convert it to microliters as follows:

\(0.0086cm^3*\frac{1L}{1000cm^3} *\frac{1x10^6\mu L}{1L}=8.63\mu L \)

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Answer:

• This is because Sodium is a metal so it loses its one outermost electron to chlorine which is a non metal

Explanation:

An ionic bond is a bond formed between a metal and a non metal after sharing electrons in order to gain stability.

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Answer:

Sodium is metal and Chlorine is a non-metal

Explanation:

An ionic bond is a bond between a metal and a non-metal and also when Na combines with Cl it forms a complete duplex structure making the compound NaCl stable

Answer

Explanation

Consider the reaction below at equilibrium:

The equilibrium constant, Kc for the above reaction is:

Answer:

false

Explanation:

Answer:

false

Explanation:

It is necessary for astronauts on the International Space Station to generate and recycle oxygen because There is not enough oxygen in space to sustain life.

The correct answer choice is" There is not enough oxygen in space to sustain life."

In space, there is no breathable air as there is on Earth, and the amount of oxygen available is limited. Astronauts need a constant supply of oxygen to breathe and to sustain their bodily functions.

Therefore, the International Space Station has a closed-loop life support system that generates and recycles oxygen. This system converts carbon dioxide exhaled by the astronauts into oxygen through a process called electrolysis.

The generated oxygen is then supplied back into the station's atmosphere. This process helps ensure that the astronauts have a constant supply of breathable air and can survive in the space station for extended periods of time.

Therefore "There is not enough oxygen in space to sustain life." is the correct answer.

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Answer:

It's probably claim 3

Explanation:

It's not claim 1 because the amount of energy from the sun can't change and claim 2 doesn't really make sense.

The mobility of atoms and molecules is increased when energy is added (heating), raising the temperature. By removing energy (cooling), atoms and molecules slow down and the temperature drops as a result.

A molecular orbital is a one electron wave function, which is what is meant by the term "molecular level." The molecular levels and orbitals are related (HOMO, LUMO etc).

Methods based on molecular mechanics are frequently used to calculate the precise structures and energy of molecules.

The technique makes use of the core ideas of vibrational spectroscopy and the notion that bonds have natural lengths and angles, and that molecules will select geometries that can best achieve these natural values.

Thus, All the electrons in the molecule combine to form the wave function known as molecular states.

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Answer:

795.702

Explanation:

Option D, W3+ (g) → W4+ (g) + e-, requires the most energy for the ionization process.

The ionization interaction that requires the most energy is choice D, where W3+ (g) is ionized to W4+ (g) by the deficiency of one electron. This is on the grounds that the energy expected to eliminate an electron from a particle increments as the particle turns out to be all the more decidedly charged. Hence, it takes more energy to eliminate an electron from W3+ (g) than it does from W+(g), W2+ (g), or W3+ (g).

Choice An includes the expulsion of one electron from an impartial tungsten iota, and choice B includes eliminating an electron from W+. Choice C includes eliminating an electron from W2+. These ionization processes require less energy than choice D in light of the fact that the ionization energy increments as the particle turns out to be all the more emphatically charged. Hence, the ionization energy expected to eliminate an electron from W3+ is more prominent than that expected to eliminate an electron from any of the past particles.

Subsequently, choice D, W3+ (g) → W4+ (g) + e-, requires the most energy for the ionization interaction.

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Answer:

220.1 grams of CO2.

2.32 atoms are there in 1.4 x 10²⁴. The smallest unit of matter with properties like chemical elements is the atom.

The atom represents the smallest portion of material that may be split without producing particles with an electrical charge. Essentially a result, an atom acts as the basic building block of chemistry. An atom is mostly made of space. The remaining material consists of a negatively charged cloud of electrons revolving about a positively charged nucleus composed of protons plus neutrons.

Number of atoms = 1.4 x 10²⁴/ 6.022×10²³

                               = 2.32 atoms

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Answer:

a) the percentage yield will exceed 100%

b) the excess reactant is filtered along with the barium sulphate precipitate. It is possible to recover the excess reactant by carefully washing the precipitate with water.

Explanation:

In the precipitation of barium sulphate, the ions in the reactants exchange partners in the product leading to an insoluble product.

In every reaction, there is a limiting reactant whose amount determines the amount of product that can be obtained. The reactant in excess remains in the system even after the reaction is completed and may be recovered alongside the product which leads to a percentage yield above 100%.

If the excess reactant is soluble in water, it can be recovered from the precipitate if needed by washing the precipitate with water.

The maximum distance between the two white balls is 2R, and the maximum angle between them is 180 degrees (or π radians).

Maximum distance between the balls:

The maximum distance between the two white balls will be achieved when they are placed at opposite ends of a diameter of the circular region.

In this case, the distance between them will be equal to the diameter of the circle, which is 2R.

Maximum angle between the balls:

To find the maximum angle between the two balls, imagine the center of the circle as the vertex of the angle, and the positions of the two balls as the endpoints of the angle's two sides.

Since the balls are located at opposite ends of a diameter, the angle formed will be a straight angle, which is 180 degrees (or π radians).

So, the maximum distance between the two white balls is 2R, and the maximum angle between them is 180 degrees (or π radians).

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Two white balls, A and B, are placed on a flat surface inside a circular region of radius R. What is the maximum distance and maximum angle between the balls that can be achieved

Answer:

Ca is a reducing agent and O is the oxidizing agent.

Explanation:

calcium is the reducing agent as it reduces oxygen while it oxidize itself and oxygen is an oxidising agent because it oxidized others and reduces itself. in this equation oxygen is reducing and Calcium is oxidising. and as it is stated in the definition that oxidizing agent is the agent which oxidises others and reduces itself and it is also stated that reducing agent reduces others and oxidize itself. so based on this statement calcium is reducing agent and O is a oxidizing agent.

Answer:

Oxidation half equation;

3Cd(s) -------> 3Cd^2+(aq) + 6e

Reduction half equation;

2In^3+(aq) + 6e -----> 2In(s)

Explanation:

Since the reduction potentials of Indium and Cadmium are -0.34 V and - 0.40 V respectively, we can see that cadmium will be oxidized while indium will the reduced.

We arrived at this conclusion by examining the reduction potential of both species. The specie with more negative reduction potential is oxidized in the process.

Oxidation half equation;

3Cd(s) -------> 3Cd^2+(aq) + 6e

Reduction half equation;

2In^3+(aq) + 6e -----> 2In(s)

When molecules begin to react, then the rate of the forward reaction is faster than the rate of reverse reaction: true

When molecules begin to react, rate of the forward reaction is faster than  reverse reaction. As reactants are consumed and products accumulated, the rate of the forward reaction decreases and rate of the reverse reaction increases.

Greater is the activation energy, slower is the reaction. Therefore, reverse reaction, for the exothermic reaction, has a greater activation energy than the forward reaction. Therefore, the reverse reaction proceeds at a slower rate than the forward reaction.

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Answer:20 mi/s

Explanation:

Answer:Yes

Explanation:

Because Chinstrap penguins eat krills

The technique that wildlife photography experts use to put the focus on their subjects in the middle ground is called Deep Focus.

A narrow aperture is typically used to produce deep focus. Because a camera's aperture regulates how much light enters the lens, obtaining deep focus necessitates a bright picture or a lengthy exposure. A wide-angle lens also sharpens a bigger section of the image.

Deep focus in cinematography maintains a tight focus on all parts of an image, catching crucial actions in both the front and background.

Deep focus is used by directors for situations with significant movement in both the front and background of the frame. This type of staging is known as "deep space" or "deep staging" by directors because it involves the placing of performers, props, and set elements at tremendous depth.

A filmmaker must be able to capture a well-defined image for such a shot to succeed. Such sharpness is possible with a deep-focus photo.

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Answer:

Explanation:

i) in keeping industrial machine cool

ii) in textile inustries for dying clothes

It is the 4th scenario is the dependent event. There are 7 gold tokens and 4 silver tokens in a cup. The first student randomly draws a gold token and keeps it. A second student randomly draws a gold token from the cup.

The fouth scenario is a dependent event because the probability of the second student drawing a gold token is affected by the outcome of the first student's draw.

If the first student draws a gold token, then there are only 6 gold tokens left in the cup, the probability changes. but  if the first student does not draw a gold token, then there are 7 gold tokens left in the cup, the probability will remain the same

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The specific heat of the solid is 4.2 J/g/°C and the specific heat of the liquid is 36.3 J/g/°C.

In this case, we know that the mass of the solid is 9.80 g, the change in temperature is 235 °C, and the heat added is 10,000 J. We can solve for the specific heat of the solid as follows:

c = Q / m ΔT

= 10,000 J / 9.80 g / 235 °C

= 4.2 J/g/°C

The latent heat of fusion for the unknown material is 334 J/g. We can now calculate the heat required to melt the solid as follows:

Q = mLf

= 9.80 g * 334 J/g

= 32,832 J

The total heat added to the liquid is 10,000 J + 32,832 J = 42,832 J. The change in temperature of the liquid is 235 °C - 20 °C = 115 °C. We can now calculate the specific heat of the liquid as follows:

c = Q / m ΔT

= 42,832 J / 9.80 g / 115 °C

= 36.3 J/g/°C

Therefore, the specific heat of the solid is 4.2 J/g/°C and the specific heat of the liquid is 36.3 J/g/°C.

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An experiment is performed on an unknown material and produces the given heat curve. The temperature of the material is shown as a function of heat added. Other experiments determine that the material has a temperature of fusion of fusion=235 °C and a temperature of vaporization of vapor=471 °C.

If the sample of material has a mass of =9.80 g, calculate the specific heat when this material is a solid, s, and when it is liquid, l.

Explanation:

Facilitar el movimiento y desplazamiento de objetos pesados reduciendo el rose del objeto contra el suelo, Obtener un movimiento circular por efecto de la fuerza de un liquido, en el caso de contadores, molinos, centrales hidroeléctricas y turbinas.

Transmitir el movimiento de un eje a otro como en el caso de las lavadoras, bicicletas y neveras. Reducir drásticamente el esfuerzo necesario para elevar y mover objetos, como en casos de pozos de agua y ascensores Transformar movimientos giratorios en otros movimientos o viceversa. ,