Calculate the ph of the resulting solution when 85 mL of 0. 3 M nitric acid is mixed with 75 mL of 0. 2 magnesium hydroxide

Main answer:

The length of the steel rail segment on a hot Utah day at 104 °F would be 25.047 m.

Supporting answer:

The coefficient of linear thermal expansion of steel is approximately 1.2 x 10^-5 /°C. To convert from Fahrenheit to Celsius, we can use the formula:

C = (F - 32) * 5/9

Using this formula, we can convert the initial temperature of 68.0 °F to Celsius:

C1 = (68.0 - 32) * 5/9 = 20.0 °C

Likewise, we can convert the final temperature of 104 °F to Celsius:

C2 = (104 - 32) * 5/9 = 40.0 °C

The change in temperature is therefore:

ΔT = C2 - C1 = 20.0 °C

The change in length of the steel rail segment is given by:

ΔL = αLΔT

where α is the coefficient of linear thermal expansion, L is the original length of the rail segment, and ΔT is the change in temperature.

Plugging in the given values, we get:

ΔL = (1.2 x 10^-5 /°C) * (25.000 m) * (20.0 °C) = 0.006 m

Therefore, the final length of the steel rail segment on a hot Utah day at 104 °F would be:

L2 = L1 + ΔL = 25.000 m + 0.006 m = 25.047 m

It's important to note that thermal expansion is an important phenomenon in many fields of engineering, including civil, mechanical, and aerospace engineering.

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The electric field is turned off, the charged particle travels on a circular path whose radius is 4.36 cm. The charge-to-mass ratio of the particle 6.819*10⁵ c/kg

F=Fe+Fb=0

qvB=qE

v=E/b

Fr=Fb=qvB=mv²/R

qvb=mv²/R

v=qBR/m

v=E/B

q/m=E/RB²=6.819*10⁵ c/kg

Consequently, an atom can be either positive, negative, or neutral. After receiving an electron from another atom, the charged particle becomes negative. If an electron is removed from it, it becomes positively charged. Applications of charged particles are susceptible to electric field and magnetic field management of their motion and energy. According to this definition, a charged particle is a particle that has an electric charge. At the atomic level, an atom consists of a nucleus that the electrons orbit. Protons and neutrons combine to create the nucleus, which has a positive charge. Any charged atom or molecule is an ion. It has a charge because the atom or molecule's number of protons and electrons is not equal. Positivity can be added to an atom.

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"A value of 0 means no energy is absorbed by the object, whereas a value of 1 means that all of the energy is absorbed" is the statement Hannah has to change.

What is Albedo Effect?

Albedo is a measure of how well surfaces reflect sunlight (heat from the sun). Large portions of the sun's rays are reflected back into the atmosphere by light-colored surfaces (high albedo). The sun's beams are absorbed by dark surfaces (low albedo).

An ice-covered Arctic reflects solar energy that would otherwise be absorbed by the oceans and raise the surface temperature of the Earth. Areas covered in snow and ice have high albedo values. How much of the incoming solar radiation is reflected or absorbed depends significantly on how much of the Earth's surface is covered by snow and ice. Dark surfaces with low albedo absorb more energy, which causes heat. Additionally, as additional ice and snow melts.

Hannah should have written instead," an object with a value of 1 absorbs no energy whereas one with a value of 0 absorbs all of the energy".

Question :

Hannah is writing a report on how albedo affects the global climate. She’s proofreading her passage for any factual errors. Which sentence must Hannah correct before submitting her report?

Earth receives energy from the Sun. This energy drives many of the processes on Earth, including its climate. Some part of this energy is reflected by Earth’s surface. We use the term albedo to describe the reflected energy. Albedo of an object is the ratio of the reflected radiation to the total radiation reaching the object. A value of 0 means no energy is absorbed by the object, whereas a value of 1 means that all of the energy is absorbed. In this way, the albedo of an object can influence Earth’s atmospheric temperature.

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suppose mol of electrons must be transported from one side of an electrochemical cell to another in minutes. the size of electric current that must flow is   104.54 A.

Suppose 650 mmol of electrons must be transported from one side of an electro chemical cell to another in 10.0 minutes Then, we have to calculate the size of electric current that must flow. Then we know that Current I = Charge(q) / time(t), Charge = mols of e-x charge of electron = (0.650 mol of e-) x (96500 C/mol of e-) = 62725 C. now, time in seconds t = 10 min = 10 min x 60 s/ min = 600 s therefore, I = C/t = (62725)/600

| = 104.54 C/s, Also, 1 C/s = 1 Amp. Hence, I = 104.54 A. A torrent of particles, such as ions or electrons travelling through an electrically conducting or a vacuum is called as an electric current. The net rate of electric charge passing throughout a surface or through a control volume is how it is determined. Electric current is a term that refers to how so much electricity to flow across a circuit and how it flows in an electronic circuit. Amperes are employed to measure it (A). More and more electricity going through the circuit, the greater the ampere value.

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Answer:

Volume of sphere A = 2 mL

Volume of sphere B = 8 mL

The volume of sphere B is 4 times the volume of sphere A.

Explanation:

We'll begin by calculating the volume of each sphere.

Data obtained from the question include:

Sphere A:

Mass = 24 g

Density = 12 g/mL

Volume =?

Sphere B:

Mass = 24 g

Density = 3 g/mL

Volume =?

Next, we shall determine the volume of each sphere. This can be obtained as follow:

For sphere A:

Density = mass /volume

12 = 24/volume

Cross multiply

12 × volume = 24

Divide both side by 12

Volume = 24/12

Volume = 2 mL

For sphere B:

Density = mass /volume

3 = 24/volume

Cross multiply

3 × volume = 24

Divide both side by 3

Volume = 24/3

Volume = 8 mL

Summary:

Volume of sphere A = 2 mL

Volume of sphere B = 8 mL

Comparing the volume of both sphere, we have:

Va /Vb = 2/8

Va /Vb = 1/4

Cross multiply

Va × 4 = Vb

Vb = 4Va

From the above illustration,

The volume of sphere B is 4 times the volume of sphere A.

It has been concluded that the volume of sphere A has been 4 times greater than the volume of sphere B.

Density can be defined as the mass per unit volume. Density can be expressed as:

Density = \(\rm \dfrac{Mass}{Volume}\)

Sphere A has a mass of 24 grams, and a density of 12 g/ml.

Sphere B has a mass of 24 grams and a density of 3 g/ml.

Since the spheres have the same mass, the relationship can be given as:

Density of A × Volume of A = Density of B × Volume of B

12 × Volume of A = 3 × Volume of B

4 × Volume of A = Volume of B

Thus, it has been concluded that the volume of sphere A has been 4 times greater than the volume of sphere B.

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Answer:

See explanation

Explanation:

Newton's optics experiment observation and intervention. Newton made observations using the principle of light passing through prisms and the rays that were transmitted through them. It was revealed that light has a variety of properties and features.

The key experiment performed by Newton was reflecting light onto a piece of wood with a small hole drilled into it. He was able to create a pure-colored light beam in this way. He was able to demonstrate, for instance, that blue light produced solely blue light when it was refracted through a second prism.

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Answer:

Sap?

Explanation:

When basket ball is dropped from a height, its potential energy decreases and its kinetic energy increases till it reaches the ground. The highest kinetic energy is at ground level.

The energy that an object has as a result of motion is known as kinetic energy. It is described as the effort required to move a mass-determined body from rest to the indicated velocity. The body holds onto the kinetic energy it acquired during its acceleration until its speed changes.

A ball drops from the top of a building and picks up speed as it descends. Its speed is increasing by 10 m/s every second. What we refer to as motion with constant acceleration is, for example, a ball falling due to gravity.

Thus, The highest kinetic energy is at ground level.

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Answer: C

Explanation: The evaporation rate depends on the exposed surface of liquid as long as both glasses stay at the same temperature. Since both glasses have the same surface area, they should both evaporate at the same rate.

Water pollution is described as the presence of toxins in water sources that make it unsafe for use in drinking, cooking, cleaning, swimming, and other activities.

Pollutants include things like chemicals, trash, bacteria, and parasites. All pollution eventually finds its way into the water.

The Clean Water Act is what?

The Clean Water Act (CWA) establishes the fundamental framework for policing pollutant discharges into US waters as well as standards for the cleanliness of surface waters.

The CWA is thought to have its roots in the Federal Water Pollution Control Act, which was approved in 1948 but underwent considerable revisions and expansion in 1972. The Act's common name was modified to "Clean Water Act" with revisions in 1972.

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Taking into account the reaction stoichiometry, the correct answer is option A. if 23.5 grams of potassium are reacted with excess water, 33.7 grams of KOH will be formed.

The balanced reaction is:

2 K + 2 H₂O → 2 KOH + H₂

By reaction stoichiometry, the following amounts of moles of each compound participate in the reaction:

K: 2 moles

H₂O: 2 moles

KOH: 2 moles

H₂: 1 mole

The molar mass of the compounds is:

By reaction stoichiometry, the following mass quantities of each compound participate in the reaction:

It can be applied the following rule of three: if by reaction stoichiometry 78.2 grams of K form 112.2 grams of KOH, 23.5 grams of K form how much mass of KOH?

mass of KOH= (23.5 grams of K× 112.2 grams of KOH) ÷78.2 grams of K

mass of KOH= 33.7 grams

Finally, 33.7 grams of KOH are formed.

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Answer:

SeCl6

this is the correct formula.

The correct formula for selenium hexachloride is SeCl₆.

What is selenium hexachloride

Selenium hexachloride is a compound composed of one selenium atom (Se) and six chlorine atoms (Cl). The prefix "hexa-" indicates that there are six chlorine atoms bonded to the selenium atom.

The chemical formula SeCl₆ represents the composition of selenium hexachloride, indicating that there are six chlorine atoms bonded to one selenium atom.

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Answer:

Explanation:

The new pressure can be found by using the formula for Boyle's law which is

\(P_1V_1 = P_2V_2\)

Since we're finding the new pressure

\(P_2 = \frac{P_1V_1}{V_2} \\\)

We have

\(P_2 = \frac{0.5 \times 150}{75} = \frac{75}{75} = 1 \\ \)

We have the final answer as

Hope this helps you

Answer:

Wouldn’t it be Oxidane, water?

Answer:b

Explanation:

In the Lewis structure of CHI3, the central carbon atom has no lone pairs of electrons. All of its valence electrons are used in bonding to the three hydrogen atoms and one chlorine atom.

A carbon atom that is in the middle of a molecule or complex is referred to as the central carbon atom. Because it can create four chemical connections with other atoms, carbon is a special element that may be used to create a wide range of intricate structures. The characteristics and reactivity of an organic compound are largely determined by its central carbon atoms, which are frequently the skeleton of the complex. In functional groups with particular chemical characteristics like alcohols, carboxylic acids, and amines, central carbon atoms are frequently encountered in organic chemistry. Additionally, central carbon atoms may be found in biomolecules like proteins and nucleic acids, where they serve significant structural and functional functions. Generally speaking, central carbon atoms are necessary for

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It contains the first carbon-carbon double bond on the third carbon from the omega end of the carbon chain. The correct answer is option. a.

This means that the first double bond in the fatty acid carbon chain is located at the third carbon from the end of the chain opposite to the carboxyl group, which is known as the omega end. Omega-3 fatty acids are a type of polyunsaturated fatty acid that are important for human health, and are commonly found in fish, flaxseed, and other plant and animal sources. They have been shown to have numerous health benefits, including reducing inflammation and improving heart health. Hence option a is correct answer.

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What is the chemical structure of an omega-3 fatty acid?

Multiple choice question.

a. It contains the first carbon-carbon double bond on the third carbon from the omega end of the carbon chain.

b. It contains the first carbon-carbon double bond on the third carbon from the acid end of the carbon chain.

c. It contains three consecutive carbon-carbon double bonds within the carbon chain.

Substances that dissociate in water and give up OH-ions (hydroxide ions) are considered base

What is a base?

To be considered as a substance that dissociates in water and gives up hydroxide ions (OH-), the substance must dissociate in water to produce hydroxide ions and hydrogen ions (H+). These substances are also known as bases.

When a base is dissolved in water, it will increase the concentration of hydroxide ions and decrease the concentration of hydrogen ions, making the solution more alkaline. Examples of substances that dissociate in water and give up hydroxide ions include sodium hydroxide (NaOH), potassium hydroxide (KOH), and calcium hydroxide (Ca(OH)2).

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   Adding more oxygen gas to rusting iron metal will increase the reaction rate. This is because the rate of the reaction depends on the concentration of the reactants. By adding more oxygen gas, the concentration of oxygen molecules will increase, which will result in more frequent collisions between iron and oxygen molecules. This, in turn, will increase the rate of the reaction and the formation of rust.

   Putting a beaker of reacting nitric acid and sodium hydroxide into the refrigerator will decrease the reaction rate. This is because the rate of the reaction is dependent on temperature. Lowering the temperature will decrease the kinetic energy of the molecules, which will decrease the frequency of collisions between the nitric acid and sodium hydroxide molecules, leading to a slower reaction rate.

Answer: check explanation my son

Explanation: 1. Adding more oxygen gas to rusting iron metal will increase the reaction rate. This is because oxygen is a reactant in the rusting reaction and by increasing the amount of oxygen, there will be more molecules available to collide and react with the iron metal, resulting in an increased rate of reaction.

2. Putting a beaker of reacting nitric acid and sodium hydroxide into the refrigerator will decrease the reaction rate. This is because the colder temperature will reduce the kinetic energy of the molecules, causing them to collide less frequently and slowing down the rate of reaction.

Answer:

CH3CH3, 1,3- dichloro-2,2- dibromo, 2-butyne, cyclopentane, 2,3- dimethylbut-2-ene, 2,2,4,4- tetramethlpenta-3-one.

Explanation:

This problem or question has to do with spectroscopy. Spectroscopy is one of the Important aspect of physical Chemistry. It is important because it helps in the identification of chemical samples or compounds. The Nuclear Magnetic field work generally on the principle of absorption of energy.

The following compounds as given in the question above shows singlet in the 1H NMR spectrum.

(1). CH3CH3: shows singlet in the 1H NMR spectrum at 0.86 ppm.

(2). 1,3- dichloro-2,2- dibromo; shows singlet.

(3). 2- butyne shows singlet

(4). Cyclopentane shows singlet.

(5). 2,3 - dimethylbut-2-ene shows singlet.

(6). 2,2,4,4- tetramethlpenta-3-one shows singlet.

Kindly note that I have used the IUPAC naming system to name the Compounds in the question above.

Answer:

arbon monoxide reacts with oxygen to produce carbon dioxide. Write the balanced chemical equation for this reaction.

...

Example.

Step Result Equation balanced?

1 carbon monoxide + oxygen → carbon dioxide

2 CO + O 2 → CO 2

3 Reactants: 1 × C, (1 × O) + (2 × O) = 3 × O. Products: 1 × C, 2 × O Not balanced.

4 2CO + O 2 → CO

Answer:

This can't be answered without any information about the experiment itself. However, the explanation below may be able to help you answer it.

Explanation:

The independent variable is the one thing you change in the experiment. e.g. the type of liquid used to water a plant

The dependent variable is the thing you measure due to the indepent variable changing. e.g. the height the of the plant

Controlled variables is everything in the experiment (except for the independent variable and dependent variable) that are kept constant (the same) throughout the entire experiment. They must not be changed. e.g. Type of plant used, pot size, amount of liquid, soil type etc.

Answer:

That should be crucible tong

Omitted options and they are

a) pure compound.

b. pure element.

c. pure substance.

d. homogeneous solution.

e. heterogeneous solution

Answer:d. homogeneous solution.

Explanation:

Pure substances or  elements or  compounds have a definite and sharp melting or boiling point, Any substance that is not pure is impure and will have different temperature of melting or boiling points.

To this effect, the clear colorless liquid cannot be a Pure substance, element or compound.

We can therefore say that the clear colorless liquid would be a homogeneous solution because a homogeneous solution is a mixture of constituents which completely mixes together such that each constituents cannot be seen with naked eye, When heated to boiling, each constituent in the mixture will give different boiling points.

A heterogeneous Solution, too is a mixture but contains constituents that can be seen and not a clear colourless solution.

Therefore  On the basis of this information, we can say that the material in the beaker was a Homogeneous solution

The substance must be a homogeneous solution since it is a colorless liquid.

The boiling point of a solution is the temperature at which the atmospheric pressure equals the pressure of the liquid. We must note that a pure substance has a sharp boiling point.

A homogeneous solution is a solution that constitutes only one phase. A solution usually boil over a range of temperature hence the substance must be a homogeneous solution since it is a colorless liquid.

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In determining the greater source of error in the experimentally determined density of the metal cylinder, we need to consider the mass and the volume.

The mass and volume are both measured quantities, and any errors in these measurements can contribute to the overall error in the density calculation. However, in this case, the greater source of error is likely the volume measurement.

The volume of the metal cylinder is determined by measuring its dimensions, such as length, width, and height. These measurements are subject to uncertainties due to various factors, such as parallax errors or limitations of the measuring instrument. Even small errors in the measurements of length, width, or height can result in significant differences in volume when multiplied together.

On the other hand, the mass measurement of the metal cylinder is typically more precise and less prone to errors. Using a balance with a high level of accuracy, the mass can be measured directly without much uncertainty.

To minimize the error in the experimentally determined density, it is crucial to ensure accurate measurements of the volume. This can be achieved by using precise measuring instruments, taking multiple measurements, and averaging the results. Additionally, techniques like using a water displacement method can provide a more accurate volume measurement.

In conclusion, while both the mass and volume measurements contribute to the overall error in the experimentally determined density, the volume measurement is likely the greater source of error due to the inherent uncertainties in measuring dimensions accurately.

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Carbonated water is used makes sprite a substitute for egg in baking

Carbonated water can add moisture to recipes, but it also works as a great leavening agent

What is carbonated water ?

Carbonated water (soda water, bottled water, sparkling water, club soda, gassed water, also known as bottled water in many places, especially in the United States as seltzer or seltzer water) contains dissolved carbon dioxide. It is also water containing gas. It is artificially injected under pressure or occurs by natural geological processes. Carbonation creates tiny bubbles, giving the water a carbonation quality. Common forms include sparkling natural mineral water, club soda, and commercial sparkling water.

Carbonated water can add moisture to recipes, but it also works as a great leavening agent. Carbonation traps air bubbles and makes the finished product light and fluffy. You can substitute 60 grams of sparkling water per egg. This alternative is great for cakes, cupcakes and quick breads

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Answer: When you add an electron to zinc, it needs some extra energy. This is because zinc atoms naturally don't like having an extra electron. The extra electron and the electrons already present in zinc repel each other due to their negative charges. So, you have to give some energy to the zinc atom to overcome this repulsion and make it accept the additional electron. Basically, energy input is required to make zinc accept an extra electron because the electron doesn't fit easily and needs some force to be added.

Explanation: hope this helps