When fat comes in contact with sodium hydroxide, it produces soap and glycerin. Determine whether this is a physical change or a chemical change. Explain your

Answer:

100 joules​

Explanation:

The mechanical energy (M.E) of an object describes the objects ability to do work. The mechanical energy encompasses the object's energy due to its position (potential energy) and its energy due to motion (kinetic energy).

Therefore,

M.E = K.E + P.E

According to this question, potential energy (P.E) of the roller coaster is 50J and the kinetic energy (K.E) is also 50J. Hence, the mechanical energy (M.E) is

M.E = 50J + 50J

M.E = 100J

If the P.E and K.E of a roller coaster is 50 Joules respectively, the mechanical energy of the roller coaster is 100 Joules.

Given the following data:

To find the mechanical energy of the roller coaster:

The mechanical energy of a physical object or body is the total sum of the potential energy (P.E) and kinetic energy (K.E) possessed by an object.

Mathematically, mechanical energy is given by the formula;

Substituting the given parameters into the formula, we have;

\(M.E = 50 + 50\)

Mechanical energy (M.E) = 100 Joules.

Therefore, the mechanical energy of the roller coaster is 100 Joules.

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Answer:

\(m_{Ag}=2,265.9g\)

Explanation:

Hello!

In this case, since the definition of entropy in a random mixture is:

\(\Delta S=-n_TR\Sigma[x_i*ln(x_i)]\)

For this silver-gold mixture we write:

\(\Delta S=-(n_{Au}+n_{Ag})R\Sigma[\frac{n_{Au}}{n_{Au}+n_{Ag}} *ln(\frac{n_{Au}}{n_{Au}+n_{Ag}} )+\frac{n_{Ag}}{n_{Au}+n_{Ag}} *ln(\frac{n_{Ag}}{n_{Au}+n_{Ag}} )]\)

By knowing the moles of gold:

\(n_{Au}=100g*\frac{1mol}{197g} =0.508mol\)

It is possible to write the aforementioned formula in terms of the variable \(x\) representing the moles of silver:

\(20\frac{J}{mol}=-(0.508+x)8.314\frac{J}{mol*K} \Sigma[\frac{0.508}{0.508+x} *ln(\frac{0.508}{0.508+x} )+\frac{x}{0.508+x} *ln(\frac{x}{0.508+x} )]\)

Which can be solved via Newton-Raphson or a solver software, in this case, I will provide you the answer:

\(x=n_{Ag}=21.0molAg\)

So the mass is:

\(m_{Ag}=21.0mol*\frac{107.9g}{1mol}\\ \\m_{Ag}=2,265.9g\)

Best regards!

The rate of a chymotrypsin-catalyzed reaction will increase by using more

enzyme in the reaction mixture.

The rate of a chemical reaction and the enzyme concentration have a direct

relationship. As concentration increases, the rate of a chemical reaction  

also increases and vice versa.

In this scenario, we were told more enzyme was used in the reaction mixture

which signifies an increase in the concentration and a corresponding

increase in the rate of reaction.

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Answer:

its pb because it has large number of electrons

hope it helps you

Answer:

its pb glad to help!

Explanation:

Answer:

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CONTENTS

PHYSICAL GEOLOGY

Chapter 2 Minerals

2.1 Electrons, Protons, Neutrons, and Atoms

All matter, including mineral crystals, is made up of atoms, and all atoms are made up of three main particles: protons, neutrons, and electrons. As summarized in Table 2.1, protons are positively charged, neutrons are uncharged and electrons are negatively charged. The negative charge of one electron balances the positive charge of one proton. Both protons and neutrons have a mass of 1, while electrons have almost no mass.

Table 2.1 Charges and masses of the particles within atoms

Elementary Particle Charge Mass

Proton +1 1

Neutron 0 1

Electron −1 ~0

The element hydrogen has the simplest atoms, each with just one proton and one electron. The proton forms the nucleus, while the electron orbits around it. All other elements have neutrons as well as protons in their nucleus, such as helium, which is depicted in Figure 2.2. The positively charged protons tend to repel each other, and the neutrons help to hold the nucleus together. The number of protons is the atomic number, and the number of protons plus neutrons is the atomic mass. For hydrogen, the atomic mass is 1 because there is one proton and no neutrons. For helium, it is 4: two protons and two neutrons.

For most of the 16 lightest elements (up to oxygen) the number of neutrons is equal to the number of protons. For most of the remaining elements, there are more neutrons than protons, because extra neutrons are needed to keep the nucleus together by overcoming the mutual repulsion of the increasing numbers of protons concentrated in a very small space. For example, silicon has 14 protons and 14 neutrons. Its atomic number is 14 and its atomic mass is 28. The most common isotope of uranium has 92 protons and 146 neutrons. Its atomic number is 92 and its atomic mass is 238 (92 + 146).

helium atom

Figure 2.2 A depiction of a helium atom.

The dot in the middle is the nucleus, and the surrounding cloud represents where the two electrons might be at any time. The darker the shade, the more likely that an electron will be there. An angstrom (Å) is 10-10m . A femtometre (fm) is 10-15m. In other words, a helium atom’s electron cloud is about 100,000 times bigger than its nucleus.

Electrons orbiting around the nucleus of an atom are arranged in shells — also known as “energy levels.” The first shell can hold only two electrons, while the next shell holds up to eight electrons. Subsequent shells can hold more electrons, but the outermost shell of any atom holds no more than eight electrons. The electrons in the outermost shell play an important role in bonding between atoms. Elements that have a full outer shell are inert in that they do not react with other elements to form compounds. They all appear in the far-right column of the periodic table: helium, neon, argon, etc. For elements that do not have a full outer shell, the outermost electrons can interact with the outermost electrons of nearby atoms to create chemical bonds. The electron shell configurations for 29 of the first 36 elements are listed in Table 2.2.

Answer:

which class are you please mention

Answer:

group 18 has 8 valence electrons, that's why they are stable.

8!

Explanation:

You're looking at the very last column, right? Noble gases are known for their stability because their valence shells are full! Lucky for you, all you have to do to know the number of valence electrons is look at the column number and take ignore the 1! 16 becomes 6, 18 becomes 8.

Answer:

no it will have no charge...it would be electrically neutral! because the number of protons and electrons are equal!

Answer:

During the eclipse season, the Moon is at a low ecliptic latitude (less than around 1.5° north or south), hence the Sun, Moon, and Earth become aligned straight enough (in syzygy) for an eclipse to occur.

Explanation:

The number of moles of gas produced from the reaction of 2.00g of potassium with an excess amount of water is 0.025 moles.

The reaction of potassium with an excess amount of water is:

2K + 2H\(_2\)O \(\rightarrow\) 2KOH + H\(_2\)

To calculate the moles of hydrogen gas first we need to calculate moles of potassium in 2.00g

No. of moles = (mass) / (molecular mass)

The mass given is 2.00 g and the Molecular mass is 39.09 units

∴ No. of moles = (2) / (39.09) = 0.05

From the above reaction, we get that 2 moles of potassium give 1 mole of hydrogen gas. Thus, 0.05 moles of potassium gives 0.025 moles of hydrogen gas.

Therefore, the no. of moles of hydrogen gas produced is 0.025 moles.

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The right response is B. 103.5 g. The mole ratio of sodium to chloride is 1:1 according to the equation Na+ + Cl NaCl. Since 4.5 moles of chloride are provided, the equation requires 4.5 moles of sodium to be balanced. We must utilise the molar mass of sodium, which is 22.99 g/mol, to get the mass of sodium.

We obtain 103.5 g of sodium by multiplying 4.5 moles of sodium by 22.99 g/mol. The correct response is B. 103.5 g.

The equation requires 1 mole of sodium for every mole of chloride, giving 4.5 moles of sodium and 103.5 g.

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From the information given:

∴

The volume of the sterling silver pendant is:

= 61.3 mL - 50.0 mL

= 11.3 mL

Since, 1 mL = 1cm³

Then;

11.3 mL = 11.3 cm³

Using the relation for Density; i.e.

\(\mathbf{Density = \dfrac{mass}{volume}}\)

\(\mathbf{10.25 \ g/cm^3= \dfrac{mass}{11.3 \ cm^3}}\)

mass = 10.25 g/cm³× 11.3 cm³

mass of the sterling silver = 115.825 grams

Recall that sterling silver has:

∴

The mass of the copper contained in the sterling silver pendant can be calculated as:

\(\mathbf{= \dfrac{115.825 \ g \times 7.5}{100}}\)

= 8.687 grams

Therefore, we can conclude that the mass of the copper contained in the sterling silver pendant is 8.687 grams

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(a) Because acid is caustic, dolphins can perish from exposure to it. Acids are compounds that give other things protons (H+). Acid can react with the proteins and lipids in dolphins' skin when they come into touch with it, leading to chemical burns and damage to the underlying tissue. Systemic consequences from this include death.

(b) Because chlorine is a potent oxidizer, it interacts with red-hot iron powder to produce Iron(III) chloride (FeCl3) rather than Iron(II) chloride (FeCl2). FeCl3 is created when chlorine at high temperatures rapidly accepts electrons from iron atoms. Contrarily, iron interacts with HCl, a less potent oxidizer than chlorine, to produce FeCl2.

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This is an ideal gas problem, so let's see the relationships of volume with pressure and temperature:

- The relationship between volume and pressure is inversely proportional.

- The relationship between volume and temperature is directly proportional.

When the gas's volume decreases, the temperature would decrease too but the pressure would increases, so the answer would be B. Its pressure increased.

The answer is:

C.(mitochondria)

I took the test, hope this helps!

The wavelength that is associated with the transition is  2145 nm.

We know that the wavelength can be obtained from the use of the Rydberg equation and we know that the Bohr's mode lets us know that an electron can move from from a higher to a lower energy level.

Let us write;

1/λ = RH(1/\(n_{2} ^2\) - 1/\(n_{1} ^2\))

λ = wavelength

RH = Rydberg constant

\(n_{1}\) = initial level

\(n_{2}\) = final level

Then;

1/λ = 1.097 * 10^7 (1/4^2 - 1/7^2)

1/λ = 1.097 * 10^7 ( 0.0625 - 0.020)

λ =  2145 nm

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hold the syringe downward,shake vigorously for sometime,and expel the bubbles through the needle using the syringe plunger. hold the syringe upright, provide a firm tap or flick to the barrel

There are numerous ways to determine whether lead is present in an ore. Atomic absorption spectroscopy is a popular approach. With this method, an ore sample is dissolved in acid and then atomized in a flame or plasma.

The sample's atoms will absorb light at particular wavelengths that are peculiar to the element under investigation. The amount of light absorbed can be used to calculate how much lead is present in the sample. Inductively coupled plasma mass spectrometry and X-ray fluorescence spectroscopy are further techniques. It is crucial to remember that these procedures call for specialized tools and training, thus they ought to only be carried out in a lab by qualified experts.

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Answer:

The answer to this question is given below in this explanation section.

Explanation:

                       "mutation can contribute to the development of many types of cancers"

About genetic mutations:

There are the two basic type of genetic mutations

Acquired mutations:

These are the most common cause of cancer.They occur from damage to genes in a particular cell during a personal life.For example this could be a breast cell or a colon cell,  with the goes on to divide many times and form a tumor.A tumor is an abnormal mass. Cancer that occurs because of acquired mutations are not found in every cell in the body and they are not passed from parent to child.

Factors that causes these mutations include:

Germ line mutations:  

These are less common.A germ line mutations occurs in a sperm cell or egg cell.It passes directly from a parent to a child at the time of conception.As they embryo grows into a baby,the mutation from the initial sperm or egg cell is copied into every cell within the body.Because the mutation effects reproductive cells,it can pass generation to generation.Cancer caused by germ line mutations is called inherited cancer. it accounts for about 5% to 20% of all cancers.

Mutations and cancer:

A mutation may be harmful beneficial or neutral.This depends where in the gene the change occurs.Typically the body corrects most mutations.A single mutations will likely not cause cancer.

Types of genes like a cancer:

Many of the genes that contribute to cancer development fall into board categories.

Tumors suppressor genes:

These are protective genes. Normally they limit cell growth by:

The term for producing a current by moving a wire through a magnetic field is electromagnetic induction.

When a conductor (such a wire) is moved through a magnetic field, a voltage is induced across the conductor, in accordance with Faraday's law of electromagnetic induction. The right answer is c.

Michael Faraday made the initial discovery of this phenomenon in the early 19th century. The strength of the magnetic field, the rate of movement, and the angle between the conductor and the magnetic field all affect how much voltage is induced.

Electric generators, which transform mechanical energy into electrical energy, work on the fundamental principle of electromagnetic induction. It serves as the foundation for numerous contemporary technologies, such as wireless charging, motors, and transformers.

In conclusion, electromagnetic induction is a key idea in physics and electrical engineering that outlines the procedure of generating a current by moving a conductor through a magnetic field.  The correct option is c.

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The compound which represents the molecular formula with a scale factor of 2 is \(C_6H_8O_6\) . The correct answer is option A

The empirical formula of a compound gives the simplest whole-number ratio of the atoms present in the compound. To obtain the molecular formula, we need to know the actual number of atoms in the molecule.

To find the molecular formula with a scale factor of 2, we need to multiply the subscripts in the empirical formula by 2.

Therefore, the molecular formula with a scale factor of 2 would be:

\(C_3H_4O_3\) × \(2\)  = \(C_6H_8O_6\)

So option A is the correct answer.

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Answer:

Paper is Not Reuseable like plastic.

Explanation:

At equilibrium, the number of moles of \(Cl_2\) (g) will be 0.2025 mol.

1: Write the balanced chemical equation:

\(C_O\)(g) + \(Cl_2\)(g) ⟶ \(C_OCl_2\)(g)

2: Set up an ICE table to track the changes in moles of the substances involved in the reaction.

Initial:

\(C_O\)(g) = 0.3500 mol

\(Cl_2\)(g) = 0.05500 mol

\(C_OCl_2\)(g) = 0 mol

Change:

\(C_O\)(g) = -x

\(Cl_2\)(g) = -x

\(C_OCl_2\)(g) = +x

Equilibrium:

\(C_O\)(g) = 0.3500 - x mol

\(Cl_2\)(g) = 0.05500 - x mol

\(C_OCl_2\)(g) = x mol

3: Write the expression for the equilibrium constant (Kc) using the concentrations of the species involved:

Kc = [\(C_OCl_2\)(g)] / [\(C_O\)(g)] * [\(Cl_2\)(g)]

4: Substitute the given equilibrium constant (Kc) value into the expression:

1.2 x \(10^3\) = x / (0.3500 - x) * (0.05500 - x)

5: Solve the equation for x. Rearrange the equation to obtain a quadratic equation:

1.2 x \(10^3\) * (0.3500 - x) * (0.05500 - x) = x

6: Simplify and solve the quadratic equation. This can be done by multiplying out the terms, rearranging the equation to standard quadratic form, and then using the quadratic formula.

7: After solving the quadratic equation, you will find two possible values for x. However, since the number of moles cannot be negative, we discard the negative solution.

8: The positive value of x represents the number of moles of \(Cl_2\)(g) at equilibrium. Substitute the value of x into the expression for \(Cl_2\)(g):

\(Cl_2\)(g) = 0.05500 - x

9: Calculate the value of \(Cl_2\)(g) at equilibrium:

\(Cl_2\)(g) = 0.05500 - x

\(Cl_2\)(g) = 0.05500 - (positive value of x)

10: Calculate the final value of \(Cl_2\) (g) at equilibrium to get the answer.

Therefore, at equilibrium, the number of moles of \(Cl_2\) (g) will be 0.2025 mol.

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Sound waves are mechanical waves that travel through a medium such as air, water, or solids. They are characterized by their frequency, wavelength, and amplitude. The correct answer is 4.

Frequency refers to the number of cycles of the wave that occur per unit of time and is measured in hertz (Hz). Wavelength is the distance between two adjacent points of a wave with the same phase. Amplitude is the maximum displacement of the particles in the medium from their rest position as the wave passes through it. Density, on the other hand, is a property of matter and not a characteristic of a sound wave. It refers to the mass per unit volume of a substance. Correct answer: 4.

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--The complete Question is, Which of these is not a property of a sound wave:

1. frequency,

2. wavelength,

3. amplitude,

4. density --

Answer:

C3H6O

Explanation:

Step 1:

Data obtained from the question include the following:

Mass of the compound = 0.225g

Mass of CO2 = 0.512g

Mass of H2O = 0.209g

Step 2:

Determination of the masses of carbon, hydrogen and oxygen present in the compound.

This is illustrated below:

For Carbon, C:

Molar mass of CO2 = 12 + (2x16) = 44g/mol

Mass of C in CO2 = 12/44 x 0.512 = 0.1396g

For Hydrogen, H:

Molar mass of H2O = (2x1) + 16 = 18g/mol

Mass of H in H2O = 2/18 x 0.209 = 0.0232g

For Oxygen, O:

Mass of O = 0.225 – (0.1396 + 0.0232)

Mass of O = 0.0622g

Step 3:

Determination of the empirical formula for caprioc acid.

This can be obtain as follow:

C = 0.1396g

H = 0.0232g

O = 0.0622g

Divide by their molar mass

C = 0.1396/12 = 0.0116

H = 0.0232/1 = 0.0232

O = 0.0622/16 = 0.0039

Divide by the smallest

C = 0.0116/0.0039 = 3

H = 0.0232/0.0039 = 6

O = 0.0039/0.0039 = 1

Therefore, the empirical formula for caprioc acid is C3H6O

Explanation:

Density = mass/volume

= 458/(12×8.5×0.5)

= 458/51

= 8.98 g/cm³

Answer:

magnitude and direction

Answer: Quantitative data

Explanation:

The final temperature of the water is: T_final = 45.0°C

We can use the formula for the specific heat capacity of the water to solve this problem:

q = mcΔT

First, we can calculate the initial energy of the water:

q = mcΔT

q = (10.0 g) (4.184 J/g°C) (25.0°C)

q = 1,046 J

Next, we can calculate the final temperature after absorbing 840 J:

q = mcΔT

840 J = (10.0 g) (4.184 J/g°C) (ΔT)

ΔT = 20.0°C

Therefore, the final temperature of the water is:

T_final = T_initial + ΔT

T_final = 25.0°C + 20.0°C

T_final = 45.0°C

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