186000 written in scientific notation

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The volume of the metal sample is 6.2 ml

The theory behind this is that the volume of the metal is what causes the increase in water volume in the cylinder.

This means that by comparing the volume occupied by the water and metal together and the amount occupied by the water alone in the cylinder, you can determine the volume of the metal.

To be more specific, the volume of the metal will be,

Vmetal= Vwater + metal - Vwater

In this case, we have

Vwater = 23.6 ml

Vwater + metal = 29.8 ml

So,

Vmetal = 29.8 ml - 23.6 ml = 6.2 ml

Thus the volume of the metal sample is 6.2 ml.

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According to the electronic configuration, properties which are most common in non-metals are high ionization energies, high electronegativity and poor conductors of heat and electricity.

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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Whenever a substance changes from one phase to another (solid to liquid or liquid to gas), energy must be added or removed. This is because the energy of the molecules within the substance changes as the substance changes phases.

Whenever a substance changes from one phase to another (solid to liquid or liquid to gas), energy must be added or removed. This is because the energy of the molecules within the substance changes as the substance changes phases. This energy change is directly related to the attractive forces between molecules in the substance.In order to change phases, the attractive forces between molecules must be stronger than the kinetic energy of the molecules. Kinetic energy is a type of energy that is associated with motion. The higher the temperature of a substance, the more kinetic energy the molecules have. When a substance is heated, the kinetic energy of the molecules increases, and they move faster. When the kinetic energy of the molecules is high enough, the attractive forces between them are not strong enough to hold them together in a solid or liquid.

At this point, the substance changes phase and becomes a gas. To change from a gas to a liquid or solid, the opposite must occur. The attractive forces between molecules must be stronger than the kinetic energy of the molecules. This can be achieved by removing energy from the substance. When energy is removed, the kinetic energy of the molecules decreases, and they move slower. As the kinetic energy of the molecules decreases, the attractive forces between them become stronger, and they can be held together in a liquid or solid. In conclusion, in order for a substance to change phase, enough energy needs to be added or removed so that the attraction between molecules can overcome the kinetic energy of molecules.

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Answer:

Nicotine is classified as a stimulant drug.

Answer:

136 neutrons

Explanation:

To find the number of neutrons of an atom, you subtract the atomic number (number of protons) from the atomic mass.

223 - 87 = 136

Explanation:

used as rust remover or paint remover

It is stable to most peptide synthesis conditions, such as acidic or basic conditions, allowing for the synthesis of long peptide chains without unwanted side reactions.

Dansylalanine is synthesized by reacting N-dansyl chloride with the amine group of Boc-L-alanine.

The Boc group on compound 1 in the synthesis of Dansylalanine most likely functions to protect the α-amine group of L-alanine from N-dansylation.

The α-amine group of L-alanine is a nucleophilic center that is highly reactive.

It readily reacts with electrophiles such as the N-dansyl group in N-dansyl chloride, which could have led to the formation of unwanted products if left unprotected.

The presence of the Boc group in Boc-L-alanine shields the α-amine group, making it less reactive towards electrophiles.

Therefore, when N-dansyl chloride is added to Boc-L-alanine, it reacts selectively with the carboxylate group, forming a stable amide bond with the α-amine group protected.

Once the reaction is complete, the Boc group can be removed by treating the product with an acid, unmasking the α-amine group and revealing the desired dansylalanine.

The use of the Boc group as a protecting group in peptide synthesis has become prevalent because of its stability and ease of removal.

It is stable to most peptide synthesis conditions, such as acidic or basic conditions, allowing for the synthesis of long peptide chains without unwanted side reactions.

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Answer: a

Explanation:

The correct option is A.

n-Propylbenzene is used to prepare benzoic acid. It is employed as a solvent for gas chromatography. It is also used as a solvent and an intermediate in organic synthesis.

n-Propylbenzene is formed inside H-ZSM-11 channels by intermolecular SN2 trans-alkylation between cumene and benzene.

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The shelf-life of the reconstituted ampicillin suspension remains unchanged at 16 days when stored at room temperature (25°C) compared to storing it in the refrigerator at 5°C.

To calculate the shelf-life of the reconstituted ampicillin suspension at room temperature, we'll assume that the degradation follows an Arrhenius relationship.

Shelf-life at 5°C (T₁) = 16 days

Temperature at 5°C (T₁) = 5°C

Temperature at room temperature (T₂) = 25°C

To find the shelf-life at room temperature, we can use the Arrhenius equation:

k₁ / k₂ = exp((Ea / R) * (1/T₂ - 1/T₁))

Since we don't have specific values for Ea and the reaction rate constants, we'll assume that they are the same for simplicity. Thus, we can write:

k₁ / k₂ = exp((Ea / R) * (1/25 - 1/5))

Simplifying the equation, we get:

exp((Ea / R) * (4/125)) = 1

To satisfy this equation, the exponential term must be zero, which implies:

(Ea / R) * (4/125) = 0

Solving for Ea, we find:

Ea = 0

Since Ea is zero, it means the reaction rate constants and degradation rates are the same at both temperatures. Therefore, the shelf-life at room temperature (25°C) is the same as the shelf-life at 5°C, which is 16 days.

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A significant component of the Romantic movement, transcendentalism existed from around 1830 to 1860. Its presumed leader was Ralph Waldo Emerson.

A philosophical movement known as transcendentalism emerged in New England in the latter half of the 1820s and early 1830s. While society and its institutions have tainted the purity of the individual, a key notion is that people are at their best when they are really "self-reliant" and autonomous. Transcendentalists rejected the idea of distant heaven in favor of the idea that heavenly experience is inherent in the ordinary. Transcendentalists considered both physical and spiritual events to be parts of dynamic processes rather than distinct entities.

Transcendentalism was one of the first philosophical currents to arise in the United States, making it a crucial early development in the development of American philosophy. Its supporters claim that people are capable of producing fully original work by emphasizing subjective intuition above empirical empiricism.

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Answer:

About 7.109g

Explanation:

25000mL is the same as 25 liters.

\(PV=nRT \\\\0.5 (25)=n (0.0821) (300) \\\\n\approx 0.508\)

Multiplying this by the molar mass of nitrogen, you get about 7.109 grams of nitrogen. Hope this helps!

Answer:

A brick held at a vertical position above the ground or zero height position). A moving car possesses mechanical energy due to its motion (kinetic energy).

Explanation:

The pH of a 0.10m solution of hb will be 1.80.

To solve this problem, we need to use the acid dissociation constant (Ka) of HB, which is the conjugate acid of the base B-. We can calculate Ka using the given pKa value, which is the negative logarithm of Ka.

pKa = -log(Ka)

10^-pKa = Ka

Let's assume that the reaction for the dissociation of HB is:

HB + H2O ⇌ B- + H3O+

The Ka expression for this reaction is:

Ka = [B-][H3O+] / [HB]

We can rearrange this expression to solve for [H3O+]:

[H3O+] = Ka * [HB] / [B-]

We know that [B-] = [OH-] = 10^-(pH) = 10^-9 (since the pH of the 0.050 M NaB solution is 9.00). We also know that [HB] = 0.010 M (since the concentration of the 0.010 M HB solution is given).

Finally, we need to calculate Ka using the given pKa value.

pKa = 4.76

Ka = 10^-pKa = 1.58 x 10^-5

Plugging in the values, we get:

[H3O+] = (1.58 x 10^-5) * (0.010 M) / (10^-9)

           = 0.0158 M

Therefore, the pH of the 0.010 M solution of HB is:

pH = -log[H3O+] = -log(0.0158)

     = 1.80

Hence, pH of solution is 1.80

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Answer:

36V

Explanation:

Given parameters:

Number of turns in primary coil  = 150turns

Secondary coil turn = 50turns.

Input voltage  = 12V

Unknown:

Output voltage  = ?

Solution:

For this transformer problem, we use the expression;

   \(\frac{N_{s} }{N_{p} }\)   = \(\frac{V_{s} }{V_{p} }\)  

Insert the parameters and solve;

        Ns is the number of secondary turns

        Np is the number of primary turns

         Vs is the secondary voltage

          Vp is the secondary voltage

Insert the parameters and solve;

          \(\frac{150}{50}\)   = Output voltage / 12

          Output voltage = 12 x 3  = 36V

In order to determine the chemical formula of a bromide compound based on its percent composition, we require the specific value for the percent by mass of the metal. Without this information, it is impossible to ascertain the chemical formula.

The percent composition represents the proportion of each element in the compound by mass.

For example, if the metal in question is sodium (Na), and the given percent by mass is 58.5%, it indicates that sodium comprises 58.5% of the compound's total mass.

With this information, we can deduce the chemical formula, which, in this case, would be NaBr for sodium bromide.

However, without the precise percentage, we cannot determine the chemical formula accurately.

Hence, without certain information, it is not possible to ascertain the chemical formula.

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The concentration of A after 35 seconds is approximately 2.701875 M.

In a zeroth order reaction, the rate of reaction is independent of the concentration of the reactant. The rate equation for a zeroth order reaction is given by:

Rate = k

Where k is the rate constant.

To determine the concentration of A after 35 seconds, we can use the integrated rate law for a zeroth order reaction:

[A]t = [A]0 - kt

Where [A]t is the concentration of A at time t, [A]0 is the initial concentration of A, k is the rate constant, and t is the time.

Given:

[A]0 = 3.0 M (initial concentration of A)

k = 0.00855 s^(-1) (rate constant)

t = 35 seconds (time)

Plugging the values into the equation, we get:

[A]35 = 3.0 M - (0.00855 s^(-1)) * (35 s)

[A]35 = 3.0 M - 0.298125 M

[A]35 = 2.701875 M

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Answer:

Atoms are made of three types of sub atomic particles, they are the electrons, neutrons and protons.  Electrons are negatively charged and they are orbiting around the nucleus in energy shells. Protons are positively charged , neutrons are neutral and have no charge, both neutrons and protons are located in the nucleus. In atoms the atomic number is the number of protons the atom consists of and mass number is the sum of protons and neutrons in the nucleus. In a neutral atom, the number of electrons and protons are equal, this means that the number of negative charges and positive charges are equal. lets take Cl as an example. Its atomic number is 17. number of protons and charge - +17 number of electrons with charge - -17 overall chage sum of the charges = + 17 -17 = 0 therefore no charge, hence its neutral. isotopes are the same element having the same atomic number but different mass numbers. ³⁵Cl -protons - 17 electrons - 17 neutrons 18 neutrons  

Explanation:

The following H atom transitions, that would emit the photon of the light with the greatest energy is n = 2 to n = 1. The correct option is c.

The largest energy is given as :

ΔE = 13.6 ( 1/nf² - 1/ ni²)

a) n = 5 to n = 3

ΔE = 13.6 ( 1/3² - 1/ 5²)

ΔE = 0.97 eV

b) n = 4 to n = 2

ΔE = 13.6 ( 1/2² - 1/ 4²)

ΔE = 2.4 eV

c) n = 2 to n = 1

ΔE = 13.6 ( 1/1² - 1/ 2²)

ΔE = 10.2 eV

d) n = 5 to n = 4

ΔE = 13.6 ( 1/4² - 1/ 5²)

ΔE = 0.7 eV

Thus, the transition would emit the photon of light with the greatest energy is n= 2 to n= 1. The correct option is c.

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Answer:

Basically it measures the acidity or alkalinity of a substance.

Answer:

No

Explanation:

Ionic bonding is where an one atom wants to gain e- while the other wants to lose e-

Such as NaCl.

The name of the alkane structure with three carbon atoms and hydrogen atoms can be either propane or cyclopropane,

The alkane structure with three carbon atoms and hydrogen atoms can be represented by two different models.

Model 1: Propane

In this model, there are three carbon atoms connected by single bonds, with each carbon atom having three hydrogen atoms bonded to it. This structure is known as propane, which is a three-carbon alkane.

Model 2: Cyclopropane

In this model, the three carbon atoms form a cyclical structure, with each carbon atom bonded to two hydrogen atoms. This structure is known as cyclopropane, which is a three-carbon cyclic alkane.

So, the name of the alkane structure with three carbon atoms and hydrogen atoms can be either propane or cyclopropane, depending on whether the carbon atoms are arranged in a straight chain or a cyclic form, respectively.

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The boiling point of water is raised by 1.88K when a 2 molal solution of sodium chloride is added to water.estimate the boiling point of a 2m solution of nacl in water.

Pour 11.69 g of NaCl into a suitable beaker (100 mL beaker in this case). Increase the amount to 100 mL by adding deionized water. Add a stir bar to the beaker and leave it on a stir plate for 1 minute, or until thoroughly dissolved. If desired, sterile-filter and transfer to an adequately labeled container. When a 2 molal solution of sodium chloride is added to water, the boiling point rises by 1.88K. Fill an appropriate beaker with 11.69 g of NaCl (100 mL beaker in this case). Add deionized water to bring the total to 100 mL. Place the beaker on a stir plate and leave it for 1 minute, or until totally dissolved. If desired, sterile-filter the solution and transfer it to a properly labeled container.

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A polar covalent bond can best be described as a bond where electrons are unequally shared, resulting in more electrons orbiting certain atoms than others.

A covalent bond is a type of chemical bond that is formed when two non-metal atoms share their valence electrons. When the shared electrons are not shared equally, a polar covalent bond is formed.

In a polar covalent bond, electrons are drawn closer to the more electronegative atom, causing partial negative charges to arise on the more electronegative atom and partial positive charges to arise on the less electronegative atom.

Hence, a polar covalent bond can best be described as a bond where electrons are unequally shared, resulting in more electrons orbiting certain atoms than others.

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A polar covalent bond is a type of covalent bond where electrons are unequally shared due to differences in electronegativity. It leads to a slight charge difference, forming polar molecules with regions of different charges, like in water molecules.

A polar covalent bond is a type of chemical bond, particularly a type of covalent bond, where electrons are unequally distributed between the atoms involved. This unequal distribution of electrons, caused by differences in electronegativity, leads to a slight charge difference. Consequently, partially positive atoms within one molecule attract the partially negative atoms of other molecules, hence forming polar molecules with regions of different charges.

For example, the bond between hydrogen and oxygen atoms in a water molecule is a polar covalent bond. In this case, the shared electrons spend more time near the oxygen nucleus due to its higher electronegativity. As a result, the oxygen atom has a partial negative charge (δ-), whereas the hydrogen atoms have a partial positive charge (δ+).

The type of bond - whether nonpolar or polar covalent - is determined by a property of the atoms named electronegativity, a measure of an atom's ability to attract electrons toward itself. The larger the difference in electronegativity, the more polarized the electron distribution, meaning a larger partial charge on the atoms.

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The smallest number of distillations you need to perform to achieve at least 90% compound a in your distillate is 3.

Draw a perpendicular line from 60% mol B on x axis. Note the factor in which this line intersects the decrease curve. Now from this draw line parallel to x axis and observe factor in which this line intersects the higher curve. Now from this factor draw a line parallel to y axis and observe the factor in which this line intersects the decrease curve. Now repeat the system till you attain 10 mol% B this is not anything however ninety mol% A.

The  smallest number of distillations you need to perform to achieve at least 90% compound a in your distillate is 3.

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The wide diversity of minerals can be attributed to several factors, including the elements that make up minerals and the Earth processes involved in their formation.

1. Elemental Composition: Minerals are formed from various combinations of elements. The Earth's crust contains a wide range of elements, each with its unique properties. The different combinations and proportions of these elements give rise to a vast array of minerals with distinct chemical compositions.

2. Geological Processes: Minerals are formed through a variety of geological processes. These processes include crystallization from magma or lava, precipitation from aqueous solutions, and metamorphism (changes in mineral structure due to heat and pressure). Each process creates specific conditions that influence the formation and composition of minerals.

3. Environmental Factors: Factors such as temperature, pressure, and the presence of other minerals or elements in the surroundings can also influence mineral formation. Varied environmental conditions give rise to different minerals, leading to the rich diversity observed in nature.

Overall, the wide diversity of minerals results from the interplay of elemental composition, geological processes, and environmental factors, all working together to create a multitude of unique mineral species found throughout the Earth's crust.

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The fat left the body of your friend as CO2 and H2O when they lost about 7 kg (about 15 pounds) of fat on a regimen of strict diet and exercise (option C).

When a person loses weight, the majority of the lost mass is breathed out as CO2, and the rest is excreted as water. The only macronutrient that can leave the body through the lungs is fat, which is oxidized in the Krebs cycle to form carbon dioxide (CO2) and water (H2O).

When we breathe, the lungs act as an excretory organ, expelling the weight as carbon dioxide. As a result, the carbon atom in the CO2 molecules is removed from the body via respiration, and the oxygen atoms are reduced to form water molecules (H2O).

The human body will not break down amino acids or convert fat to ATP (which weighs less than fat). The human body converts protein to amino acids, which are then used to create new proteins or other essential molecules. The breakdown of glucose or fat provides ATP, which is the body's main energy source.

Thus, when the body burns fat it is released as CO2 and H2O.

Therefore, the fat left the body of your friend as CO2 and H2O when they lost about 7 kg (about 15 pounds) of fat on a regimen of strict diet and exercise (option C).

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Answer:

# protones: 22

# neutrones: 26

# electrones: 22

Explanation:

El número atómico del titanio es 22. Este número atómico representa la cantidad de protones del átomo en cuestión. Así:

# protones: 22.

El número másico se define como la suma de protones y neutrones, así:

48 = 22 + # neutrones

26 = # neutrones

Un átomo es neutro, esto quiere decir que sus cargas positivas y negativas son iguales (Protones: cargas positivas; Electrones: Cargas negativas).

Así, el # protones = # electrones = 22