Salinity can be calculated from all of the ions found in the water. The most commonly used is chlorine. If the chlorinity of a sample is determined to be 1.92%, what is the salinity

Answer: c

Explanation:

An unexpected color change is not a sign that a chemical change has occur. Thus option c is correct.

A chemical change is defined as the transformation of one material into another, the formation of new materials with different properties, and the formation of one or more new substances.

There are basically five types of chemical reaction.

Thus, an unexpected color change is not a sign that a chemical change has occur. Thus option c is correct.

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The following opttions correctly describe the general mechanmism for electrophilic aromatic substition is A. an electrophile attacking the aromatic ring and forming a resonance-stabilized intermediate.

This intermediate then undergoes deprotonation to reform the aromatic ring. The electrophile is typically a positively charged species or a species that can be easily protonated to form a positively charged intermediate. The mechanism is classified as electrophilic because the electrophile is attracted to the electron-rich pi electrons of the aromatic ring. The first step of the mechanism involves the generation of the electrophile, which can be done through various methods such as nitration, halogenation, sulfonation, and Friedel-Crafts alkylation or acylation.

The electrophile then attacks the ring, forming a carbocation intermediate that is stabilized through resonance. The intermediate is then deprotonated by a base to reform the aromatic ring. The final product will have the electrophile attached to the ring in place of a hydrogen atom. Overall, the general mechanism for electrophilic aromatic substitution involves the generation of an electrophile, its attack on the aromatic ring, and the subsequent deprotonation to reform the aromatic ring. So therefore the correct answer is A. an electrophile attacking the aromatic ring and forming a resonance-stabilized intermediate.

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Instead of being viewed as a mystery, closed-off topic that only professionals can understand, Savage believes that science should be transparent and open to all.

Science is an organised, empirical method of learning about and comprehending the natural world. Through experiments and observations, theories are observed, tested, and validated. Science spans a wide range of disciplines, including physics, chemistry, biology, and psychology, and it has contributed significantly to many of the technological and medical advances we see today. Science is a continual process that enhances our quality of life and helps us learn more about the planet. The ongoing review and advancement of scientific hypotheses are made possible by their foundation in the concepts of scepticism and critical thinking. Additionally, science is essential in solving issues like resource depletion, disease outbreaks.

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Answer:

Strong base

Explanation:

Answer: weak base

Explanation:

Answer:

Combination reaction.

Explanation:

The reaction depicted in the question is;

H2 (g) + Cl2 (g) ⟶ 2HCl (l)

Now, this reaction shows that two reactants namely hydrogen and chlorine react to form a single product named Hydrogen chloride. This process is called combination reaction.

Answer:

True. The limiting reagent is the reactant that is completely consumed in a chemical reaction and limits the amount of product that can be formed. The theoretical yield is the maximum amount of product that can be obtained from the limiting reagent, assuming that the reaction goes to completion and no side reactions occur. However, in practice, it is common for side reactions to occur, which can reduce the actual yield of the product. Therefore, while the limiting reagent does control the theoretical yield of a reaction, the actual yield may vary due to the presence of side reactions or other factors that can affect the efficiency of the reaction.

Explanation:

Answer:

D

Explanation:

not all atoms would be the same size. As for they vary scaleing from left to right in the periodic table.

what are the following things

Metals are good conductors and shows some peculiarities such as luster, ductility, malleability,etc. Brittleness is not associated with metals since they are hard. Hence option A is correct.

Metals are electropositive elements with good conductivity. Metals are classified into the s block and d block of periodic table. Thus alkali metals, alkaline earth metals and transition metals are the classes of metals.

Metals are rich in free electrons thereby, they capable of conducting electrically and thermally. Other features that metals have , they are hard and not brittle. Metals are malleable and ductile.

Malleability is the property by which it can be pressed into different shapes easily without cracking. Ductility means they can be plastically deformed into thin wires without fracture.

Metals are shining and this property is called lustrous. Hence all the properties such malleability, ductility and luster are features of metals but they are not brittle. Hence option A is correct.

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Your question is incomplete. But your complete question probably was:

Which of the following is NOT a property of metals associated with metallic bonds?

A Brittleness

B Malleability

C Ductility

D Luster

Answer:

protein sysnthesis

Explanation:

If a scientist identifies two different structures that both specify the same amino acid, the scientist would likely describe these structures as "isomers."

Isomers are molecules that have the same chemical formula but differ in their arrangement of atoms. In this case, the two structures would have the same number and types of atoms, but the way the atoms are arranged would be different. This could lead to differences in the properties and reactivity of the structures. The scientist may also describe these structures as "stereoisomers" if they differ in their three-dimensional arrangement of atoms around a central carbon atom.

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n Li = m Li / Mr Li

n Li = 20 / 7

n Li = 2.86 mol

n H2SO4 = m H2SO4 / Mr H2SO4

n H2SO4 = 98 / 98

n H2SO4 = 1 mol

H2SO4 is the limiting reactant

n H2 = (coef. H2 / coef. H2SO4) • n H2SO4

n H2 = (1/1) • 1

n H2 = 1 mol

m H2 = n H2 • Mr H2

m H2 = 1 • 2

m H2 = 2 gr

Answer:oml felt

Explanation:

I'm sorry tho

Answer:

800-273-8255

Explanation:

here is the sui cide hotline number

The selenate ion, SeO32-, is classified as a polyatomic anion.

A polyatomic ion is a charged species composed of two or more atoms bound together by covalent bonds but carrying an overall charge. In the case of the selenate ion, it consists of one selenium atom (Se) and three oxygen atoms (O), forming a covalent bond. The negative charge on the ion (-2) indicates that it has gained two electrons, giving it a net charge.

To determine the classification of the selenate ion, we can break down the options provided:

a. polyatomic cation: A cation is a positively charged ion. However, the selenate ion has a negative charge, so it does not fall under this category.

b. monoatomic cation: A monoatomic cation is a positively charged ion consisting of a single atom. The selenate ion contains multiple atoms, so it is not a monoatomic cation.

c. polyatomic anion: A polyatomic anion is a negatively charged ion composed of multiple atoms. The selenate ion fits this definition precisely, as it consists of multiple atoms (selenium and oxygen) and carries a negative charge.

d. monoatomic anion: A monoatomic anion is a negatively charged ion that consists of a single atom. However, the selenate ion contains multiple atoms (Se and O), so it does not qualify as a monoatomic anion.

e. none of the above: Based on the explanation above, option (c) - polyatomic anion is the correct classification for the selenate ion.

In summary, the selenate ion, SeO32-, is classified as a polyatomic anion. It consists of multiple atoms (one selenium atom and three oxygen atoms) that are covalently bonded and carry a net negative charge of -2.

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Answer:

The distance covered when speedwalking for 10 minutes based on the 8 meters trial (assuming a speed of 1 m/s) is 600 meters.

Explanation:

The speed of a body is the distance it covers per unit time when it travels. Its formula is given as; speed = distance/time. Its unit is meters per second as distance is measured in meters while time is measured in seconds.

From this formula, the distance covered by a body travelling with a given speed over a specific time can be determined. Distance = speed × time. This formula applies generally in all cases given the speed of the body and the time it travels.

Speed walking means walking as fast as possible without jogging or running. In this experiment, the speed over the 8 meters trial is not given. However, some assumptions can be made.

Assuming the speed while speedwalking is 1 meters per second; time taken = 10 mins or 10 × 60 seconds = 600 seconds. Distance covered = 1 m/s × 600 s = 600 m

Therefore, the distance covered when speedwalking for 10 minutes based on the 8 meters trial (assuming a speed of 1 m/s) is 600 meters.

Answer:

the answer is A. Magma is molten rock within the earth; Lava is molten rock on the earth's surface

Answer:

A Magma is molten rock within the earth

Explanaton:

The reaction between Aqueous sodium phosphate and aqueous magnesium chloride is a D. Double displacement reaction.

In this type of reaction, the cations and anions of two different compounds switch places to form two new compounds. In this case, the aqueous sodium phosphate (Na3PO4) contains the cation Na+ and the anion PO43-, while the aqueous magnesium chloride (MgCl2) contains the cation Mg2+ and the anion Cl-.

When these two compounds are mixed, the cations and anions switch places to form solid magnesium phosphate (Mg3(PO4)2) and aqueous sodium chloride (NaCl).

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The full question is:

Aqueous sodium phosphate and aqueous magnesium chloride are mixed together in a beaker and react to produce solid magnesium phosphate and aqueous sodium chloride.

What kind of reaction is this?

Decomposition reaction

Single displacement

Combustion reaction

Double displacement reaction

Anti-glycolytic training avoids metabolic fatigue to ensure the primary source of energy is: fat. Anti-glycolytic training typically involves longer, low-intensity exercises that rely on aerobic metabolism.

The primary source of energy in anti-glycolytic training is fat. This type of training aims to minimize the production of lactic acid, which is a byproduct of the breakdown of glucose. By doing so, it helps to improve fat oxidation and enhance endurance performance. Anti-glycolytic training typically involves longer, low-intensity exercises that rely on aerobic metabolism.

This approach allows the body to use fat as the primary fuel source, sparing glycogen and reducing metabolic fatigue. Overall, the goal of anti-glycolytic training is to enhance the body's ability to utilize fat for energy and improve endurance capacity.

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Answer:

The element is Sulfur.

Explanation:

He is not falling nor about to fall which means he’s perfectly balanced. So this means the force in the photo and friction in this photo is in a balanced condition, balancing the boy.

In the given picture, the applied force and the force of friction are balanced. if two forces act in the direction to make the object in a balanced state.

If the forces are in a balanced state it does not change the motion of the object, and if it is in an unbalanced state, it causes to change in the state of the motion.

Therefore, the force of friction and the gravitational force are balanced is the correct option.

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The given question is incomplete, so the complete question image is attached in the image below.

Answer:

KCrO₃

Explanation:

26.6% K, 35.3% Cr and 33.0% O

The steps in obtaining the empirical formulae from percentage composition is given as;

Step 1:

Divide the percentage composition by the atomic mass of the elements

K = 26.6 / 39.0983  = 0.6803

Cr = 35.3 / 51.9961 = 0.6789

O = 33.0 / 16  = 2.0625

Step 2:

Divide all though by the smallest number (0.6789)

K = 0.6803 / 0.6789 = 1.002

Cr = 0.6789 / 0.6789 = 1

O = 2.0625 / 0.6789 = 3.038

The Empirical formular is the ratio between the elements. This given as;

KCrO₃

The compound is a substituted cyclohexane with halogens at positions 1 and 2 of the ring. It can exist as several stereoisomers, depending on the arrangement of the substituents around the ring. There are eight possible stereoisomers of 1-bromo-2-chlorocyclohexane, which are four pairs of enantiomers with different configurations of substituents on the ring.

There are four possible stereoisomers, which are cis-1-bromo-2-chlorocyclohexane, trans-1-bromo-2-chlorocyclohexane, cis-1-chloro-2-bromocyclohexane, and trans-1-chloro-2-bromocyclohexane. Cis-1-bromo-2-chlorocyclohexane has the bromine and chlorine substituents on the same side of the ring. Trans-1-bromo-2-chlorocyclohexane has the bromine and chlorine substituents on opposite sides of the ring. Cis-1-chloro-2-bromocyclohexane has the chlorine and bromine substituents on the same side of the ring, but at positions 1 and 2, respectively. Trans-1-chloro-2-bromocyclohexane has the chlorine and bromine substituents on opposite sides of the ring, but at positions 1 and 2, respectively. Each of these stereoisomers can exist as a pair of enantiomers, which are mirror images of each other. Therefore, there are eight possible stereoisomers of 1-bromo-2-chlorocyclohexane, which are four pairs of enantiomers with different configurations of substituents on the ring.

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Answer:

9.03 x 10²³atoms

Explanation:

Given parameters:

Number of moles of CO₂  = 1.5mol

Unknown:

Number of atoms  = ?

Solution:

In a mole of a substance, we have the Avogadro's number of particles which is 6.02 x 10²³atoms.

  Using this number, we can determine the amount of atoms in any substance.

If;

       1 mole of CO₂ contains 6.02 x 10²³ atoms;

     1.5mole of CO₂ will contain 1.5 x 6.02 x 10²³ atoms

                                                = 9.03 x 10²³atoms

How many moles of tungsten atoms are in 4.8 * 10^25 atoms of tungsten?

Avogadro's number is the number of particles that we have in one mol of particles. It is 6.022 *10^23. For example: in 1 mol of atoms there are 6.022*10^23 atoms.

It's like a dozen. When we say a dozen atoms, we mean 12 atoms. So, when we say a mol of tungsten atoms, we mean 6.022 *10^23 atoms of tungsten.

1 mol of atoms of tungsten = 6.022 *10^23 atoms of tungsten

We will use that relationship to find the number of moles of tungsten atoms that we have in 4.8 *10^25 atoms of tungsten.

number of moles of tungsten atoms = 4.8 *10^25 atoms * 1 mol of atoms/(6.022 *10^23 atoms)

number of moles of tungsten atoms = 79.7 moles = 8 *10^1 moles

number of moles of tunsten atoms = 8.10^1 moles

Answer: b) 8*10¹ moles

It is impossible to reach absolute zero because the magnitude of work that is required to remove energy from a gas in order to attain the absolute zero is so high.

The absolute zero is the temperature at which the movement of all the gas molecules is theoretically believed to cease. At the absolute zero, gas molecules remain at fixed positions because according to the third law of thermodynamics, the entropy of a perfectly ordered system is zero.

It is impossible to reach absolute zero because the magnitude of work that is required to remove energy from a gas in order to attain the absolute zero is so high such that it is impractical to attain the absolute zero.

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The element first discovered in the Sun's spectrum and then found on Earth 30 years later is helium. In 1868, French astronomer Pierre Janssen and English astronomer Sir Norman Lockyer observed a yellow spectral line in the Sun's light during a solar eclipse.

This line did not correspond to any known element at that time. Lockyer and British chemist Edward Frankland suggested that the line was due to a new element, which they named "helium," after the Greek word for the Sun, "Helios." It was not until 1895, nearly 30 years after its initial discovery in the Sun's spectrum, that helium was found on Earth.

Scottish chemist Sir William Ramsay isolated helium by treating the mineral cleveite with acid. Ramsay's discovery confirmed the existence of helium as an element both in the Sun and on Earth. Helium is the second most abundant element in the universe and has various applications, including as a coolant in medical and scientific equipment, and in lighter-than-air balloons.

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Ai. The concentration of hydronium ion, [H₃O⁺], is 0.10 M

Aii. The concentration hydroxide ion, [OH⁻] is 1×10⁻¹³ M

Bi. The concentration of hydronium, ion [H₃O⁺], is 3.57×10⁻¹¹ M

Bii. The concentration hydroxide ion, [OH⁻] is 2.8×10¯⁴ M

i. The concentration of hydronium ion, [H₃O⁺] can be obtained as follow:

HCl(aq) + H₂O <=> H₃O⁺(aq) + Cl⁻(aq)

From the above equation,

1 mole of HCl  contains 1 mole of H₃O⁺

Therefore,

0.10 M HCl will also contain 0.10 M H₃O⁺

Thus, the concentration of hydronium ion, [H₃O⁺] is 0.10 M

ii. The concentration of hydroxide ion, [OH⁻] can be obtained as follow:

[H₃O⁺] × [OH⁻] = 10¯¹⁴

0.10 × [OH⁻] = 10¯¹⁴

Divide both side by 3.02×10⁻¹⁰

[OH⁻] = 10¯¹⁴ / 0.10

[OH⁻] = 1×10⁻¹³ M

Thus, concentration of hydroxide ion, [OH⁻] is 1×10⁻¹³ M

First, we shall obtain concentration hydroxide ion, [OH⁻]. Details below:

Mg(OH)₂(aq) <=> Mg²⁺(aq) + 2OH⁻(aq)

From the above equation,

1 mole of Mg(OH)₂ is contains 2 mole of OH⁻

Therefore,

1.4×10¯⁴ M Mg(OH)₂ will contain = 1.4×10¯⁴ × 2 = 2.8×10¯⁴ M OH⁻

Thus, concentration hydroxide ion, [OH⁻] is 2.8×10¯⁴ M

Now, we shall obtain the concentration of hydronium, ion [H₃O⁺]. Details below:

[H₃O⁺] × [OH⁻] = 10¯¹⁴

[H₃O⁺] × 2.8×10¯⁴ = 10¯¹⁴

Divide both side by 2.8×10¯⁴

[H₃O⁺] = 10¯¹⁴ / 2.8×10¯⁴

[H₃O⁺] = 3.57×10⁻¹¹ M

Thus, the concentration of hydronium, ion [H₃O⁺], is 3.57×10⁻¹¹ M

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4th pic is solid, gas

and the other one is further apart; increase

5th pic for second question is D

and the first question is kinetic energy

yw bakugo

The four steps to explain how an electric motor works are as follows:

1. The wire loop is placed between the poles of a permanent magnet, and it is attached to a commutator. Current flows through the wire, creating an electromagnet.

2. The direction of the current is switched, causing the poles of the electromagnet to switch as well. This reversal of the magnetic field allows for continuous rotation.

3. Electromagnetic forces occur as the electromagnet interacts with the permanent magnet. These forces cause the electromagnet to start rotating.

4. The rotation of the electromagnet continues, leading to a change in the direction of the current as the wire turns. This continuous change in current direction sustains the rotation of the electromagnet.

In summary, an electric motor works by utilizing a loop of wire placed between the poles of a permanent magnet, which is attached to a commutator. When current flows through the wire, it creates an electromagnet. By switching the direction of the current, the poles of the electromagnet also switch, causing a reversal of the magnetic field. This interaction between the electromagnet and the permanent magnet results in electromagnetic forces that lead to the rotation of the electromagnet. The continuous rotation is sustained by the ongoing change in the direction of the current as the wire turns.

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Answer:

A tundra is less humid than a desert

Explanation: