(?)Li2O + (?)H2O → (?)LiOH

The atom that is paramagnetic in its ground electronic state is Option (C) Li. The set of quantum numbers that is not possible for an electron is Option (E) n = 1, l = 0, ml = 0.

Paramagnetic atoms:

Paramagnetic atoms have unpaired electrons in their ground electronic state, which means they have at least one electron with a spin that is not canceled out by pairing with another electron.

A) He: Helium has a ground state configuration of 1s², with two paired electrons. It is diamagnetic, not paramagnetic.

B) Zn: Zinc has a ground state configuration of [Ar]3d¹⁰4s², with completely filled d and s subshells. It is diamagnetic, not paramagnetic.

C) Li: Lithium has a ground state configuration of 1s²2s¹, with one unpaired electron in the 2s orbital. It has an unpaired electron and is paramagnetic.

D) O: Oxygen has a ground state configuration of 1s²2s²2p⁴, with two unpaired electrons in the 2p orbitals. It has unpaired electrons and is paramagnetic.

E) Mg: Magnesium has a ground state configuration of [Ne]3s², with completely filled p orbitals. It is diamagnetic, not paramagnetic.

Quantum numbers:

Quantum numbers describe the properties and characteristics of an electron within an atom.

A) n = 2, l = 1, ml = 0: This set of quantum numbers represents a valid electron configuration within the second energy level, with an orbital angular momentum quantum number (l) of 1 and a magnetic quantum number (ml) of 0.

B) n = 4, l = 1, ml = +1/2: This set of quantum numbers represents a valid electron configuration within the fourth energy level, with an orbital angular momentum quantum number (l) of 1 and a magnetic quantum number (ml) of +1/2.

C) n = 2, l = 1, ml = -1: This set of quantum numbers represents a valid electron configuration within the second energy level, with an orbital angular momentum quantum number (l) of 1 and a magnetic quantum number (ml) of -1.

D) n = 3, l = 2, ml = 1: This set of quantum numbers represents a valid electron configuration within the third energy level, with an orbital angular momentum quantum number (l) of 2 and a magnetic quantum number (ml) of 1.

E) n = 1, l = 0, ml = 0: This set of quantum numbers represents a valid electron configuration within the first energy level, with an orbital angular momentum quantum number (l) of 0 and a magnetic quantum number (ml) of 0. Therefore, this set is possible and valid.

The atom that is paramagnetic in its ground electronic state is C) Li. It has an unpaired electron in its 2s orbital. The set of quantum numbers that is not possible for an electron is E) n = 1, l = 0, ml = 0. The other options represent valid electron configurations based on the principles of quantum mechanics.

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Sea Arches are formed when a cave continues to be eroded and expanded until it cuts through a headland.

A sea cave forms when a sea arch pursues to be eroded and widened until the rock becomes too weak to carry the roof of the sea cave and collapses into the sea. Caves are devised by the dissolution of limestone. Rainwater collects carbon dioxide from the air and as it percolates through the soil, which rotates into a weak acid.

Sea caves occur on almost every precipice headland or coast where the waves break straight on a rock cliff and are formed Sea caves by mechanical erosion rather than the chemical solution procedure that is responsible for the majority of inland caves.

So we can conclude that Sea caves or littoral caves are formed fundamentally from erosion caused by waves

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Answer:

D

Explanation:

It increases fast.

Answer:

C

Explanation:

because when rocks break down they can form and once they form they can make more and even bigger rocks hopes this helps.

Answer:

219.73 g

Explanation:

The molecular formula of zinc (II) oxide is ZnO. This means its molar mass would be:

With that molar mass, we can convert moles into grams:

Explanation:

The pH of a substance with a hydrogen ion concentration of 1.2 ×10−2 M can be determined using the equation:

pH = -log[H+]

where [H+] is the concentration of hydrogen ions in moles per liter (M).

Substitute the given value of [H+] in the above equation:

pH = -log(1.2 ×10−2)

pH = -(-1.92) (taking antilog of -log(1.2 ×10−2) using a calculator)

pH = 1.92

Therefore, the pH of the substance is 1.92.

The pH scale is a logarithmic scale that measures the acidity or basicity of a substance. At neutral pH (pH 7), the concentration of hydrogen ions and hydroxide ions are equal. As the pH decreases, the acidity increases due to an increase in the concentration of hydrogen ions. A pH of 1.92 indicates that the substance is acidic as it has a higher concentration of hydrogen ions than hydroxide ions.

PLS mark my answer brainliest

The pH of a substance that has a hydrogen ion concentration of 1.2 × 10⁻² M is approximately 1.92.

To determine the pH of a substance with a hydrogen ion concentration of 1.2 × 10⁻² M, you can use the pH formula:

pH = -log₁₀[H⁺]

Where pH is the measure of acidity or alkalinity, measured on a scale of 0 - 14, -log₁₀ is the logarithm base 10, and [H⁺] represents the hydrogen ion concentration.

Plugging in the given concentration:

pH = -log₁₀(1.2 × 10⁻²)

Calculating the pH value:

pH ≈ 1.92

The pH of the substance is approximately 1.92, which indicates that it is acidic.

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An electron with quantum numbers n=5, l=0, ml=0, ms=-1/2 is located in the 5s orbital.

The set of quantum numbers given as n=5, l=0, ml=0, ms=-1/2 represents an electron in the 5s orbital. The principal quantum number (n) is 5, which indicates that the electron is in the fifth energy level or shell.

The angular momentum quantum number (l) is 0, which indicates that the electron is in an s orbital (l=0 for an s orbital). The magnetic quantum number (ml) is 0, which specifies the orientation of the orbital in space and indicates that the s orbital is spherically symmetrical (with no preferred orientation).

Finally, the spin quantum number (ms) is -1/2, which indicates that the electron has a spin of -1/2 (i.e., it spins counterclockwise).

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Answer:

Viscosity

Explanation:

Sijui kuexpalain lakini

Answer:

Explanation:

apart from boiling point and flammability viscosity density and solubility are those qualities of hydrocarbon which are effected by their size

Answer:

negitive 5 or -5

Explanation

usally 12-7 = 5 but 7 is first so it you turn 5 to negitive 5

or -5

Answer: 185 grams

Explanation: First find out how many grams are in one mol: The molar mass es are taken from the periodic table, Ca is 40, O is 16, H is 1. There are 2 O and 2 H for (OH)2: 40+32+2= 74g/mol x 2.5 mol = 185 the moles cancel and you are left with grams

The right answer is true. It is accurate to say that because liquids and solids are almost incompressible, pressure has little impact on their solubility.

We are aware that the concept of compressibility refers to how the study object's qualities can alter simply by applying pressure on it. Whether or not a solid, liquid, or gas can have a solubility that is influenced by the substance's pressure depends on the compressibility factor. We must keep in mind that when we discuss pressure in science, our thoughts must immediately turn to the force per unit area of the substance that is being investigated in each specific example. Because the solid and liquid have a fixed volume while the gas does not, the gas will take on the volume of the container it is carried in, proving that the solid and liquid are less compressible than the gas.

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It is accurate to say that because liquids and solids are nearly incompressible, pressure has minimal impact on their solubility.

Pressure has very little or no impact on how easily particles dissolve in liquid. This is due to the fact that solids and liquids are largely unaffected by changes in pressure due to their incompressibility. The solubility, which depends on gas pressure, is a measurement of the concentration of dissolved gas particles in the liquid. A gas's solubility increases with higher pressure while falling with lower pressure because of an increase in collision frequency. · The solubility of liquids and solids is mostly unaffected by external pressure. The concentration of dissolved gas molecules in the solution at equilibrium is higher at higher pressures because the concentration of molecules in the gas phase rises with increasing pressure.

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The pH of a 0.2 M solution of an amine with a pKa of 9.5 is approximately 11.4.

To calculate the pH of a solution of an amine with a pKa of 9.5, you can use the Henderson-Hasselbalch equation:

pH = pKa + log([A-]/[HA])

In this case, the amine acts as a base and can be represented as HA (the protonated form) and A- (the deprotonated form). The pKa value represents the equilibrium constant for the dissociation of the amine.

Given:

pKa = 9.5

[A-]/[HA] = 0.2/0.8 = 0.25 (since the solution is 0.2 M)

Now, substitute the values into the Henderson-Hasselbalch equation:

pH = 9.5 + log(0.25)

= 9.5 + (-0.602)

≈ 11.4

Therefore, the pH of a 0.2 M solution of an amine with a pKa of 9.5 is approximately 11.4.

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The elaboration likelihood model emphasizes the use of direct persuasion and peripheral persuasion methods.

What is direct persuasion and peripheral persuasion?

This theory involves a dual process which explains how attitudes are changed in individuals through persuasion.

These methods help in the formation of attitude which makes, in this case,  option use of direct persuasion and peripheral persuasion.

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Answer:

C. direct . . . peripheral

Explanation:

Because I said so.

Fertilizer from suburban lawns and wastewater from a water treatment plant.

What is fertilizer?

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Answer:

Of the options below, which is an example of a point source of water pollution?

Litter and pet waste are left on a city’s beaches.

Landscapers' fertilizers and pesticides are sprayed on the lawns of a neighborhood.

Acidic runoff from abandoned mines contains lead and mercury that saturate the soil.

A factory’s wastewater pipe opens directly over a nearby river.

CONCEPT

Explanation:

Correct Answer:

A factory’s wastewater pipe opens directly over a nearby river.

Answer:

oil floats on water because it is heavier than water

Salt is no longer visible after stirring as salt dissolves in water

by filtration

Answer:

16:A

17:C

18:A

19B

Explanation:

The balanced chemical equation for the reaction between thiosulfate ions (S2O3²-) and protons (H+) to form sulfur dioxide (SO2), elemental sulfur (S), and water (H2O) is as follows:

2 S2O3²- + 2 H+ → 3 SO2 + S + 2 H2O

In this reaction, two thiosulfate ions and two protons react to produce three molecules of sulfur dioxide, one molecule of elemental sulfur, and two molecules of water.

Let's break down the reaction step by step:

Reactants:

Thiosulfate ions (S2O3²-) are polyatomic ions composed of two sulfur atoms and three oxygen atoms. Protons (H+) are hydrogen ions.

Formation of sulfur dioxide:

Each thiosulfate ion (S2O3²-) reacts with one proton (H+) to yield one molecule of sulfur dioxide (SO2). This occurs twice in the reaction.

2 S2O3²- + 2 H+ → 2 SO2 + ...

Formation of elemental sulfur: After the formation of sulfur dioxide, the remaining sulfur atoms combine to form elemental sulfur (S).

2 S2O3²- + 2 H+ → 2 SO2 + S...

Formation of water: Lastly, the remaining protons (H+) from the reaction combine with the oxygen atoms to produce water (H2O). Two molecules of water are formed in the reaction.

2 S2O3²- + 2 H+ → 2 SO2 + S + 2 H2O

By balancing the equation, we ensure that the number of atoms on both sides of the equation is equal. The balanced equation represents the stoichiometry of the reaction, showing the relative amounts of each reactant and product involved.

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The volume of the extracellular fluid compartment is 160 mL and the volume of the total body water compartment is 48,000 mL.

The volumes of the extracellular fluid compartment and the total body water compartment can be determined from the given data. To determine the volume of the extracellular fluid compartment, we can use the following formula:
Volume of extracellular fluid = (amount of inulin injected) / (plasma inulin concentration)
Plugging in the given values:
Volume of extracellular fluid = (80 mg) / (0.5 mg%)
Volume of extracellular fluid = 160 mL
To determine the volume of the total body water compartment, we can use the following formula:
Volume of total body water = (amount of 3H2O injected) / (plasma 3H2O concentration)
Plugging in the given values:
Volume of total body water = (960,000 cpm) / (20 cpm/mL)
Volume of total body water = 48,000 mL

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Answer:

Outermost zone

Explanation:

Because the outermost zone is the hottest part of the flame.

Answer:

outer most zone

Explanation:

The outermost zone is used by a goldsmith for melting gold and silver. This is because it is the hottest zone of the flame where complete combustion takes place.

12 moles O2 is a possible way to describe the elemental oxygen component in the reaction.

Define elemental oxygen form?

At normal temperatures and pressures, elemental oxygen is present as a gas, most frequently in the form of O2. This crucial ingredient, which is a crucial part of cellular respiration, is required for life on this planet.

This oxidation-reduction (redox) reaction is taking place:

8 S - 48 e- → 8 S (oxidation)

24 O + 48 e- → 24 O- (reduction)

O2 is an oxidizing agent, whereas S8 is a reducing agent.

Because each substance contains a huge number of atoms and molecules, we use the mole (mol) to express the amount of substances in chemistry. For the researcher who discovered how many atoms there are in 12 grams of carbon, the value provided, 6.022 x 1023 is known as Avogadro's number.

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Answer: D: both teams will remain in place.

Explanation: if both teams have the same amount of force, they will cancel each other out and stay in place.

The concept of energy balance refers to the equilibrium between the energy input into a system and the energy output from that system. It is based on the principle of conservation of energy, which states that energy cannot be created or destroyed but can only be transferred or transformed from one form to another.

In terms of human energy balance, it involves the energy intake from food and beverages (energy in) and the energy expenditure through basal metabolic rate, physical activity, and other bodily processes (energy out). When the energy intake matches the energy expenditure, there is an energy balance. However, when there is an imbalance, either an excess or deficit of energy, it can lead to weight gain or weight loss, respectively.

For example, if a person consumes 2000 calories (energy in) through their diet and expends 2000 calories (energy out) through their daily activities and bodily functions, they maintain an energy balance. This means that the energy intake is equal to the energy expenditure, and their weight remains stable.

On the other hand, if a person consumes 2500 calories (energy in) but only expends 2000 calories (energy out), there is a positive energy balance. The excess energy is stored in the body as fat, leading to weight gain over time.

Conversely, if a person consumes 1500 calories (energy in) but expends 2000 calories (energy out), there is a negative energy balance. The body needs to compensate for the energy deficit by utilizing stored energy reserves, such as fat, resulting in weight loss.

Support for the concept of energy balance comes from scientific studies on weight management and obesity. It has been shown that maintaining an energy balance is crucial for weight maintenance, while sustained positive or negative energy balances can lead to weight changes. Additionally, energy balance plays a role in various physiological processes, including metabolism, hormone regulation, and overall health.

By understanding and managing energy balance, individuals can make informed decisions regarding their diet, physical activity, and lifestyle to achieve and maintain a healthy weight and overall well-being.

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Answer:

3

Explanation:

Applying,

\(2^{n'}\) = R/R'............... Equation 1

Where n' = number of halflives that have passed, R = Original atom of the substance, R' = atom of the substance left after decay.

From the question,

Given: R = 40 atoms, R' = 5 atoms

Substitute these values into equation 1

\(2^{n'}\) = 40/5

\(2^{n'}\) = 8

\(2^{n'}\) = 2³

Equation the base,

n' = 3

The correct option from the given statements concerning mixtures is (d) more than one correct response.

The statement (a) "The composition of a homogeneous mixture cannot vary" is incorrect as the composition of a homogeneous mixture can vary. For example, a mixture of salt and water is homogeneous and its composition can vary depending on the amount of salt and water mixed in it.

The statement (b) "A homogeneous mixture can have components present in two physical states" is correct. Homogeneous mixtures are mixtures that are uniform throughout their composition, meaning that there is no visible difference between the components of the mixture. For example, a mixture of ethanol and water is homogeneous and its components are present in two physical states (liquid and liquid).

The statement (c) "A heterogeneous mixture containing only one phase is an impossibility" is incorrect. A heterogeneous mixture is a mixture where the components are not evenly distributed and the mixture has different visible regions or phases. However, it is possible for a heterogeneous mixture to contain only one phase. For example, a mixture of oil and water is heterogeneous but can have only one phase.

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Answer:

We balance chemical equations due to the law of conservation of mass, which states that mass can neither be created or destroyed. Therefore, in a chemical reaction, the total mass of the reactants must be equal to the total mass of the products. Balancing equations accounts for the total mass of the reactants and the total mass of the products.

Explanation:

We balance chemical equations due to the law of conservation of mass, which states that mass can neither be created or destroyed. Therefore, in a chemical reaction, the total mass of the reactants must be equal to the total mass of the products. Balancing equations accounts for the total mass of the reactants and the total mass of the products.

Answer:

to satisfy the law of conservation of matter.

the law of conservation states that matter can not be created nor destroyed.

Answer: m = nM= 242.8 g

Explanation: amount of MgCl2 is same as n(Mg)

M(MgCl2) = 95.21 g/mol

95.21 g/mol is the mass in grams of MgCl\(_2\) are produced by 2.55 mol Mg in the reaction Mg + 2HCl ⟶ MgCl\(_2\) + H\(_2\).

A body's mass is an inherent quality. Prior to the discoveries of the concept of atom as well as particle physics, it was widely considered to be tied to the amount of matter inside a physical body. It was discovered that, despite having the same quantity of matter in theory, different atoms and elementary particles have varied masses.

There are various conceptions of mass in contemporary physics that are theoretically different but physically equivalent. The resistance of the body to accelerate (change of velocity) in the presence of a net force can be measured experimentally as mass. The gravitational pull an object has on other bodies is also influenced by its mass.

m = n×M= 242.8 g

M(MgCl\(_2\)) = 95.21 g/mol

Therefore, 95.21 g/mol is the mass in grams of MgCl\(_2\) are produced by 2.55 mol Mg in the reaction Mg + 2HCl ⟶ MgCl\(_2\) + H\(_2\).

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