Why do atoms form bonds with other atoms?
SELECT ALL THAT APPLY
a
To ensure that both atoms in the bond have eight total
electrons.
b To obey the octet rule.
С
To fill the outer electron shells of both atoms.
d
To achieve a more stable electron configuration for both
atoms.

In a water molecule, the hydrogen atoms are bonded to an oxygen atom by polar covalent bonds while neighboring water molecules are held together by hydrogen bonds.

Water can be defined as a liquid molecule that typically contains two (2) main chemical elements in the ratio of two (2) to one (1) [2:1]. These two (2) chemical elements are:

In a water molecule, two (2) atoms of hydrogen bonds with an atom of oxygen through two (2) covalent bonds.

Additionally, the two (2) atoms of hydrogen are bonded to an oxygen atom by polar covalent bonds while neighboring water molecules are held together by hydrogen bonds.

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A compound that would yield a positive test for carboxylic acid but would not be water-soluble is a long-chain carboxylic acid.

An example of such a compound is stearic acid (C17H35COOH). The structural formula for stearic acid is:

CH3(CH2)16COOH

This compound contains a carboxylic acid group (-COOH) which is responsible for the positive test for carboxylic acid. However, due to its long hydrocarbon chain, it has limited solubility in water, making it not water-soluble.

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The mean wake time of 104.0 min before treatment is outside the 99% confidence interval of the mean wake time after treatment, it suggests that the drug is effective. This is further confirmed by the significant decrease in the mean wake time after treatment of 94.1 min. Therefore, it can be concluded that the drug is effective in treating insomnia in older subjects.

A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects. Before treatment, 16 subjects had a mean wake time of 104.0 min.

After treatment, the 16 subjects had a mean wake time of 94.1 min and a standard deviation of 23.7 min.

Assume that the 16 sample values appear to be from a normally distributed population and construct a 99% confidence interval estimate of the mean wake time for a population with drug treatments.

The formula for the confidence interval of the mean is:

\($$\overline{X} \pm z_{\alpha/2} \frac{s}{\sqrt{n}}$$\)

Here,

\($z_{0.005} = 2.576$\) for a 99% confidence interval as

\($α/2 = 0.005$\)

and the degrees of freedom is 15 since \($n-1=15$\).

Now, substituting all the values:

\($$94.1 \pm 2.576 \times \frac{23.7}{\sqrt{16}}$$\)

The calculation gives a 99% confidence interval estimate of the mean wake time of 94.1 ± 15.4 min (rounded off to one decimal place).

The mean wake time of 104.0 min before treatment is not within the 99% confidence interval of the mean wake time after treatment. This indicates that there is a significant decrease in the mean wake time after treatment.

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Answer:

Double replacement

Explanation:

Answer:

57.4 g

Explanation:

30.4 g Al will produce 57.4 g Al 2 O 3 30.4 g O 2 will produce 64.6 g Al

2 O 3 .The limiting reagent is aluminum, and the maximum amount of aluminum oxide that can be produced in this reaction is 57.4 g

Answer:

The velocity of the bb when it reaches a height of 203 m can be determined using the laws of projectile motion. Since the bb is moving vertically upwards, its velocity at that height will be zero.

brainlest?

Answer: v = 83.96 m/s

Assuming the acceleration due to gravity is approximately 9.8 m/s^2, we can use the principles of projectile motion and energy conservation.

Using the equation for the vertical displacement of an object in free fall:

Δy = (v₀² - v²) / (2g)

Δy = vertical displacement (203m)

v₀ = initial velocity (105 m/s)

v = final velocity (not known yet)

g = accerlation due to gravity (9.8 m/s^2)

Lets rearrange the equation to solve for the final velocity:

v = v = √(v₀² - 2gΔy)

Substituting the given values:

v = √(105² - 2 * 9.8 * 203)

v ≈ √(11025 - 3979.6)

v ≈ √(7054.4)

v ≈ 83.96 m/s

Therefore, when the BB pellet is at the height of 203m, its velocity will be approximately 83.96 m/s.

Answer:

the Germany scientist Alfred Wagner describes fold mountains that are found in The world are the same also geological similarity that occur between this continent are the same for example the rock that are found in brazil are the same of that of south africa.

Answer:

Average atomic mass = F

1

M

1

+F

2

M

2

+...+F

n

M

n

Where F

1

,F

2

,...F

n

is the fraction representing the natural abundance of the isotope and M is the weight of the isotope.

Avg. At. Mass = (0.85×11)+(0.10×12)+(0.05×13)

= 9.35+1.2+0.65

Therefore, the average atomic mass = 11.2

Answer:

It is Noble-gas notation

Explanation:

Just did it on Edgenuity 2020

Two or more than two atoms with different physical or chemical properties can not combine together to form an element. Therefore, the given electronic configuration represents noble-gas notation​.

Element generally consist of atoms or we can atoms combine to form element. Atoms of an element is always same, means all the properties of all atoms of one type of element is same.

The systematic distribution of electrons in the various atomic orbitals is called its electronic configuration. The atomic number of argon is 18. The electronic configuration of argon is (Ne) 3s² 3p⁶. 1,2,3 represents the number of shells and s and represents the orbitals. The superscripts represents the number of electrons in each orbitals. The given electronic configuration represents  noble-gas notation​.

Therefore, the given electronic configuration represents noble-gas notation​.

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If x = − 4,  number line shows the value of |x| is 4 tick mark to the left of zero.

given that :

x = -4

The absolute value is the distance from zero. The absolute value is always positive.

| x | = | -4 | = 4

The absolute value = distance from the zero.

a number line contains negative and positive number . number to the right side of zero is positive and to  the left side of zero is negative. Absolute value means how far the number is from zero.

Thus, If x = − 4,  number line shows the value of |x| is 4 tick mark to the left of zero.

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Answer:

0.2 moles de SO₂

Explanation:

La reaccción es:

2H₂S (g) +  3O₂ (g)  →  2SO₂ (g)  +  2H₂O(g)

Asumimos que tenemos 0.250 moles de sulfuro y 0.3 moles de oxígeno.

En primer lugar tenemos que averiguar el reactivo limitante.

Si 2 moles de sulfuro de hidrógeno reaccionan con 3 moles de oxígeno, según la reacción.

Entonces 0.250 moles, reaccionarían con (0.250 . 3) /2 = 0.375moles

Tenemos entonces 0.3 moles de oxígeno y necesitamos 0.375 (no nos alcanza). Por lo tanto el O₂ es el limitante y ahora podemos calcular el producto formado. La ecuación nos dice:

3 moles de oxígeno pueden producir dos moles de SO₂

Entonces 0.3 moles (que son los que tenemos) de O₂ producirían:

(0.3 . 2) /3 = 0.2 moles de SO₂

The amount of work that has been done would be 72 Joules.

The work done by a body can be defined as the amount of energy transferred from one body to another body.  In other words, work is the product of force and the distance moved by the force.

This can be expressed mathematically as:

Work = force x distance moved by the force.

In this case:

Force = 12 newton

Distance = 6 meters

Work done = 12 x 6

                   = 72 NM or 72 Joules

In other words, if I move a 12 Newton box by 6 meters across the floor, the amount of work done would be 72 Joules.

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In 0.75 moles of caffeine, there are a total of 6 carbon atoms, 7.5 hydrogen atoms, 3 nitrogen atoms, and 1.5 oxygen atoms.

To determine the total number of atoms in 0.75 moles of caffeine, we need to consider the molecular formula of caffeine, which is C8H10N4O2. The molecular formula provides the ratios of each element present in the compound. By multiplying the number of atoms in each element by the corresponding coefficient in the molecular formula, we can calculate the total number of atoms. In this case, there are 8 carbon (C) atoms, 10 hydrogen (H) atoms, 4 nitrogen (N) atoms, and 2 oxygen (O) atoms in each molecule of caffeine. Multiplying these values by 0.75 moles will give us the total number of atoms in 0.75 moles of caffeine.

The molecular formula of caffeine, C8H10N4O2, provides the number of atoms for each element present in one molecule of caffeine. In this case, there are 8 carbon (C) atoms, 10 hydrogen (H) atoms, 4 nitrogen (N) atoms, and 2 oxygen (O) atoms.

To calculate the total number of atoms in 0.75 moles of caffeine, we need to multiply the number of atoms for each element by the coefficient in the molecular formula, and then multiply that by the number of moles (0.75 moles).

For carbon (C): 8 atoms x 0.75 moles = 6 atoms (since there are 8 carbon atoms in one molecule of caffeine).

For hydrogen (H): 10 atoms x 0.75 moles = 7.5 atoms (since there are 10 hydrogen atoms in one molecule of caffeine).

For nitrogen (N): 4 atoms x 0.75 moles = 3 atoms (since there are 4 nitrogen atoms in one molecule of caffeine).

For oxygen (O): 2 atoms x 0.75 moles = 1.5 atoms (since there are 2 oxygen atoms in one molecule of caffeine).

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Answer:

A. It allows doctors to view internal body structures to help them diagnose illness.

Explanation:

The statement, that describes fiber-optic technology benefits the field of medicine is "it allows doctors to view internal body structures to help them diagnose illnesses."

Fiber optics is a technology that transmits information as light pulses across great distances using strands of glass or plastic fibre. Fiber-optic cables use light pulses that travel quickly to convey data.

Internal organs and tissue can be viewed through bodily orifices because to the flexible yet hard multi-fibers. Endoscopes are used by doctors to explore symptoms such as nausea and gastrointestinal pain, confirm diagnosis through biopsies, and provide medical therapy.

Medical fibre optics are an important medical technology that is employed in a variety of medical professions. They are chemically inert, sterile, malleable, and non-toxic to the human body. Fiber optic technology enables surgeons to repair organs, diagnose joint problems, and remove sick tissues, resulting in a faster recovery period for the patient than more intrusive surgical approaches.

Hence the correct answer is it allows doctors to view internal body structures to help them diagnose illnesses.

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The compound formula can be determined from the charge of the constituent elements of the compound

There are several compounds :

ion compounds, covalent compounds, and polyatomic  

For ionic compounds consisting of cations (ions +) and anions (ions -)  

The naming is preceded by the cation then the anion with the -ide suffix added  

Generally for this ion compound consists of metal elements as cations and non-metals as anions  

1. Mg²⁺, Br⁻

2. no, +2(Mg) + -1(Br)=+2-1=+1

3. Mg²⁺ 1 ion, Br⁻ need 2 ion

4. MgBr₂, 1 Mg and 2 Br

1. Zn²⁺, P³⁻

2. no, +2(Zn)+ -3(P)=2-3=-1

3. Zn need 3 ion, P 2 ion

4. Zn₃P₂, 3 Zn and 2 P

it's true ....

plz mark my answer as brainlist plzzzz vote me also

To calculate the pH of a solution with chloroacetic acid and sodium chloroacetate, we need to use the Henderson-Hasselbalch equation with known values of pKa, [A-], and [HA].

To calculate the pH of the solution containing chloroacetic acid (a weak acid) and sodium chloroacetate (its conjugate base), we can use the Henderson-Hasselbalch equation:
pH = pKa + log10 ([A-] / [HA])
where pH is the solution's pH, pKa is the acid dissociation constant of the weak acid, [A-] is the concentration of the conjugate base (sodium chloroacetate), and [HA] is the concentration of the weak acid (chloroacetic acid).  the values for pKa, [A-], and [HA]. If you provide these values.

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The products are formed when the compound react with ozone and then with the dimethyl sulfide is the  Pentan-2-one and the propan-2-one.

A cyclic intermediate is known as the molozonide is formed when ozone molecule react the double bond of the compound, then forming the primary ozonide. The Aldehydes and the ketones are the examples of the carbonyl compounds, that are formed when the ozonide molecule is further broken down.

The Dimethyl sulphide will causes the ozonide molecule that go through the reductive workup and then produce the ketone. The Dimethyl sulphide then reduces the main ozonide and it will produce the aldehydes or the  ketones.

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It is established that the mole consists of precisely 6.022×10²³ elementary components. 8.0mol of Ag form from 8.0 mol AgNO\(_3\).

The International System of Units uses the mole (symbol: mol) as the unit of material quantity (SI). How many elementary units of a certain substance are present in an item or sample is determined by the quantity of that material.

It is established that the mole consists of precisely 6.022×10²³ elementary components. An elementary thing may consist of an atom, the molecule, and ion, and ion pair, or perhaps a subatomic particle like an electron dependent on what the material is.

2AgNO\(_3\) + Zn → 2Ag + Zn(NO\(_3\))\(_2\)

moles of AgNO\(_3\)=  8.0mol

the mole ratio between AgNO\(_3\) and Ag is 1:1

moles of Ag = 8.0mol

Therefore, 8.0mol of Ag form from 8.0 mol AgNO\(_3\).

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The option that would be true about the shape of the truck is that the truck keeps its shape. Thus, the correct option is D.

The volume of a solid may be defined as the process of measuring the overall space that an object takes up in its physical structure.

The volume of any solid alters with respect to its shape. If its shape increases, the volume definitely increases, while if its shape decreases, the volume ultimately reduces.

Therefore, the option that would be true about the shape of the truck is that the truck keeps its shape. Thus, the correct option is D.

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The boiling point of the solution will increase and the freezing point will decrease when diluted with an additional 100 grams of water.

When a solute is dissolved in a solvent, it affects the boiling and freezing points of the solution. Adding 100 grams of water to the solution dilutes it, meaning the concentration of the solute decreases. Dilution generally results in an increase in boiling point and a decrease in freezing point.

The boiling point elevation occurs because the presence of the solute particles disrupts the formation of vapor bubbles during boiling. By diluting the solution, the concentration of the solute decreases, leading to a decrease in the disruption of vapor bubble formation and thus an increase in boiling point.

Similarly, the freezing point depression occurs because the solute particles interfere with the formation of the solid lattice during freezing. By diluting the solution, the concentration of the solute decreases, reducing the interference and resulting in a decrease in the freezing point.

Therefore, when the solution is diluted with an additional 100 grams of water, the boiling point will increase, and the freezing point will decrease.

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The statement "molecules move in random directions when heated in a heat engine, and because of the lack of uniformity in the direction of molecular movement" is true.

When a heat engine is heated, molecules absorb heat energy and their kinetic energy increases. The kinetic energy of molecules causes them to move around. However, this movement is not uniform, and the molecules move in random directions.

A heat engine is a device that converts thermal energy into mechanical energy. Heat engines operate on the principle of thermodynamics.

They work by taking in thermal energy from a high-temperature reservoir, converting some of it into mechanical energy, and then releasing the remaining thermal energy to a low-temperature reservoir.The internal combustion engine in a car, the steam engine in an old locomotive, and the turbine in a power plant are all examples of heat engines. They all convert heat energy into mechanical energy to perform work.

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Answer:

The answer that completes the question are in BOLD:

At chemical equilibrium, the amount of PRODUCT AND REACTANT REMAIN CONSTANT because the RATES OF THE FORWARD AND REVERSE REACTIONS ARE EQUAL.

Explanation:

In a reversible chemical reaction, an equilibrium is said to be achieved when the rates of the forward reaction is equal to that of the reverse reaction. A reversible reaction is one in which products are formed from reactants simultaneously with the formation of reactants from products.

The combination of two or more substances called REACTANTS gives rise to another substance called PRODUCT, which can in turn give rise to Reactants again. With time, the rate at which the reactants give rise the products, which is called the FORWARD REACTION will be equal to the rate at which the products give rise to the reactants, which is called REVERSE REACTION. At this point, the chemical reaction is said to be in a STATE OF EQUILIBRIUM.

When the rate at which both reaction occurs becomes equal i.e. at an equilibrium state, the concentration of both the reactants and the products becomes constant i.e. no longer changes. Hence, the amount of the reactants forming the products is the same as the amount of products forming the reactants.

N.B: At chemical equilibrium, the amount of the reactants and products does not necessarily equals zero (0). It simply means that there is no net change in the concentration/amount of both reactants and products.

Answer:

See explanation

Explanation:

Recall that;

Speed = Distance/time

Distance = Speed * time

Speed = 200 km/h

Time = 4 hours

Distance = 200 km/h * 4 hours = 800 kilometres

Displacement has to do with distance covered in a specified direction, in this case, the direction is towards Zambales.

Hence, the displacement is  800 kilometres towards Zambales.

Answer:

The five basic types of chemical reactions are combination, decomposition, single-replacement, double-replacement, and combustion. Analyzing the reactants and products of a given reaction will allow you to place it into one of these categories.

Explanation:

Answer: try 42.8

Explanation: you might have to round to 42.8 because of the significant  figures

Answer:

then the cause of Corona is a gas leak

Answer:

Maybe because we have different skin tone we have white, dark, brown or we might not speak the same language as them or look like them they are going to be confused

Explanation: