which compound is most likely to be held together by a covalent bond based on the electronegativity difference between its two atoms?
A- CO
B- CaBr
C- NO
D- NaCl

The lenght multiply with the tall and the tichkness

291.43mL

According to the combined gas law;

where:

• P₁ and P₂ are the, initial and final pressure, respectively

• V₁ and V₂ are the, initial and final volume, respectively

• T₁ and T₂ are the ,initial and final temperature, respectively (in Kelvin)

Given the following parameters

Substitute the given parameters into the formula to get the final volume V₂

On substituting these values

Hence its volume at a temperature of 80.0 °C and a pressure of 180 kPa is 291.43mL

A chemical  reaction involves the interaction of reactants. The substance X ,must be an acid and in this case is CH3COOH

In chemistry, a reaction is said to occur when substances interact in such a way that other new substances are formed.

Now let us look at the particular reaction; NaOH + X ----> NaCH3COO + H2O. The substance X must be an acid. Hence, the most likely susbstance is CH3COOH.

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In Science, went to atom slam together to form a heavier atom this phenomena is called fusion.

Went two atoms slam together to form a heavier item this process is called nuclear fusion in science.

When they are to unstable atoms they combine with each other in order to form a stable atom that is much more heavier.

In the process of recombination energy is released by the items which can be given by the mass energy equivalence,

E = ∆mc²

Where,

∆m is the change in mass during the recombination and c is the speed of light.

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Explanation:

The polarity of a bond is given by the difference in electronegativity between the two atoms that form said bond.

Answer:

2

Explanation:

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:

Chemical Property

Explanation:

It is a chemical change.

Answer:

its a chemical property

A certain mass of a gas occupies 2 litres at 27°C and 100 Pa. ... is the force which when acts on a body of mass 1 kg, produces an acceleration of 1 m s-2.

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The pH of the buffered solution is 4.374.

A buffered solution is a solution that resists changes in pH when small amounts of acid or base are added to it.

In order to calculate the pH of a buffered solution, we need to use the Henderson-Hasselbalch equation, which is pH = pKa + log([A-]/[HA]). In this equation, pKa is the dissociation constant of the weak acid (benzoic acid in this case), [A-] is the concentration of the conjugate base (sodium benzoate), and [HA] is the concentration of the weak acid.

First, we need to find the concentrations of benzoic acid and sodium benzoate in the solution. We can use the equation n = cV, where n is the number of moles, c is the concentration, and V is the volume.

For benzoic acid:
n = (21.5 g / 122.12 g/mol) = 0.176 mol
c = 0.176 mol / 0.2 L = 0.88 M
[HA] = 0.88 M

For sodium benzoate:
n = (37.7 g / 144.11 g/mol) = 0.262 mol
c = 0.262 mol / 0.2 L = 1.31 M
[A-] = 1.31 M

Next, we need to find the pKa of benzoic acid. The pKa of benzoic acid is 4.20.

Now we can plug in the values into the Henderson-Hasselbalch equation:
pH = 4.20 + log([1.31]/[0.88])
pH = 4.20 + log(1.49)
pH = 4.20 + 0.174
pH = 4.374

Therefore, the pH of the buffered solution is 4.374.

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Answer:

GOT YOU

Explanation:

Jotun (pollinator)

Norse(decomposer)

Its a point and click adventure game. Where you only have specific actions you can do with your mouse. The basic options are Inspect for notes or Pollinate pollinate the right plants to escape. Your goal and how to win is go through each level picking up the plants to pollinate leave the level. The only way to lose is if you are unable to find the right plants by a set amount of time. The story is your wife has been taken prisoner by Norse and you are alerted by this from a note. You go to a location and find a tower once you walk in the doors shut behind you and a screen appears saying "Get out of the room and to the top of the tower in an hour or she dies. Jotun escapes and gets to the top of the tower to find out his wife died long ago and Norse has been using her for food.

Answer:

The dating of rocks is important because:

Explanation:

its important  to know how the rocks have changed.

To determine which quantity is greater between 1.01 atomic mass units (amu) and 1.01 grams of hydrogen, we need to understand the relationship between atomic mass units and grams.

Atomic mass units (amu) are a unit of mass commonly used in chemistry to describe the mass of atoms and molecules. It is based on the mass of a specific isotope of carbon, where 1 amu is approximately equal to the mass of one proton or one neutron.

On the other hand, grams (g) are a unit of mass in the International System of Units (SI). They are commonly used to measure larger quantities of substances, such as elements or compounds.

To compare these two quantities, we need to convert between amu and grams. Since 1 amu is a very small unit compared to grams, we would expect that 1.01 grams of hydrogen would be greater than 1.01 amu of hydrogen.

To make the comparison, we can use the molar mass of hydrogen. The molar mass of hydrogen is approximately 1.008 grams per mole. A mole is a unit that represents a specific number of particles, which is 6.022 x 10^23 (Avogadro's number).

Since we have 1.01 grams of hydrogen, we can calculate the number of moles by dividing the mass by the molar mass:

Number of moles = mass (in grams) / molar mass

Number of moles = 1.01 g / 1.008 g/mol ≈ 1.00 moles

Therefore, 1.01 grams of hydrogen is approximately equal to 1.00 moles of hydrogen.

On the other hand, 1.01 amu of hydrogen refers to the mass of a single hydrogen atom. Since 1 amu is very close to the mass of a single proton, which is approximately 1.007 amu, we can infer that 1.01 amu is slightly greater than the mass of one hydrogen atom.

In conclusion, 1.01 grams of hydrogen is a larger quantity compared to 1.01 amu of hydrogen. The mass of hydrogen in grams represents a macroscopic amount, while the mass in amu refers to the atomic level of a single hydrogen atom.

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Dr. Ke-Qin Hu, a well-known expert in liver disease and director of UCI Health Liver and Pancreas Services, warns that taking or more four grams of acetaminophen in a 24-hour period could result in severe harm.

Proteins, liver enzymes, & bilirubin are just a few of the things that a liver blood test analyzes in your blood. This can aid in examining the condition of your liver and looking for indications of inflammation of damage. Infections with the liver, such as hepatitis B and C, can have an impact on your liver.

There are numerous nutrients that include certain elements or antioxidants that have been demonstrated to support liver function. The following are a few examples: grapefruit, berries, cranberries, fatty salmon, olive oil, even cruciferous vegetables as broccoli or Brussels sprouts.

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The correct option is C;  II and III

The gases obtained from a landfill sites are ammonia, hydrogen sulfide, methane, and carbon dioxide.

Of these gases, ammonia and hydrogen sulfide are responsible for the odor at  landfill sites.

The odor from burning landfill gas can have deleterious effects on the health of residents owing to its smelly odors.

Also, many air pollutants are produced when the constituents of landfill gas  are burnt.

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Answer:

This combination product contains 2 medications, acetaminophen and an antihistamine. Acetaminophen helps to reduce fever and/or mild to moderate pain (such as headache, backache, aches/pains due to muscle strain, cold, or flu).

Explanation:

it will help you. may be

Answer:

looooser

mark me brailist

The grams of zinc used at the beginning of the reaction between Zn and HCl were 0.512 g

This mass of zinc reacted with hydrochloric acid under normal conditions and 520 ml of H2 were collected.

To calculate the moles of H2, the ideal gas equation PV = nrt is used

Where

P = Pressure

V = Volume

n = moles

T = temperature

R = Gas constant

And it clears up

n = PV / Rt

Data

P = 28.3 mmHg = 0.372 atm

V = 520ml = 0.52L

n = ?

T = 28°C = 301.15K

R = 0.082 L atm/mol °K

n = PV / Rt

n = 0.372. 0.52L / 0.082 . 301.15

n = 0.19344 /24.6943

n = 0.0078 moles of H2

According to the balanced equation of the reaction, 1 mol of Zn produces 1 mol of H2, therefore 0.0078 mol of Zn were used.

To know the grams of Zn, its molecular weight (65.38 g/mol) is used.

65.38g Zn/1 mol x 0.0078 mol = 0.512g

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Answer:

In a polar covalent bond, the more electronegative atom pulls electrons closer and gains a slightly negative charge, while the less electronegative atom has a slightly positive charge.

Explanation:

The covalent bond is the chemical bond between two atoms where electrons are shared. This makes the atoms behave as a unit, which we call a molecule. Atoms interact with each other through the outermost electrons forming bonds.

In other words, the covalent bond is formed by sharing a pair of electrons between the two atoms, one coming from each atom. The shared pair of electrons is common to the two atoms and holds them together. So molecules are formed: small groups of atoms linked together by covalent bonds.

In covalent bonds a dipole forms. The atom with the highest electronegativity attracts electrons towards itself, forming a negative dipole around it since the electrons have a negative charge. In the atom with lower electronegativity, the dipole formed is positively charged, since it partially gives up its electrons.

This is, in a polar covalent bond, the more electronegative atom pulls electrons closer and gains a slightly negative charge, while the less electronegative atom has a slightly positive charge.

The sample of oxygen will occupy approximately 18.5 mL at -70 °C and the same pressure.

The force exerted by a gas on specific area is known as gas pressure..

As we know, (P₁ V₁) /(T₁) = (P₂V₂) /(T₂)

Given, P₁ is the initial pressure (452 torr); V₁ is initial volume (32.2 mL)

T₁ is initial temperature in Kelvin (30 °C + 273.15 = 303.15 K)

P₂ is final pressure (452 torr); V₂ is final volume (what we want to find)

T₂ is the final temperature in Kelvin (-70 °C + 273.15 = 203.15 K)

Now, V2 = (P₁ V₁ T₂) / (P2 T₁)

V₂ = (452 torr x 32.2 mL x 203.15 K) / (452 torr x 303.15 K)

V₂ ≈ 18.5 mL

Therefore, the sample of oxygen will occupy approximately 18.5 mL at -70 °C and the same pressure.

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Answer:

determines if a solution is acidic.

Explanation:

Explanation:

To solve this question, we need to use the Hess's Law.

Hess's Law states that: in a chemical reaction, the heat released or absorbed is constant and independent of the number of steps the reaction goes through. That is, the law states that the enthalpy change of a chemical reaction depends only on its initial state and its final state.

Hess's Law is also known as the law of the sum of heats of reaction, because the enthalpy change is equal to the sum of the changes in the steps through which the chemical reaction passes (intermediate reactions). The calculation is performed as follows:

- If the chemical reaction is inverted, the sign of the enthalpy change must also be inverted;

- If the equation is multiplied, the enthalpy change must also be multiplied;

- If dividing the equation, the enthalpy change must also be divided.

So we're going to invert, divide, or multiply each given equation in order to get the equation that the question gives us.

The equation the question gives us is:

4Al(s) + 3MnO2(s) --> 2Al2O3 (s) + 3Mn(s)

Let's multiply the first equation by 2:

4 Al + 3 O2 --> 2 Al2O3

ΔH = -1676 * 2 = -3,352 kJ

Let's invert and multiply by 3 the second equation:

3 MnO2 -> 3 Mn + 3O2

ΔH = -521 * 3 * (-1)

ΔH = 1,563 kJ

Answer: -1,789 kJ

The statement that best summarizes a consequence of the second law of thermodynamics is (c) "If the entropy of a system decreases, there must be a corresponding increase in the entropy of the universe."

The second law of thermodynamics states that the total entropy of an isolated system can only increase over time. Entropy is a measure of the amount of disorder or randomness in a system. In any energy conversion or chemical reaction, some of the energy becomes unusable or is lost as heat, which increases the entropy of the surroundings.

When the entropy of a system decreases, it means that the system becomes more ordered. However, this cannot happen without an increase in the entropy of the surroundings, such as the release of heat into the environment. This ensures that the total entropy of the universe increases, as dictated by the second law of thermodynamics.

In summary, if the entropy of a system decreases, there must be a corresponding increase in the entropy of the universe, maintaining the overall increase in entropy. This principle governs energy conversions and chemical reactions in various systems, including those in living organisms.

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Answer:

F

Cl

Br

I

Explanation:

Br=11.81...

Cl=12.96...

F=17.42...

Iodine=10.45

For the development of ideal gas law, the work of the scientist Robert Boyle which is known as the Boyle's Law was the most essential.

Ideal gas law can be stated as that the volume of the given amount of gas is directly proportional to the number of moles of a gas and the temperature as well as inversely proportional to the pressure. The law is given as:

PV = nRT

P= Pressure

V= Volume

n= Moles of the given gas

R= Ideal gas constant

T= Temperature

According to Boyle's law, the pressure of the given amount of gas is inversely proportional to its volume when the temperature is constant.

It is stated as:

P ∝ 1/V

Hence, option C is the correct option.
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Electron pairs around a central atom arrange themselves so that they can be as far apart as possible from each other. The repulsion between negatively charged electrons pairs in bonds or as lone pairs causes them to spread apart as much as possible

Explanation:

When constructing electron configurations for ions, we subtract electrons for a positive ion.

When an atom loses one or more electrons to form a positively charged ion, the resulting ion has fewer electrons than the neutral atom. This means that the electron configuration for the ion must be adjusted to reflect the change in the number of electrons.

To determine the electron configuration for a positive ion, we start with the electron configuration of the neutral atom and then remove electrons from the highest energy level first. For example, the electron configuration for a neutral sodium atom is 1s² 2s² 2p⁶ 3s¹. When sodium loses its valence electron to form a sodium ion (Na+), the resulting ion has the electron configuration of neon: 1s²2s² 2p⁶.

By subtracting one electron from the neutral sodium atom's electron configuration, we can see that the resulting ion has the same number of electrons as a neutral neon atom. This makes sense because both sodium and neon are in the same period of the periodic table and have the same number of electron shells.

The steps that should be considered while constructing electron configurations for ions are:-

1. Identify the element and its neutral electron configuration.
2. Determine the charge of the ion (positive or negative).
3. If the ion is positive, subtract the number of electrons equal to the charge from the neutral electron configuration.
4. If the ion is negative, add the number of electrons equal to the charge to the neutral electron configuration.
5. Write the new electron configuration for the ion.

Therefore, 'subtract' is the correct option.

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4.25 g Zn did react if 10.0 g of zn powder is added into a solution of silver nitrate, agno3. the total mass of the metallic solid recovered at the end of the reaction is 12.32 g.

So the equation I got what

Zn (s) + 2AgNO3 (aq) -> 2Ag (s) + Zn(NO3)2 (s)

I think the zinc nitrate is solid because the question asks about a metallic solid.

Then,

12.32 g X 1 mol/189.41 g Zn(NO3)2 = .065 mol Zn(NO3)2

Then to find the original Zn,

.065 mol X 1 mol Zn/1mol Zn(NO3)2 = .065 mol Zn

.065 mol Zn X 65.39 g/1 mol = 4.25 g Zn.

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Answer:

Ca2+ is cation

Explanation:

Because cation contain positive charge.

c. removing chloride ions

The reaction being referred to is the dissolution of solid silver chloride in water, which is represented by the equation:

AgCl(s) ⇌ Ag+(aq) + Cl-(aq)

The double arrow (⇌) indicates that this is a reversible reaction. At equilibrium, the concentration of the dissolved ions (Ag+ and Cl-) is constant and the solid silver chloride is in equilibrium with the dissolved ions.

To shift the reaction away from solid silver chloride and towards the dissolved ions, we need to apply Le Chatelier's principle, which states that a system at equilibrium will respond to any stress or change by shifting the equilibrium position in a way that reduces the effect of the stress.

a. Adding silver ions: If we add silver ions to the solution, the equilibrium will shift towards the left to reduce the concentration of silver ions. This means that more solid silver chloride will form, and the concentration of the dissolved ions will decrease.

Therefore, adding silver ions will shift the reaction away from the dissolved ions and towards the solid silver chloride.

b. Adding chloride ions: If we add chloride ions to the solution, the equilibrium will shift towards the right to consume the added ions. This means that more Ag+ ions will combine with Cl- ions to form solid silver chloride, and the concentration of the dissolved ions will decrease.

Therefore, adding chloride ions will also shift the reaction away from the dissolved ions and towards the solid silver chloride.

c. Removing chloride ions: If we remove chloride ions from the solution, the equilibrium will shift towards the left to replace the lost ions. This means that more solid silver chloride will dissolve to form Ag+ and Cl- ions, and the concentration of the dissolved ions will increase.

Therefore, removing chloride ions will shift the reaction towards the dissolved ions and away from the solid silver chloride.

d. Removing silver chloride: If we remove solid silver chloride from the solution, the equilibrium will shift towards the right to replace the lost solid. This means that more Ag+ and Cl- ions will combine to form solid silver chloride, and the concentration of the dissolved ions will decrease.

Therefore, removing silver chloride will also shift the reaction away from the dissolved ions and towards the solid silver chloride.

Therefore, the correct answer is option c: removing chloride ions will shift the equilibrium towards the dissolved ions and away from the solid silver chloride.

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