How do ionic bonds affect the properties of ionic compounds?
The bonds weakly hold ions together, increasing the melting point.
The bonds strongly hold ions together, reducing the boiling point.
The bonds prevent ions from moving throughout the crystal, so a solid ionic compound is a poor conductor.
The bonds prevent electrons from moving throughout the crystal, so a solid ionic compound is a poor conductor.

There can be release of radiations like gamma radiation. There can be emission of particles too like alpha particle. Therefore, the given nuclear decay reaction is balanced.

It is process in which the radioactive element releases particles or radiations. Alpha particles is ⁴₂He. Alpha particle is nothing but helium particle.

So, according to our questions Uranium-238 is undergoing alpha emission. The balanced reaction can be written as

²³⁸U₉₂ ²³⁴ \(\rightarrow\)Th₉₀+⁴₂He

So, From above reaction we can see that the total mass on reactant side is equal to total mass on product side. So, this reaction is balanced.

Therefore, the given nuclear decay reaction is balanced.

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Answer:

Answer is A.

Explanation:

I hope it's helpful!

Answer:

a because it comes 20 to 100c

The right answer is capillaries that metabolites like salts and food molecules are exchanged in capillaries together with waste products, oxygen, and carbon dioxide.

In the capillaries, waste, nutrients, and gases are delivered from the blood to the tissue.  Little blood arteries called capillaries create networks surrounding body cells by branching off from arterioles.

It is supplied to the blood during gas exchange from the lungs. Both the lungs and blood exchange carbon dioxide at the same time. The capillaries, a network of tiny blood veins found in the walls of the alveoli, are where this occurs in the lungs in between the individual alveoli.

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Answer:

A mixture!

Explanation:

Mixtures are a substance made of combining two or more different kinds of matter :)

Hope this helped!

When two equal forces act in opposite directions the result is that the forces are balanced and there is no motion. The process of moving or changing position. When one force is stronger than the other the result is motion.

An force results when one force is stronger than other forces and the motion of an object is affected is unbalanced force.

A force is an influence in physics that can change the motion of an object. A force can cause a mass object to change its velocity, or accelerate.

The forces are balanced if the people on each side of the rope pull with equal strength but in opposite directions.

As a result, there is no movement. Forces that are in balance can cancel each other out. The object does not move when there is a balanced force.

Forces out of balance, If one force is stronger than the others and their effects do not cancel out, the forces are unbalanced. Unbalanced forces alter motion, speed, and/or direction. A greater force results in a greater change in motion.

Thus, the answer is unbalanced force.

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To graph the function g(x) = f(-x), you can start with the graph of f(x) and then reflect it about the y-axis.

To find the graph of the function g(x) = f(-x), we can start with the graph of the function f(x) and then reflect it about the y-axis.

If the graph of f(x) is symmetric with respect to the y-axis, meaning it is unchanged when reflected, then g(x) = f(-x) will have the same graph as f(x).

However, if the graph of f(x) is not symmetric with respect to the y-axis, then g(x) = f(-x) will be a reflection of f(x) about the y-axis.

In either case, the resulting graph of g(x) = f(-x) will be symmetric with respect to the y-axis.

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The factors that affect the rate of solution formation are capable of either increasing the rate of solution formation or decreasing it.

The rate of solution formation from a chemical reaction depends on the following factors:

Therefore, the factors that affect the rate of solution formation are capable of either increasing the rate of solution formation or decreasing it.

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Answer:

Pb(NO3)2

Cd(NO3)2

Na2SO4

Explanation:

In the first part, addition of HCl leads to the formation of PbCl2 which is poorly soluble in water. This is the first precipitate that is filtered off.

When the pH is adjusted to 1 and H2S is bubbled in, CdS is formed. This is the second precipitate that is filtered off.

After this precipitate has been filtered off and the pH is adjusted to 8, addition of H2S and (NH4)2HPO4 does not lead to the formation of any other precipitate.

The yellow flame colour indicates the presence of Na^+ which must come from the presence of Na2SO4.

Answer:

True. Hope this helps. :)

Answer:

A duckling swimming after its own mother

Explanation:

At equilibrium, the number of moles of \(Cl_2\) (g) will be 0.2025 mol.

1: Write the balanced chemical equation:

\(C_O\)(g) + \(Cl_2\)(g) ⟶ \(C_OCl_2\)(g)

2: Set up an ICE table to track the changes in moles of the substances involved in the reaction.

Initial:

\(C_O\)(g) = 0.3500 mol

\(Cl_2\)(g) = 0.05500 mol

\(C_OCl_2\)(g) = 0 mol

Change:

\(C_O\)(g) = -x

\(Cl_2\)(g) = -x

\(C_OCl_2\)(g) = +x

Equilibrium:

\(C_O\)(g) = 0.3500 - x mol

\(Cl_2\)(g) = 0.05500 - x mol

\(C_OCl_2\)(g) = x mol

3: Write the expression for the equilibrium constant (Kc) using the concentrations of the species involved:

Kc = [\(C_OCl_2\)(g)] / [\(C_O\)(g)] * [\(Cl_2\)(g)]

4: Substitute the given equilibrium constant (Kc) value into the expression:

1.2 x \(10^3\) = x / (0.3500 - x) * (0.05500 - x)

5: Solve the equation for x. Rearrange the equation to obtain a quadratic equation:

1.2 x \(10^3\) * (0.3500 - x) * (0.05500 - x) = x

6: Simplify and solve the quadratic equation. This can be done by multiplying out the terms, rearranging the equation to standard quadratic form, and then using the quadratic formula.

7: After solving the quadratic equation, you will find two possible values for x. However, since the number of moles cannot be negative, we discard the negative solution.

8: The positive value of x represents the number of moles of \(Cl_2\)(g) at equilibrium. Substitute the value of x into the expression for \(Cl_2\)(g):

\(Cl_2\)(g) = 0.05500 - x

9: Calculate the value of \(Cl_2\)(g) at equilibrium:

\(Cl_2\)(g) = 0.05500 - x

\(Cl_2\)(g) = 0.05500 - (positive value of x)

10: Calculate the final value of \(Cl_2\) (g) at equilibrium to get the answer.

Therefore, at equilibrium, the number of moles of \(Cl_2\) (g) will be 0.2025 mol.

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The pOH of the 0.001 M NaOH solution is approximately 3.

To determine the pOH of a solution, we need to know the concentration of hydroxide ions (OH-) in the solution.

In the case of a 0.001 M NaOH solution, we can assume that all of the NaOH dissociates completely in water to form Na+ and OH- ions. Therefore, the concentration of hydroxide ions in the solution is also 0.001 M.

The pOH is calculated using the equation:

pOH = -log[OH-]

Substituting the concentration of hydroxide ions, we have:

pOH = -log(0.001)

Using a calculator, we can evaluate the logarithm:

pOH ≈ 3

Therefore, the pOH of the 0.001 M NaOH solution is approximately 3.

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4.78 x 10^22 formula units of Ca(NO3)2 contain 79.6 millimoles of Ca(NO3)2.

Chemists use the mole, a very significant unit of measurement. Ones have 602,214,076,000,000,000,000,000 of something if you have a mole of it. For extremely small objects such as atom, molecule, or other particles, chemists must quantify using moles. The SI measure of substance amount is the mole, denoted by the symbol mol.

Number of moles of Ca(NO3)2 = (4.78 x 10^22 formula units) / (6.022 x 10^23 formula units/mol)

= 0.0796 moles

Now, we can convert moles to millimoles by multiplying by 1000

Number of millimoles of Ca(NO3)2 = (0.0796 moles) x (1000 mmol/mol)

= 79.6 mmol

Therefore, 4.78 x 10^22 formula units of Ca(NO3)2 contain 79.6 millimoles of Ca(NO3)2.

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The temperature of the gas when the volume increase from 0.67 L to 1.37 L is  471.29 °C.

Temperature is the hotness or coldness of a thing or place.

To calculate the temperature in Celsius when the volume increase, we use the formula below.

Formula:

Where:

From the questuion,

Given:

Substitute these values into equation 1

Hence, the final temperature of the gas is 471.29 °C.

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Answer:

Oxido nitrate

Explanation:

True

Answer:

oxido nitrate

Explanation:

hope it helps

The structural formula which represents a nonpolar symmetrical molecule is CH₄ (methane). Option 2 is correct.

Methane is a tetrahedral molecule with four hydrogen atoms surrounding a central carbon atom. Each hydrogen atom is bonded to the carbon atom by a single covalent bond, and all four hydrogen atoms are arranged symmetrically around the carbon atom, resulting in a nonpolar molecule.

On the other hand, NH₄ (ammonium ion) and H₂O (water) are polar molecules. NH₄ has a positive charge on the nitrogen atom, and the hydrogen atoms are arranged tetrahedrally around it, making it a polar molecule. H₂O has a bent or V-shaped molecular geometry with two lone pairs of electrons on the oxygen atom, resulting in an uneven distribution of charge and making it a polar molecule as well.

Hence, 2. is the correct option.

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Answer:

4. KCl(s)

Explanation:

KCl is an ionic salt that dissolves in water to form a KCl aqueous solution.

A solution is defined as the homogeneous mixture of one or more solutes dissolved in a solvent. Here in the saturated solution of potassium chloride, the solute is KCl. The correct option is 4.

A solute is defined as the substance which is dissolved in a solution. In a solution the amount of the solute present is always smaller than the amount of the solvent. For example in a salt solution, salt dissolves in water and therefore salt is the solute.

The particles of the solute present in a solution cannot be seen by our eye. The solute from a solution is not possible to separate by filtration. In an unsaturated solution, the concentration of the solute is much lower than that of the concentration of the solvent.

A solution is a combination of the solute and the solvent.

Thus the correct option is 4 - KCl.

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The choice of solution has a concentration of 1.144 mol/kg molality.

Molarity corresponds to the moles of solvent divided by the amount of solution in litres, whereas molality is equal with the moles of solvent divided by the quantity of solvent in kilogrammes.

Since 1 mole of solute is present in 1 litre for the solution, which contains both the solute and the solvent, 1 molar aqueous solutions are more concentrated than one decays aqueous solutions.

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Answer:

Wash hands and surfaces often. Harmful bacteria can spread throughout the kitchen and get onto cutting boards, utensils, and counter tops. To prevent this: Wash hands with soap and hot water before and after handling food, and after using the bathroom, changing diapers; or handling pets.

Answer:

Its B)

Explanation:

i got it right

Aluminium is 13th element, containing 13 electrons and 13 protons. Thus the Al atomic nucleus has a charge of +13 and it is surrounded by 13 electrons.

Aluminium is 13th element in periodic table. It is placed in 13th groups and it is a metal. Aluminium is an electropositive element and it conducts so that it is considered as a metal.

The nucleus of every element is composed of neutrons and protons. Neutrons are neutral and protons are positively charged particles. Electrons are negatively charged particles  revolving  around the nucleus.

The number of protons in an atom is called its atomic number.  Hence, the nucleus of a aluminium contains 13 protons thus having +13  charge and equal number of electrons revolving around.  Hence, option B is correct.

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The buffer solution has a pH of 5.36.

To find the pH of this buffer solution, use the Henderson-Hasselbalch equation:

pH = pKa + log([A⁻]/[HA])

where pKa = dissociation constant of acetic acid, [A⁻] = concentration of acetate ions, and [HA] = concentration of acetic acid.

Calculate the concentrations of acetate ions and acetic acid in the solution.

The initial moles of acetic acid are:

moles of acetic acid = volume of acetic acid x concentration of acetic acid

moles of acetic acid = 0.020 L x 0.10 mol/L

moles of acetic acid = 0.002 mol

After mixing with sodium acetate, the total volume of the solution is 50 mL, so the concentration of acetic acid and acetate ions are:

[HA] = moles of acetic acid / total volume of solution

[HA] = 0.002 mol / 0.050 L

[HA] = 0.040 M

[A⁻] = concentration of sodium acetate

[A⁻] = 0.10 M

The dissociation constant of acetic acid is pKa = 4.76.

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

pH = pKa + log([A⁻]/[HA])

pH = 4.76 + log(0.10/0.040)

pH = 4.76 + 0.60

pH = 5.36

Therefore, the pH of the buffer solution is 5.36.

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Considering the ideal gas law, the volume occupied by 3.25 moles of an ideal gas at a temperature of 18.00°C is 686.71 L.

An ideal gas is the behavior of those gases whose molecules do not interact with each other and move randomly. Under normal conditions and under standard conditions, most gases exhibit ideal gas behavior.

An ideal gas is characterized by three state variables: absolute pressure (P), volume (V), and absolute temperature (T), related by a simple formula called the ideal gas law:

P×V = n×R×T

Where:

In this case, you know:

Replacing in the ideal gas law:

1.13 atm×V = 3.25 mol× 0.8205 L.atm/K.mol× 291 K

Solving:

V = (3.25 mol× 0.8205 L.atm/K.mol× 291 K)÷ 1.13 atm

V= 686.71 L

Finally, the volume is 686.71 L.

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Answer:

They are considered nonrenewable because they are prehistoric animals that has been extinct therefore can't be renew.

Hope this answer helps you

The density of a substance (in g/dL) of a sample with a mass of 8.3 x 10-¹ dag and a volume of 4.10 mL is 202.44g/dL.

The density of a substance is the measure of the mass of matter contained by a unit volume.

The density of a substance can be calculated by dividing the mass of the substance by its volume.

According to this question, a substance with a mass of 8.3 x 10-¹ dag has a volume of 4.10 mL. The density can be calculated as follows:

Density = 8.3g ÷ 0.041dL

Density = 202.44g/dL

Therefore, the density of a substance (in g/dL) of a sample with a mass of 8.3 x 10-¹ dag and a volume of 4.10 mL is 202.44g/dL.

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I think u asked for the atoms of sulfur? its 4..

Explanation:

calcium = 4

sulfur = 4

oxygen = 4

I hope this is correct

Antonio dissolved salt and sugar in a large beaker with distilled water to form a solution. Solutions can have many solutes, but only one solvent. In this mixture, salt and sugar are solutes, and water is the solvent.

A solution is a homogenous mixture, that is, it has 2 or more components.

The component in the greatest proportion is known as the solvent, while the other/s are known as the solutes.

Antonio dissolves salt and sugar in a large beaker with distilled water.

Has Antonio created a solution or a mixture?

Antonio dissolved salt and sugar in a large beaker with distilled water to form a solution. Solutions can have many solutes, but only one solvent. In this mixture, salt and sugar are solutes, and water is the solvent.

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Answer:

b

Explanation: