Question 1 of 10
What happens when a solid becomes a liquid?

Answer:

it is the unit of Force

Explanation:

force is equal to Newton

The volume of water needed to prepare the solution given the data is 2.16 L

This is defined as the mole of solute per unit litre of solution. Mathematically, it can be expressed as:

Molarity = mole / Volume

Mole = mass / molar mass

Mole of CaCO₃ = 756 / 100.1

Mole of CaCO₃ = 7.55 moles

Volume = mole / molarity

Volume = 7.55 / 3.5

Volume = 2.16 L

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The synthesis of Ammonia occurs over a catalyst.

Ammonia (NH3) can be synthesized through the Haber-Bosch process, which is a large-scale industrial process used to produce ammonia from nitrogen gas (N2) and hydrogen gas (H2). The process is typically carried out at high pressure (150-450 atm) and high temperature (450-550°C) using an iron-based catalyst. The reaction can be represented by the following equation:

N2 + 3H2 -> 2NH3

In the Haber-Bosch process, nitrogen gas and hydrogen gas are compressed and mixed, then fed into a reactor where they are heated to the desired temperature and pressure. The reaction mixture is then passed over an iron-based catalyst.

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Answer:

t-value = 4.30

right side of the inequality: (4.30)(0.98/(s.r)3)

|12.16-11.98| = 0.18 > 2.43

conclusion: The difference is NOT statistically significant since the left side of the inequality is NOT greater than the right side

Answer:

2.282 atm

P1V1/T1 = P2V2/T2

2.70atm / (50+273) = X/ 273

make x subject of formula

:. X = 2.28 atm

or 2.28 * 1.01 *10⁵ N/m²

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The ionization of the following acids can be represented as:

Tetraoxosulphate (VI) Acid (\(H_{2}SO_{4}\)) ionizes as H+ and SO4^2- ions.

Trioxonitrate (V) Acid (\(HNO_{3}\)) ionizes as H+ and \(NO_{3-}\) ions.

Ethanoic Acid (\(CH_{3}COOH\)) ionizes as H+ and \(CH_{3}COO^{-}\) ions.

Tetraoxosulphate (VI) Acid, also known as sulfuric acid (\(H_{2}SO_{4}\)), ionizes as follows:

\(H_{2}SO_{4}\) → \(H+\) + \(SO_{4}^{2-}\)

In this reaction, sulfuric acid donates two hydrogen ions (H+) to the solution, forming sulfate ions (\(SO_{4}^{2-}\)).

Trioxonitrate (V) Acid, commonly known as nitric acid (\(HNO_{3}\)), ionizes as follows:

\(HNO_{3}\) → \(H+_{}\) + \(NO_{3-}\)

Nitric acid dissociates to release one hydrogen ion (\(H+\)) and a nitrate ion  (\(NO_{3-}\)).

Ethanoic Acid, also known as acetic acid (\(CH_{3}COOH\)), ionizes as follows:

\(CH_{3}COOH\) → H+ + \(CH_{3}COO^{-}\)

Acetic acid donates a hydrogen ion (H+) to the solution, forming an acetate ion (\(CH_{3}COO^{-}\)).

In all cases, the acids dissociate in water, producing hydrogen ions (H+) as positively charged ions and their corresponding anions. The hydrogen ions are responsible for the acidic properties of these substances, while the anions contribute to the overall charge balance in the solution. The ionization of acids allows them to conduct electricity in aqueous solutions and react with other substances.

The question was incomplete. find the full content below:

Indicate the ionization of the following acids,

Tetraoxosulphate (VI) Acid

Trioxonitrate (V) Acid

Ethanoic Acid.​

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Answer: Li^+ (g) ----> Li^2+ (g) + e^-

Considering the definition of first and second ionization energy, the second ionization energy of lithium is:

Li⁺ →  Li²⁺  +  1 e-

In first place, the electrons are attracted to the nucleus and it is necessary to provide energy to start them. Ionization energy is the energy required to remove an electron from a gaseous atom, isolated and in a ground state. The electrons in the last shell, which are the weakest attracted to the nucleus, are always lost. In this way the neutral atom becomes a gaseous cation (ion with a positive charge).

So, in this case, the first ionization energy of lithium is:

Li →  Li⁺  +  1 e-

The energy required to remove a second electron is called the second ionization energy and due to the difficulty of removing an electron from a positive particle, its value is greater than the first ionization energy (the volume of a positive ion is less than that of the neutral atom and the electrostatic force is greater in the positive ion than in the atom)

Finally, in this case, the second ionization energy of lithium is:

Li⁺ →  Li²⁺  +  1 e-

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The mass of the percent of the 10 g solute in the 105 g solvent is 8.69 %.

The mass of the solute = 10 g

The mass of the solvent = 105 g

The mass of the solution = 10 g + 105 g

The mass of the solution = 115 g

The mass of the percent is expressed as :

The mass of percent = ( mass of solute / mass of solution ) × 100 %

The mass of solute = 10 g

The mass of solution = 115 g

The mass of percent = ( 10 / 115 ) × 100 %

The mass of percent = 8.69 %

Thus, the mass of percent is 8.69 % and the mass of solute is 10 and the mass of the solution is 115 g.

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From the available choices, Heterogeneous combinations make up potting soil.

In heterogeneous blends, we can easily discern between the various components. The soil's components make up a heterogeneous mixture since they don't all have the same physical and chemical properties.

It's a great idea to grow indoor and potted plants in potting soil. It is typically more nutritious and well-balanced for the plants. The phrase "soil heterogeneity" refers to the diversity of soil traits or taxonomic groupings found in a certain area. Potting soil is a heterogeneous mixture since its composition is not homogeneous.

Tap water is uniform and impossible to identify salt particles without the proper equipment since salt virtually completely dissolves into it.

Chlorine gas (Cl) is a component of homogeneous compounds. Potassium and chlorine are a mixture because all of the components are heterogeneous, or separate.

Table salt is a homogeneous mixture. It contains several ingredients, hence it is not a compound.

The only heterogeneous substance would be potting soil since, without the use of specialist equipment, we can see a variety of particles with different sizes, forms, colors, and other properties.

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When a cylinder is filled to a volume of 3.50 L at 760 mmHg with chlorine gas. The volume of the gas if the pressure is changed to 50.0 kPa is 7.0924 L.

Boyle's law is generally a gas law which states that "a gas's pressure and volume are inversely proportional when the temperature is kept constant, as volume increases, pressure falls and vice versa".

Mathematically,

P₁V₁ = P₂V₂

P₁ = 760 mmHg = 101.32 kPa

V₁ = 3.50 L

P₂ = 50 kPa

V₂ = ?

Substituting the values we get,

101.32 × 3.50 = 50 × V₂

⇒ V₂ = (101.32 × 3.50)/50

⇒ V₂ = 7.0924 L

Hence, the volume of the gas if the pressure is changed to 50.0 kPa is 7.0924 L.

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The correct order of the particles that give texture to the soil from smallest to largest is clay, silt, and sand; option C.

Soil texture refers to a physical classification of the component and types of soils based on their physical texture either as coarse or fine particles.

There are several types of soils and these various types of soils have different textures.

The types of soils and their arrangement based on increasing particle size are as follows:

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Answer:

I don't know What can I do.

Answer:

11.3%

Explanation:

The stock market’s average annual return through history is 11.3%, which is more than most savings accounts pay.

Convert temperatures to Kelvin

\(\\ \sf\longmapsto 50+273=323K\)

\(\\ \sf\longmapsto 30+273=303K\)

Using Charles law

\(\\ \sf\longmapsto \dfrac{V_1}{T_1}=\dfrac{V_2}{T_2}\)

\(\\ \sf\longmapsto \dfrac{15}{323}=\dfrac{V_2}{303}\)

\(\\ \sf\longmapsto V_2=\dfrac{15(303)}{323}\)

\(\\ \sf\longmapsto V_2=\dfrac{4545}{323}\)

\(\\ \sf\longmapsto V_2=14.07L\)

Answer:

Height and mass

Explanation:

The potential energy of a body is the energy due to the position of a body.

It is mathematically expressed as:

 Potential energy  = m g h

m is the mass of the body

g is the acceleration due to gravity

h is the height of the body

Acceleration due to gravity on the earth surface is a constant.

As mass and height of a body increases, the acceleration due to gravity will also increase.

Answer:

Astronomers identify numerous types of dwarf galaxies based on their shape and composition.

Explanation:

Answer:

A. prefixed with the letter "d"

Explanation:

Options b) and d) are correct . In these two cases equilibrium constant is greater than 1.

What hard and soft acids?

Hard acid means which are Small, highly charged (the charge criterion mostly applies to acids, to a lesser extent to bases), and poorly polarizable. Soft applies to species which are big ,have low charge states and are strongly polarizable.

a)  In case of first reaction BF3 is harder acid than BBr3 , so K<1

b) HOC(CH3)3 is harder acid ,so K>1

c) reaction will shift towards reactants side ,so K<1

d) Reaction will shift towards right ,so K>1

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There are 2.223 moles of ions contained in 1.27 L of a 1.75 M solution of Mg(NO3)2.

No. of moles = molarity × volume

no. of moles = 1.75M × 1.27L

no. of moles = 2.223mol

Therefore, there are 2.223 moles of ions contained in 1.27 L of a 1.75 M solution of Mg(NO3)2.

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Answer:bromine , neon , helium , argon , lithium , beryllium

Explanation:

Elements can be divided into three state that are solid, liquid and gas depending the intermolecular forces of attraction, distance between the particles etc. Lithium, beryllium, boron, carbon, sodium, magnesium, iron, copper, etc. are solid at room temperature.

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.

Two or more than two atoms with different physical or chemical properties can not combine together to form an element. Elements can be solid liquid or gas at room temperature.

Therefore,  Lithium, beryllium, boron, carbon, sodium, magnesium, iron, copper, etc. are solid at room temperature.

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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 specific gravity of the liquid is 1.125.

The specific gravity of a substance is the ratio of its density to the density of water at a particular temperature.

Therefore, we need to calculate the density of the liquid and compare it to the density of water at the same temperature.

The formula for density is:

density = mass/volume

density of the liquid = 45.0 g / 40.0 mL = 1.125 g/mL

At 4 °C, the density of water is 1.000 g/mL.

Therefore, the specific gravity of the liquid is:

specific gravity = density of liquid / density of water = 1.125 g/mL / 1.000 g/mL = 1.125

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We need to convert 1.2x10^21 formula units of magnesium hydroxide to grams

First, we must use that

Using that, we can calculate the number of moles of magnesium hydroxide

Then, using that the molar mass of magnesium hydroxide is 58 g/mol we can calculate the grams

Finally, 1.2x10^21 formula units of magnesium hydroxide are 0.115 grams

ANSWER:

0.115

The answer responses to  the structures shown in the diagram are:

A. chromosomes

C. They would be the same.

B. They are in pairs because each one comes from a different parent.

The chromosomes are in pairs because humans have a diploid number of chromosomes, meaning they have two sets of chromosomes, one inherited from each parent.

The nucleus is important in eukaryotic cells and has many important parts that help the cell work properly. There are some parts inside cells called the nuclear membrane, nucleoplasm, nucleolus, and chromatin. Chromatin is made up of DNA and other proteins.

Every part of a person's body has the same genes, but the way they are organized can be different in different types of cells. The chromosomes in our skin cells might not be the same as the chromosomes in our muscle cells, even if they come from the same person.

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Identify the structures shown.

A. chromosomes

B. mitochondria

C. nuclei

D. vacuoles

C

Describe how the structures from this cell would compare to the structures in the nucleus of another body cell from the same person.

A. There would be longer.

B. They would be shorter.

C. They would be the same.

D. They would be different.

Describe how the structures from this cell would compare to the structures in the nucleus of another body cell from the same person.

A. There would be longer.

B. They would be shorter.

C. They would be the same.

D. They would be different.

Explain why the structures are in pairs.

A. They aren't in pairs.

B. They are in pairs because each one comes from a different parent.

C. This cell is making a copy of itself.

D. The cell always has 2 copies in case 1 is damaged.

Answer:

B)11

Explanation:

The atomic number is the number of protons and electrons in an atom!!

HOPE THIS HELPS!!!!!!

Answer:

H2SO4(acid), NaOH(base)

Explanation:

Answer:

This should help :)

Explanation:

The cart has a lot of potential energy, little kinetic energy, and little thermal energy when it is in position A. The kinetic energy and potential energy both rise as the cart moves towards position B, while the thermal energy rises as thermal energy from the track is transmitted to the cart through friction

Kinetic energy, which may be seen in the movement of an object, particle, or group of particles, is the energy of motion.

The cart has a lot of kinetic energy, little potential energy, and little thermal energy after it reaches position C. The cart has some thermal energy and a high potential energy at point D.

It also has a low kinetic energy. Gravity, momentum, and friction are all connected with potential energy, kinetic energy, and thermal energy, respectively.

Position A is when the potential energy is at its highest, and its kinetic energy is at its peak in position C and at its lowest in position A, whereas thermal energy is at its peak in position B and at its lowest in position A.

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Answer:

Explanation: