Write a balanced chemical equation depicting the formation of one mole of h2o2(g) from its elements in their standard states. express your answer as a chemical equation. identify all of the phases in your answer.

The best description of a gaseous substance among the given options is It has no definite shape or volume, and will expand indefinitely. The correct option is an option (c).

Gaseous substances do not have a definite shape or volume. They take shape and fill the entire space of the container they are in. They can expand indefinitely to occupy any available space. This description accurately represents the characteristics of a gaseous substance.

Therefore, It has no definite shape or volume and will expand indefinitely. The correct option is an option (c).

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The complete question is:

Which of the following is the best description of a gaseous substance?

It has no shape of its own but has a definite volume.

It has no definite shape or volume and will expand indefinitely.

It holds its shape without outside restraint.

It is the result of a chemical reaction involving two or more elements.

Final answer:

A gaseous substance is best described as having no definite shape or volume, expanding to fill the volume of any container it is in.

Explanation:

The best description of a gaseous substance is that it has no definite shape or volume, and will expand indefinitely to fill any container. Unlike solids that hold their shape without outside restraint, and liquids that have a definite volume but take the shape of their container, gases are characterized by particles that move about randomly in space with enough energy to completely overcome intermolecular interactions. This significant characteristic delineates a gas from other phases of matter, as it occupies the entire space available, regardless of the size of the container.

Answer:

Platinum is used as a catalytic converter

Explanation:

At present, internal combustion vehicles are equipped with an element called catalytic converter, which is one of the most important components for the control of emissions of polluting gases resulting from combustion produced by engines. Its main function is to transform the polluting gases resulting from the burning of fuel into other gases that are more environmentally friendly. This element is located under the vehicle along the exhaust system pipe after the oxygen sensor.

There are different types of catalytic converters, but modern vehicles are equipped with three-way catalytic converters, referring to the three kinds of pollutant gases that must be reduced (CO, HC and NOX). The converter uses two types of catalysts, one of reduction and another of oxidation. Both consist of a ceramic structure covered with normally platinum, rhodium and palladium metal. The main idea was to create a structure that exposes the catalyst surface to the maximum against the flow of exhaust gases, also minimizing the amount of catalyst required since it is very expensive.

Answer: The mass of sucrose is 34.23 g

Explanation:

Molarity is defined as the number of moles present in one liter of solution.

Mathematically,

[tex]\text{Molarity of the solution}=\frac{\text{Moles of solute}}{\text{Volume of solution (in L)}}[/tex]

Or,

[tex]\text{Molarity of the solution}=\frac{\text{Mass of solute}\times 1000}{\text{Molar mass of solute}\times \text{Volume of solution (in mL)}}[/tex]

We are given:

Molarity of solution = 0.200 M

Molar mass of sucrose = 342.3 g/mol

Volume of solution = 500 mL

Mass of sucrose = ? g

Putting values in above equation, we get:

[tex]0.200mol/L=\frac{\text{Mass of sucrose}\times 1000}{342.3g/mol\times 500mL}\\\\\text{Mass of sucrose}=34.23g[/tex]

Hence, the mass of sucrose is 34.23 g

The metals are defined as those substances which can form metallic bonds. Iron, copper, etc. are metals. Because electrons move freely in metals, metals are conductors of heat and electricity.

The metals are known as those substances which can donate electrons. They are electropositive in nature. An opaque, hard, shiny substances which can conduct heat and electricity due to the presence of free electrons are metals. All metals are malleable and ductile.

The metals contain one or two valence electrons. In order to attain stability they transfer the electrons. When these valence electrons are transferred rapidly to form a compound, there is a continuous flow of electrons in the lattice of compound.

Thus free electrons in metals are obtained due to their ability to transfer valence electrons and to achieve electrical neutrality.

Thus metals are conductors of heat and electricity.

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B. help to distribute this energy by warming other regions of the globe.

Welcome.

Areas near the equator receive the greatest amount of energy from the Sun because Ocean currents help in distributing this energy by warming up other regions of the globe. Thus, the correct option is B.

Ocean currents including the ocean conveyor belt play an important role in the determination of how the ocean distributes heat energy throughout the planet Earth, thereby regulating and stabilizing the climate patterns in different regions of the planet.

Warm current moves away from the equator towards the poles whereas the cold currents concurrently move towards the equator. This process of movement of current waves is known as thermohaline circulation. The cold currents due to their higher density move in the great depth of the oceans while the warmer currents are on the surface due to their relatively lower density.

Therefore, the correct option is B.

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Answer : The amount of heat released is, -1602.36 KJ

Explanation : Given,

Moles of NaOH = 3.600 mole

Molar heat of solution of NaOH = -445.1 KJ/mole

Now we have to calculate the amount of heat released.

As, 1 mole of NaOH is dissolved in water then heat released = - 445.1 KJ

So, 3.600 mole of NaOH is dissolved in water then heat released = [tex]-445.1\times 3.600=-1602.36KJ[/tex]

Therefore, the amount of heat released is, -1602.36 KJ

Answer:

bases

Explanation:

Answer:

68 grams is the maximum amount of KCl that can be dissolve in 200 g of water.

Explanation:

Let the maximum amount of KCl dissolved in water be x

Solubility of KCl in water = 34g /100 g

This means that  34 g of KCl can be dissolved in 100 g of water at 20°C

Maximum amount of KCl dissolved in  1 g of water = [tex]\frac{34}{100} g[/tex]

Maximum amount of KCl dessolbved in 200 g of water :

[tex]\frac{34}{100}\times 200=68 g[/tex]

68 grams is the maximum amount of KCl that can be dissolve in 200 g of water.

When a strong acid is added to a buffer containing ammonia and ammonium chloride, the ammonia reacts with the acid, neutralizing it and creating ammonium. The remaining ammonium chloride then contributes additional ammonia to maintain the buffer's pH.

The buffer contains both ammonia and ammonium chloride, which represent a weak base and its conjugate acid respectively. When a strong acid like HI is added to the buffer, the following reaction occurs NH3 (ammonia) + HI -> NH4+ (ammonium) + I-. In this reaction, the base component of the buffer (ammonia) reacts with the added acid (HI), neutralizing it and producing its conjugate acid (ammonium). The remaining ammonium chloride in the buffer then helps maintain the pH by releasing more ammonia into the solution.

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In a buffer containing ammonia and ammonium chloride, the ammonia molecules react with hydronium ions from the added acid to form ammonium ions and water, neutralizing the acid.

A buffer is a solution that resists dramatic changes in pH and is composed of pairs of solutes, such as a weak acid and a salt derived from that weak acid, or a weak base and a salt of that weak base. In this case, the buffer contains ammonia and ammonium chloride. When an acid, such as HI, is added to the buffer, the ammonia molecules react with the hydronium ions (H3O+) to form ammonium ions (NH4+) and water, effectively neutralizing the added acid.

The equation for this reaction is:

H3O+ (aq) + NH3(aq) → NH4+ (aq)+ H2O(1)

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Answer:

It is known that metals are malleable and ductile

so your answer would be metal

Explanation:

It is known that metals are malleable and ductile. Whereas non-metals are neither malleable nor ductile. On the other hand, metalloids are the elements which contain properties similar to both metals and non-metals.

The reaction that results in the greatest increase in entropy is [tex]\rm A \rightarrow 2B[/tex]. The correct answer is option A.

Entropy is a measure of the disorder or randomness of a system. The greater the number of particles in a system, the greater the entropy. A reaction that produces more particles will result in an increase in entropy.

Therefore, option A. [tex]\rm A \rightarrow 2B[/tex] results in the greatest increase in entropy because it produces more particles, which results in a greater degree of disorder or randomness and a higher entropy.

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The molecular mass of Carbon monoxide (CO) is 28.01 g/mol, which is the sum of the atomic mass of carbon (12.01 g/mol) and oxygen (16.00 g/mol).

The question is asking to calculate the molecular mass of Carbon monoxide (CO). To find the molecular mass, you need to add the atomic mass of carbon (C) and the atomic mass of oxygen (O).

Using the standard atomic weights for these elements, carbon has an atomic mass of approximately 12.01 g/mol and oxygen has an atomic mass of about 16.00 g/mol.

So, the molecular mass of CO would be:
12.01 g/mol (Carbon) + 16.00 g/mol (Oxygen) = 28.01 g/mol (Carbon monoxide)

Answer:

Fluorine would likely have the highest electronegativity value.

Explanation:

The shells of snails is an example of calcium carbonate. option C is correct.

The shells are made up of calcium carbonate (CaCO3) compounds to protect the eggs or the embryo inside the egg or the soft body of the organism. the main purpose is to protect the body inside the shell from the harsh environment which can damage the body.

The eggshell of snail shell can be used as fillers in the polymer industries and it is the main source of calcium carbonate by crushing the shells we obtain it in powder form it is much rich in calcium.

The main function of the shell is to protect the body inside from the outer environment and for the growth of the body.

Therefore, the shells of snails are an example of calcium carbonate. option C is correct.

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