The decomposition of hydrogen peroxide, H2O2, has been used to provide thrust in the control jets of various space vehicles. Using the data in Appendix G, determine how much heat is produced by the decomposition of exactly 1 mole of H2O2 under standard conditions. 2H2 O2 (l) ⟶ 2H2 O(g) + O2 (g)

Answer:

Firms produce goods and services,which they sell to households in return for revenue.

Answer: Goods and Services

Explanation:

The change in temperature of the metal is 6.1°C. Details about change in temperature can be found below.

The change in temperature of a substance can be calculated by subtracting the initial temperature of the substance from the final temperature.

According to this question, a 25.0 g sample of metal at 16.0 °C is warmed to 22.1 °C by 259J of energy.

This means that the change in temperature of the metal can be calculated as:

∆T = 22.1°C - 16°C

∆T = 6.1°C

Therefore, the change in temperature of the metal is 6.1°C.

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Answer: 6.1°C.

Explanation: just for some extra verification, the answer is indeed 6.1°C. Hope this helps and have a great day!

Sodium is highly electropositive thus it can easily give out one electron from the outermost shell of the atom of the element.

We know that sodium is an element that has been found to be a member of group one of the periodic table. This implies that the sodium has only one electron in the outermost shell of the atom. As such, the sodium atom is quite very reactive and we observe that the sodium atom does loose electron easily.

The elements that are in the first group of the periodic table are highly electropositive and  this is what informs the fact they have a tendency to loose electrons quickly.

When the sodium atom looses an electron, it forms a univalent positive ion and there is a loss of an entire shell and this is why we find out that sodium does not occur in a free sate in nature owing to the fact that it tends to react very much.

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The metal cationic (+) atom to nonmetal anionic (-) atom ratio in the compound formed between Potassium and Chlorine is 1:1.

A compound is made up of two or more atoms that are chemically combined together. In this case, we have the atoms; Potassium and Chlorine.

The electronic configuration of the atoms is not shown here but the metal cationic (+) atom to nonmetal anionic (-) atom ratio in the compound formed between Potassium and Chlorine is 1:1.

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Answer:

20

Explanation:

Hi there!

We need to find the atomic number of an atom that has 20 protons and 20 neutrons

the atomic number of an atom is equivalent to the amount of protons an atom has, as the number of protons determines what element an atom is.

Since the atom has 20 protons, the atomic number of the said atom is 20

Hope this helps!  

The pink substance different from the green substance because the pink solution is thought to have a lesser intermolecular force than the green solution, which causes molecules to disperse as a result.

Consider the attraction between the molecules of the pink substance to be weaker than that of the molecules of the green substance. Each of its molecules separates from the others. It's important to take into account the following data:

In comparison to the green substance, the attraction between the molecules in the pink substance is thought to be less. It moves apart from one another and changes from liquid to gas.

So, we can say that the pink solution is thought to have a less intermolecular force than the green solution, which leads to the dispersion of molecules.

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Using Bohr's equation for the energy levels of the electron in the Hydrogen atom, determine the energy in J of an electron in the n=4 level.

According to Boh'rs equation we can calculate the energy using this equation:

En = - 2.18 * 10⁻¹⁸ J / (n²)

So if we want to find the energy we only have to replace n by 4 and solve that calculation:

since n = 4

En = - 2.18 * 10⁻¹⁸ J / 4²

En = - 2.18 * 10⁻¹⁸ J / 16

En = -1.36 * 10⁻¹⁹ J

So the answer is option D

Answer:

Copper (II) acetate, which is also referred to as cupric acetate

Explanation:

Noble gas configuration for Li : [He]2s¹

In an atom, there are levels of energy in the shell and sub-shell

This energy level is expressed in the form of electron configurations.

Lithium with atomic number 3, then the electron configuration:

1s²2s¹

And for noble gas configuration or it can be called Condensed electron configurations :

[He]2s¹

Answer:

[He]2s¹

Explanation:

Because of our belief in the law of conservation of mass, it seems reasonable that matter cannot be created or destroyed, only changed in form or transferred from one substance to another.

This law is fundamental to our understanding of the physical world, and it has many practical applications in fields like chemistry, physics, and engineering. It helps us to predict the outcomes of chemical reactions, to balance equations, and to understand the behavior of materials under different conditions.

The law of conservation of mass is a fundamental principle that underlies much of what we know about the world around us, and it will continue to play an important role in scientific research and development for years to come.

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The correct answer is option D.

The statement that formed the basis of Dalton’s atomic theory is atoms are the smallest particles of matter and cannot be divided farther.

In 1808, Dalton presented a theory named atomic theory which suggests that atoms are the smallest particles of an element and it is impossible to divide them further.

According to his theory every element is composed of these tiny particles.

Furthermore, his theory suggests that atoms neither can be divided nor destroyed.

In a particular matter, for example gold, all atoms have similar properties while their mass varies for every single different element.

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The complete question is:

Which of these statements is one of the conclusions that formed the basis of Dalton’s atomic theory?

a. Atoms can only change into atoms of another element through nuclear reactions.

b. Atoms of gases have less mass than atoms of liquids and solids.

c. Atoms of a particular element all have the same number of protons.

d. Atoms are the smallest particles of matter and cannot be divided farther.

Answer:

What do cuticles do for land plants that was not necessary for ancestors that lived in water? Cuticles help prevent water loss. ... The next groups of land plants to evolve were ferns, which could grow bigger and taller because they could transport water and food.

Explanation:

Because potatoes already contain sugar, less water will evaporate when they are submerged in sugar water. Because it will absorb water, the slice placed in water will become hard.

Answer:

-

Explanation:

Since potatoes already contain sugar, less water will diffuse out of the potato placed in sugar water. The slice placed in water will be rigid, since it will absorb water.

Answer:

Explanation:

what are the statments i can't help till i have the posable answers

Answer:

(i),(ii) and (iv)

Explanation:

Villi are finger-like outgrowths of the human intestine.

The main role of villi is to amplify surface area for rapid absorption of digested food. They have very tiny walls; the role of these walls is to pass digested nutrients through diffusion. These are directly connected to the blood vessels. Thus, the circulating blood can carry these nutrients away.

The correct answer is the first option.

Answer:

8. one ionizable hydrogen

9. Water-soluble organic acids, including dicarboxylic acids, such as malonic and glutaric acid,

Explanation:

8. A monoprotic acid is an acid that contains only one ionizable hydrogen. Hydrochloric acid and acetic acid are monoprotic acids. A polyprotic acid is an acid that contains multiple ionizable hydrogens

9. are a group of organic compounds often detected in atmospheric particles [Chebbi and Carlier, 1996; Kawamura and Kaplan, 1987; Saxena and Hildemann, 1996; Yang and Yu, 2008].

I hope this helps!  It was a bit hard to find

Answer:

Answer:

8. one ionizable hydrogen

9. Water-soluble organic acids, including dicarboxylic acids, such as malonic and glutaric acid,

Explanation:

8. A monoprotic acid is an acid that contains only one ionizable hydrogen. Hydrochloric acid and acetic acid are monoprotic acids. A polyprotic acid is an acid that contains multiple ionizable hydrogens

9. are a group of organic compounds often detected in atmospheric particles

Explanation:

none

Answer: 2.78

Explanation:

just counted the places and then did some math on the calculator

When 1 mole of hydrogen reacts with 1 mole of chlorine, 72.92 g of hydrogen chloride is formed. Option D is correct .

The balanced chemical equation for the reaction of hydrogen with chlorine to form hydrogen chloride is:

H2(g) + Cl2(g) → 2HCl(g)

According to the equation, one mole of hydrogen reacts with one mole of chlorine to produce two moles of hydrogen chloride. The molar mass of HCl is 36.48 g/mol, as given in the table.

To find the mass of HCl produced when 1 mole of H2 reacts with 1 mole of Cl2, we need to first find the number of moles of HCl produced. This can be done using stoichiometry:

1 mole of H2 reacts with 1 mole of Cl2 to produce 2 moles of HCl

Therefore, 1 mole of H2 reacts to produce 2 moles of HCl.

The mass of 2 moles of HCl is:

2 moles HCl x 36.48 g/mol = 72.92 g

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Explanation:

Technically, the ice cube melts because the water cools down. This may sound ridiculous at first, but you must consider the fact that the ice melts because it has drawn "heat" (energy) from its surroundings. The "surroundings" being the air and water that surround it (but the water's more important since it's a better conductor of thermal energy).

The surrounding air looses energy while the ice in the glass gains energy.

We know that thermal energy is transferred from a hotter body to a cooler body. If we look as the glass, we will notice that the surrounding air has a greater energy compared to the contents of the glass. The surrounding air looses this energy resulting in the condensation of water vapor in air around the glass.

Similarly, the ice in the glass gains energy and melts. A change of state occurs from solid to liquid as a result of the energy absorbed from the surrounding air.

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The produced at the anode in the electrolysis of molten CuF2 is A. F₂.

During electrolysis, CuF₂ will separate into Cu₂⁺ cations and F⁻anions. Cu₂⁺ will be reduced to copper metal, which will deposit on the cathode, whereas F⁻ anions will be oxidized to fluorine gas on the anode in the electrolysis of molten CuF₂. Hence, the answer is option A. Fluorine gas (F₂) is generated at the anode in the electrolysis of molten CuF₂.

Therefore, during the electrolysis of molten CuF₂, Cu₂⁺ is reduced to copper metal, which deposits on the cathode, and F⁻ anions are oxidized to fluorine gas on the anode, which is produced at the anode. The chemical reactions taking place during electrolysis of CuF₂ are given below: At the cathode, Cu₂⁺ cations get reduced to copper metal. Cu₂⁺ + 2e⁻ ⟶ Cu. At the anode, F⁻ anions get oxidized to fluorine gas. 2F⁻ ⟶ F₂ + 2e⁻. Therefore, option A is correct.

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please give brainliest

Answer:

Activation energy is the minimum amount of energy required for a chemical reaction to occur. It acts as a barrier that must be overcome for reactant molecules to transform into products. In other words, it is the energy input necessary to break the bonds of the reactant molecules and initiate the reaction.

The role of activation energy is crucial in determining the rate of a chemical reaction. Reactions with lower activation energy proceed more quickly because a higher proportion of reactant molecules have sufficient energy to overcome the activation barrier. On the other hand, reactions with higher activation energy have a slower rate since only a small fraction of reactant molecules possess the required energy.

An example of activation energy can be seen in the combustion of methane (CH4) in the presence of oxygen (O2) to form carbon dioxide (CO2) and water (H2O). This reaction requires an ignition source, such as a spark or flame, to supply the activation energy. Once the initial activation energy is provided, the reaction proceeds exothermically, releasing energy in the form of heat and light.

Without the activation energy, the reactant molecules would remain stable and the reaction would not occur spontaneously. Activation energy ensures that reactions proceed at appropriate rates and provides a control mechanism for chemical transformations.

(B)

Fusion reaction involves light nuclei and of all the elements listed, only the hydrogen isotopes can be considered light.

Chemical energy in the form of wood or charcoal is transformed into thermal energy (heat) through combustion.

The thermal energy is then transferred to the cooking vessel, heating the food inside and causing various chemical reactions to occur, such as denaturation of proteins and caramelization of sugars.

As the food cooks, the thermal energy is also transferred to the surrounding air, causing it to expand and rise, creating convection currents that help distribute the heat more evenly.

Some of the thermal energy is also lost to the environment through radiation and conduction, which can cause the cooking vessel and surrounding surfaces to become hot to the touch.

nergy is constantly being transformed and transferred in a variety of ways as food is cooked over a fire, resulting in the delicious meals we enjoy.

Heat of combustion used to explain the relative stability of the compounds.

The heat of combustion definition is the variation in energy released in the form of heat through the burning of an amount of any substance, all reactants being in the standard state (temperature of 25 C and pressure of 1 atm).

When the amount is quantified for 1 mole of said substance, one can define this quantity as the molar heat of combustion.

The molar heat of combustion values are defined in kilojoules per mole (KJ/mol). The kilojoule is a unit of energy and corresponds to 1000 or Joules (J). Mole is a unit of measurement used to express the amount of matter.

Now sugar is a non electrolyte so comparatively more stable hence more energy required to decompose the sugar hence its heat of combustion value is -5639kJ/mol high.

Where as TNT used as an explosive so it is susceptible for reaction and combustion, hence low amount of heat of combustionnis required for TNT that is -3406kJ/mol whuch is comparatively lower.

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Answer:

Gases consist of particles (molecules or atoms) that are in constant random motion. Gas particles are constantly colliding with each other and the walls of their container. These collisions are elastic; that is, there is no net loss of energy from the collisions.

Explanation:

hope it helps

Answer:

you multiply it by the other subscripts in the parenthesis.

Explanation:

Answer:

0.0178

Explanation:

because you can work out the amount of moles in KOH using moles = mass/mr.

The mr of the KOH is 39.1+16+1=56.1 so you do

\( \frac{3}{56.1} \)

which equals to 0.053475 so u 3SF which is 0.0535moles

than u uses the molar ratio which is 3 to 1

so 0.0535÷3=0.0178 which is the moles of FeCl3.

hope this make sense:)