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Exothermic reaction

Energy diagrams can help us determine how the energy of reactants changes throughout a reaction.

Energy Diagrams

The purpose of energy diagrams is to show how the energy of reactants and products changes over time.

In the diagram, A is the activated complex. This is the intermediate compound that forms from the reactants before the products are made.

B is the activation energy. This is the amount of energy required for the reaction to occur.

C is the energy of reaction. This is the energy that a reaction absorbs or releases.

Energy of Reaction

Exothermic reactions release energy, and endothermic reactions absorb energy. This means that in exothermic reactions the reactants have higher energy than the products. On the other hand, in endothermic reactions, the reactants are lower energy than the product. In this reaction, the reactants are higher energy, so the reaction is exothermic. This means that energy is released, and the energy of reaction will be negative.

Catalyst

A catalyst is a compound that can be added to a reaction to increase the rate of reaction. Catalysts increase the rate of reaction by decreasing the activation energy. This makes the reaction more likely to occur and speeds up the reaction. Catalysts also decrease the energy of the activated complex.

Answer:

Wind is an emissions-free source of energy

Overall, using wind to produce energy has fewer effects on the environment than many other energy sources. Wind turbines do not release emissions that can pollute the air or water (with rare exceptions), and they do not require water for cooling.

Explanation:

Answer:

About 96 grams per mole

Explanation:

The chemical formula of ammonium carbonate is \((NH_4)_2CO_3\). This means that breakdown of moles of atom per mole of molecule is:

2 moles of nitrogen, with a molar mass of around 14

8 moles of hydrogen, with a molar mass of around 1

1 mole of carbon, with a molar mass of about 12

3 moles of oxygen, with a molar mass of about 16

The molar mass of ammonium carbonate is therefore:

2(14)+8(1)+1(12)+3(16)=28+8+12+48=about 96

Hope this helps!

Answer:

You protect yourself and others from numerous injuries. Such safety equipment would be goggles, tongs, gloves(sometimes), hair pulled back, sleeves rolled up, etc.

Explanation:

Hydration is a specific example of the phenomenon known generally as a. solvation

The act of hydrating involves combining or dissolving an object in water. It is a particular instance of the more general phenomena known as solvation, which is the process by which solvent molecules surround and scatter a solute to create a homogeneous solution. However, hydration explicitly refers to solvation with water as the solvent.

Solvation may also happen with solvents other than water. Solvation is the process through which a solute and solvent interact to stabilise a solute species. Due to its impact on the solubility, reactivity, and behaviour of compounds in solution, solvation is a crucial mechanism in many chemical and biological processes.

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By raising the partial pressure of oxygen (p0) above the water's surface, it is possible to improve oxygen's solubility in water.




Henry's Law states that the partial pressure of a gas above a liquid directly correlates with the gas's ability to dissolve in the liquid.Therefore, increasing p0 while maintaining a constant pext is the right answer (a). The partial pressure of oxygen can be increased to do this by raising the oxygen concentration in the air above the water. Other ways to raise p0 can involve raising the water's temperature or lowering the atmospheric pressure over the water's surface.Alternately, lowering p0 (option b) would result in a reduction in the solubility of oxygen in water. Pext growth (option c)By raising the partial pressure of oxygen (p0) above the water's surface, it is possible to improve oxygen's solubility in water. Henry's Law states that the partial pressure of the gas above the liquid directly correlates to how soluble a gas is in a liquid. Other ways to raise p0 can involve raising the water's temperature or lowering the atmospheric pressure over the water's surface.Alternately, lowering p0 (option b) would result in a reduction in the solubility of oxygen in water. The solubility of oxygen in water would not be directly impacted by either option c or option d unless they also changed the partial pressure of oxygen above the water raising



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Answer:

diagram C best represents the mixture

Answer:

2 single, 0 double, and 1 triple

Explanation:

H-C≡C-H

Answer: Based on the stoichiometry 1 mole of carbon disulfide will produce 1 mole of carbon dioxide. Similarly we can apply the volume ratio, so 1.1L of carbon disulfide will produce 1.1L of carbon dioxide.

Hola aquí va la respuesta!

Se fomentó la inmigración europea porque la economía no era buena y vinieron a Paraguay para mejorar su situación.

Hola aquí va la respuesta!

Se fomentó la inmigración europea porque la economía no era buena y vinieron a Paraguay para mejorar su situación.

Answer:

Explanation:

By adding up the weights of each chain and dividing by the total number of chains, the average molecular weight can be calculated.

The average molecular weight is a crucial way to describe polymers. The entire weight of the polymer divided by the total number of molecules yields the average molecular weight. chromatography using gel permeation (GPC) Size exclusion chromatography is another name for gel permeation chromatography. It is a common technique for figuring out high molecular weight distribution. Using this method, chemicals are separated based on the size of their molecules. This is also the root-mean-square distance of the molecule's segments from the center of mass for polymer chains. One indicator of the magnitude of the random coil shape that many synthetic polymers adopt in solution or in the amorphous bulk state is the radius of gyration.

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The Kb for NH3 is 1.79×10−5.

In aqueous solutions, ammonium hydroxide (NH4OH) partially dissociates to form ammonium (NH4+) and hydroxide (OH-) ions.

The equilibrium constant for this dissociation is known as the Kb value for the reaction NH3 + H2O ⇌ NH4+ + OH-. The Ka and Kb values are related through the autoionization of water (Kw = Ka * Kb).

To find the Kb value for NH3, we can use the given Ka value for NH4+ (5.6×10−10) and the known value of Kw at 25°C (1.0×10−14). By rearranging the equation, Kb = Kw / Ka, we can calculate the Kb value as 1.79×10−5.

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It is important to address and mitigate the sources of methane emissions in order to mitigate the impacts of climate change.

A. The major aspects of the carbon cycle include the movement of carbon between the atmosphere, oceans, and land. Carbon is taken up by plants through photosynthesis, and then transferred to animals through the food chain.

When plants and animals die, their bodies decompose, and carbon is released back into the atmosphere or soil. Additionally, human activities such as burning fossil fuels and deforestation have significantly altered the carbon cycle, leading to increased levels of carbon dioxide in the atmosphere.

B. Methane is a potent greenhouse gas, meaning that it traps heat in the Earth's atmosphere and contributes to global warming. When methane is released into the atmosphere, it absorbs infrared radiation and warms the air. As the concentration of methane in the atmosphere increases, so does its impact on the temperature of the air.

This can lead to a range of negative effects, including more extreme weather patterns, rising sea levels, and the loss of biodiversity. Therefore, it is important to address and mitigate the sources of methane emissions in order to mitigate the impacts of climate change.

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Answer:

52.00 AMU

Explanation:

(49.946 * 0.043) + (51.941 * 0.838) + (52.941 * 0.095) + (53.939 * 0.024) = 51.998

Make sure to round, 52.00 AMU.

Answer:

the molecules of each substance attract each other through dispersion (London) intermolecular force.whether a substance is solid, liquid or gas depends on the balance between the kinetic energies of the molecules and their intermolecular attractions.

thank you.

Answer:

1.989 × 10^30 kg

Explanation:

Hope this helps! :3

☁️ Answer ☁️

A solar mass is the mass of the sun. Or, more precisely, it's 1.989 x 10^30 kilograms — about 333,000 Earths. Astronomers use a solar mass as a basic unit of mass.

Dear fool, you will always be a fool.

Happy April Fools Day.

Hope it helps.

Have a nice day noona/hyung

Answer:

stable

Explanation:

Fossils can form in three different ways is Preservation of original remains, Castings and permineralization.

The remnants or evidence of prehistoric life that have been successfully preserved by natural processes are known as fossils. Shells, bones, animal or microbe impressions in stone, exoskeletons, items stored in amber, petrified wood, coal, hair, oil, and Genetic traces are a few examples of fossils.

They provide as a direct link to historical ways of life, ecosystems, and climatic conditions. They show the historical evolution of life, the environment, and the climate, as well as the responses of living organisms to those changes. These lessons are particularly important at this time, as the contemporary world is evolving more and more. Nothing can ever replace a fossil.

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One type of neon has 10 neutrons, while other types have 11 neutrons and 12 neutrons. The term best defines the different types of neon atoms in nature is known as Isotopes.

Isotopes are atoms of the similar element that have indifferent numbers of neutrons but the equal number of proton and electrons.

The different in the neutrons results the same element with different masses.

Neon is a chemical element. Its symbol is denoted by Ne.

It is called as Nobel gas and the most stable element.

If talking about the properties it is odorless , uncolored, monoatomic, chemically inactive.

Also called as inert gas.

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Answer: isotopes

Explanation:

i took the test

Based on the information given, there is Lansing city among the options provided that is located at approximately 45° north latitude and 85° west longitude. Option B

To determine the city located at approximately 45° north latitude and 85° west longitude, we can refer to the given list of cities and their corresponding latitude and longitude coordinates.

Based on the latitude and longitude values provided, the city located at approximately 45° north latitude and 85° west longitude is Lansing. Lansing is the capital city of the state of Michigan and is situated in the Lower Peninsula of Michigan.

Boise, Denver, Austin, Saint Paul, Madison, Lansing, Indianapolis, Nashville, and Atlanta are all listed cities, but by examining their approximate latitude and longitude coordinates, we can see that Lansing is the closest match to the given coordinates.

It's important to note that the accuracy of the answer may depend on the precision of the latitude and longitude values provided for each city. However, based on the information given, Lansing is the city that aligns closest to the approximate coordinates of 45° north latitude and 85° west longitude.

Option B

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Answer:

D

Explanation:

Melting of ice is a physical change as there no new compound is forming only state is changing So Option D is correct option. For second question Option D is correct option as combustion reaction is taking place.

Chemical change is a reaction in which breaking and forming of new bonds take place. One molecule completely converted to totally different molecule. The number of atoms remains same

One famous example of chemical change is the rusting of iron. The color, odor and arrangements of atoms in products are very much different from reactant. Chemical change are mostly irreversible in nature.  Physical change is just opposite of chemical change. Phase change is an example of physical change.

Thus option D  is correct option in both cases.

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Answer:

about 5 years i think

Explanation:

I've tried all the methods i know

it's about 5 years

hope it helps

The age of the artifact is equal to 2.5 × 10³ years when the half-life of carbon- 14 is 5.73 × 10³ years.

The half-life of a radioactive element is defined as the time that is required to decrease the original quantity of a radioactive isotope to half after decay.

The half-life of a radioactive isotope is the feature of the element and does not depend upon the actual amount of the radioactive isotope.

Given, the ratio of the initial and left amount of  ¹⁴C is :

N = 0.745 N₀

The half-life period of the ¹⁴C isotope = 5.73 × 10³ years

The rate constant of the decay of radioisotope can be calculated from the below-mentioned formula:

\(\displaystyle k=\frac{0.693}{t_{1/2}}\)

\(\displaystyle k=\frac{0.693}{5.73 \times 10^3}\)

k = 0.123 × 10⁻³ yr⁻¹

The age of the artifact can be calculated as:
\(\displaystyle t =\frac{2.303}{k} log\frac{N_0}{N}\)

\(\displaystyle t =\frac{2.303}{0.123\times 10^{-3}} log\frac{N_0}{0.735 N_0}\)

t = 2.5 × 10³ years

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Element X has an electronegativity of 2. 5 and Y has an electronegativity of 9. X is a metal and Y is a non-metal.

The correct answer is option a.

Element X has a lower electronegativity than Element Y, which means that Element X is a metal and Element Y is a nonmetal.

The capacity of an atom to draw electrons towards itself when it establishes a chemical connection with another atom is measured as electronegativity. It is a fundamental feature of atoms and is commonly measured on the Pauling scale, which provides numerical values ranging from 0.7 (for the least electronegative element, cesium) to 4.0 (for the most electronegative element, uranium) (for the most electronegative element, fluorine).

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Answer:

Nucleus: Choice C

Electron: Choice E

Proton: Choice A

Neutron: Choice B

Energy Level: Choice D

Explanation:

1. Nucleus contains the protons and neutrons.

2. Electrons surround the nucleus and have a negative charge.

3. Protons are positively charged and found in the nucleus.

4. Neutrons have a neutral charge and are found in the nucleus.

5. The energy level refers to the electron orbital.

1. To solve for the grams of water produced, we need to use stoichiometry. First, we need to convert 2.1 moles of HNO3 to moles of water. From the balanced equation, we can see that for every 8 moles of HNO3, 4 moles of water are produced. Therefore, for 2.1 moles of HNO3:

Rounded to the nearest tenth, the answer is 18.9 grams of water.

2. Similarly, we need to use stoichiometry to find the grams of water produced. For 14.1 moles of HNO3:

Rounded to the nearest tenth, the answer is 84.6 grams of water.

3. To find the grams of N2 produced, we need to first convert 16.7 moles of CuO to moles of N2. From the balanced equation, we can see that for every 3 moles of CuO, 1 mole of N2 is produced. Therefore, for 16.7 moles of CuO:

4. To find the moles of N2 produced, we need to first convert 160.9 grams of CuO to moles. From the molar mass of CuO, we can see that 1 mole of CuO weighs 79.5 g.

Answer:

Explanation:

Decreasing the volume of a contained gas will increase its pressure, and increasing its volume will decrease its pressure. In fact, if the volume increases by a certain factor, the pressure decreases by the same factor, and vice versa. Volume-pressure data for an air sample at room temperature are graphed in Figure 5.

Because the volume has decreased, the particles will collide more frequently with the walls of the container. ... When the volume decreases, the pressure increases. This shows that the pressure of a gas is inversely proportional to its volume. This is shown by the following equation - which is often called Boyle's law.

The kinetic energy of the gas molecules increases, so collisions with the walls of the container are now more forceful than they were before. As a result, the pressure of the gas doubles. Decreasing the temperature would have the opposite effect, and the pressure of an enclosed gas would decrease.

For a fixed mass of gas at constant temperature, the volume is inversely proportional to the pressure. That means that, for example, if you double the pressure, you will halve the volume. If you increase the pressure 10 times, the volume will decrease 10 times.

Temperature, pressure, volume and the amount of a gas influence its pressure.

Gay Lussac's Law - states that the pressure of a given amount of gas held at constant volume is directly proportional to the Kelvin temperature. If you heat a gas you give the molecules more energy so they move faster. This means more impacts on the walls of the container and an increase in the pressure.

i really hope some of this helped i would put more but its a lot too type