A 0.063 mol sample of formaldehyde vapor, CH2O, was placed in a heated 500 mL vessel and some of it decomposed. The reaction is:


CH2O(g) + H2(g) → CO(g)


At equilibrium, the CH2O(g) concentration was 0.029 mol L^-1. Calculate the value of Kc for this reaction

Friction causes the molecules on rubbing surfaces to move faster, therefore they have more energy. This gives them a greater temperature, and they feel warmer.

The term friction is defined as the resistive force that occurs when two bodies in contact move relative to one another.

Adhesion between body surfaces, and the adhesion is the molecular force that occurs when two materials come into contact with each other are the causes of friction.

Friction is an everyday force that is generated by two surfaces when they are interacting. When these surfaces slide against each other, this interaction increases the thermal energy of the two surfaces.

Thus, Friction causes the molecules on rubbing surfaces to move faster, therefore they have more energy.

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To produce 1000 kg of fishmeal (M = 1000 kg), you would need 3000 kg of pasta. To determine the amount of pasta required to produce 1000 kg of fishmeal, we need to consider the mass balance of the process. Let's break down the steps involved:

A. Extraction of fish oil:

The pasta obtained from the extraction stage contains 20% flour and 80% water. To calculate the amount of pasta, we need to determine the mass of flour and water in the pasta. Let's assume the total mass of the pasta is P kg.

Mass of flour = 20% of P = 0.2P kg

Mass of water = 80% of P = 0.8P kg

b. Drying of pasta:

During the drying stage, the pasta is dried in a rotary drum, resulting in fishmeal with 40% humidity. This means that the final fishmeal will contain 60% dry matter.

Let's assume the mass of the dried fishmeal is M kg.

Mass of dry matter = 60% of M = 0.6M kg

Since the dry matter in the fishmeal comes from the flour in the pasta, we can equate the mass of dry matter to the mass of flour:

0.6M kg = 0.2P kg

To produce 1000 kg of fishmeal, we want to find the corresponding value of P:

0.6M = 0.2P

P = (0.6M) / 0.2

P = 3M

Therefore, to produce 1000 kg of fishmeal (M = 1000 kg), you would need 3000 kg of pasta.

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Answer:

A solution in which the maximum amount of solvent has been dissolved

Explanation:

For example, 36g of salt in 100g of water.

A liquid at 50 degrees Celsius would have a melting point of 50 degrees Celsius and a boiling point of approximately 173.15 degrees Celsius.

What is the liquid?

iquid is a state of matter that has a definite volume, but does not have a fixed shape. It is one of the four fundamental states of matter, along with solid, gas, and plasma. Liquids tend to have a greater volume than solids, but geneLrally take the shape of their container. Examples of liquids include water, milk, blood, gasoline, and oil. Liquids are composed of molecules that tend to have greater mobility and can easily flow past each other. Depending on the temperature, pressure, and composition of the liquid, it can undergo changes in the state of matter.

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Answer:

what? that's 66 total, 6 more elliptical machines, a 1 to 1.2 ratio

but I don't know what else you would mean

Answer:

5:6

Explanation:

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Cementation during the diagenesis process reduces the porosity and permeability of rocks by filling the pore spaces between grains with mineral cements, impacting fluid flow and rock strength.

Cementation is a process in which minerals precipitate and fill the spaces between sediment grains, binding them together. This process occurs as pore fluids, such as groundwater, carry dissolved minerals that can precipitate and form a solid cementing material.

During diagenesis, cementation can significantly impact the permeability and porosity of rocks. The precipitation of mineral cements fills the pore spaces between grains, reducing the overall porosity of the rock. This reduction in porosity limits the amount of fluid that can flow through the rock and decreases its permeability.

The type of mineral cement formed during cementation can also influence the strength and durability of the rock. Common mineral cements include calcite, silica, and iron oxides, which can impart different properties to the rock.

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The best explanation for the reason why the law of is not broken in a closed system is that the momentum that is lost by the puck is gained by the ball. Option D.

We know that the law of the conservation of linear momentum states that the total momentum after collision must be equal to the total momentum before collision. In other words, the total momentum of the system must remain constant.

We have to recall that there is a loss and gain of momentum here. The puck would loose momentum as it strikes the ball and the ball would gain momentum as the speed of the ball increases.

We must note that the law of the conservation of linear momentum would only work in a closed system as is the case in the question that we have here.

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Answer:

C (top to bottom) or the 3rd one

Explanation:

This suggests that the unknown starting material is likely an organic compound containing a carboxylic acid functional group.

Compound is a combination of two or more elements which are chemically bonded together. Compounds can exist in both organic and inorganic forms, and are formed when atoms of different elements combine to form molecules. Inorganic compounds are generally composed of metal and non-metal elements, while organic compounds are composed of only carbon and hydrogen atoms. Compounds can also be classified according to their physical state, such as solid, liquid, or gas. Compounds are important in many areas of science, such as chemistry, physics, and biology, and play an essential role in the production of many products, including medicines, plastics, and fuels.

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Answer:

no

Explanation:

The formation of a one-solar-mass star involves several stages that occur in a particular order and the four stages shown in the figures are molecular-cloud fragment, contracting cloud trapping infrared light, protostar with jets, and main-sequence star.

The first stage, molecular-cloud fragment, involves the fragmentation of a molecular cloud due to gravitational instability. This fragmentation results in the formation of a dense, compact region known as a proto stellar core. The second stage, contracting cloud trapping infrared light, occurs as the proto stellar core begins to contract due to gravity.

As the core contracts, it traps infrared light, causing the temperature and pressure to rise. This leads to the third stage, protostar with jets. During the third stage, protostar with jets, the protostar begins to generate strong magnetic fields, which generate jets of matter that extend out from the protostar's poles. The protostar also continues to contract, causing the temperature and pressure to increase further.

Finally, the fourth stage, main-sequence star, occurs when the protostar's core becomes hot and dense enough to initiate nuclear fusion. At this point, the protostar becomes a main-sequence star, which is characterized by a stable state of energy production through nuclear fusion. Therefore, the correct order of these stages is: molecular-cloud fragment, contracting cloud trapping infrared light, protostar with jets, and main-sequence star.

The question was incomplete. find the full content below:

The following figures show four stages that occur during the formation of a one-solar-mass star. Rank these stages based on the order in which they occur, from first to last.

First to last to occur:

-molecular-cloud fragment

-contracting cloud trapping infrared light

-protostar with jets

-main-sequence star

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Diffraction occurs whenever a portion of a wavefront is obstructed by some opaque object.

There is differ motion you go through the day translational, rotational, periodic, and non periodic motion.

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Sorry if it wrong

Answer:

The sun is always how plants get glucose

The plants get the glucose monomers they need for building carbohydrate polymers by incorporating atoms from the surrounding environment.

The term carbohydrate is defined as an optically active polyhydroxy aldehydes or ketones or the compounds which produce units of such type on hydrolysis”.

Carbohydrates are made up of carbon, hydrogen, and oxygen. Monosaccharides, disaccharides, oligosaccharides, and polysaccharides are all types of carbohydrates.

Plants use atoms from their surroundings to incorporate the glucose monomers they require. In order to create glucose and oxygen molecules, plants use the carbon dioxide and water molecules in their surroundings.

Thus, The plants get the glucose monomers they require for building carbohydrate polymers by incorporating atoms from the surrounding environment.

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The condensed structural formula for the product of the hydrogenation of 2-butene using a platinum catalyst  CH3 – CH2 – CH2 – CH3

What is hydrogenation of alkene ?

Molecular hydrogen (H2) and another substance or element undergo a chemical reaction known as hydrogenation, typically in the presence of a catalyst such as nickel, palladium, or platinum. The method is frequently used to saturate or decrease organic molecules.

In order to give shortenings a hard firmness and plasticity, hydrogenation is the process of saturating certain double bonds and converting others to trans configuration. This enables the formation of solid and semi-solid fats.

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Answer:

ionic bond is the type of bond formed from electrostatic attraction between oppositely charged ion in a chemical compound

Answer:

B. They work well in bright light to detect color.

Explanation:

Answer:

The answer is b

Explanation:

I hope I helped

Answer:

The answer is there are 9.57 x 10²⁰ number of Cl atoms in 0.0728 g of PCl₃.

Number of moles = mass / molar mass

Mass of PCl₃ = 0.0728 g and molar mass of PCl₃ = 137.33g/mol

Number of moles of PCl₃ = 0.0728 / 137.33 = 5.3 x 10⁻⁴

In one mole there are Avogadro’s number of molecules that is 6.02 x 10²³

So, in 5.3 x 10⁻⁴ moles of PCl₃, there are =5.3 x 10⁻⁴ x 6.02 x 10²³ = 3.19 x 10²⁰

Now there is 3 atoms of Cl in PCl₃ so in 3.19 x 10²⁰ molecules of PCl₃, number of Cl atoms = 3.19 x 10²⁰ x 3 = 9.57 x 10²⁰ atoms

Answer:

Q1: 9

Q2:10

Q3: 50

Q4:True

Q5: False

Q6:False

Q7:True

Explanation: Just took the quiz

Answer:

The Soviet Nation attempted to

The second statement, "The strong nuclear force keeps protons and electrons in an atom together, not protons and neutrons," is incorrect. which is off-base.

Option B is correct .

The protons are in the cores of the molecules with the neutrons. Protons have a positive charge, whereas neutrons do not. So, given that they are all positive charges,

The strong nuclear force is responsible for keeping the protons and neutrons in the nucleus together. The nuclei could not exist without the powerful nuclear force.

Along with gravity, electromagnetism, and the weak force, the strong force, also known as the strong nuclear force, is one of nature's four fundamental forces. The strong force is the strongest of the four, as its name suggests. It creates larger particles by binding fundamental matter particles, or quarks.

Incomplete question :

Franny made a chart to summarize the characteristics of the two nuclear forces. Which describes the error in her chart?

A. The strong nuclear force must be strong enough to overcome the repulsive force of protons, not electrons.

B. The strong nuclear force keeps protons and electrons together in an atom, not protons and neutrons.

C.The weak nuclear force is responsible for alpha and beta decay, not just beta decay.

D.The weak nuclear force keeps particles that make up neutrons and electrons together, not neutrons and protons.

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Answer:

B is wrong

Explanation:

Answer:

Matching

6.D

7.A

8.C

9.B

Explanation:

Took test

103 °C, 90 °C, 101 °C Neither accurate nor precise, 100 °C, 99 °C, 100 °C are Precise, 105 °C, 106 °C, 105 °C are Both accurate and precise, 99 °C, 101 °C, 100 °C are Accurate. These are the correct set of measurements of the boiling point of water.

The melting point is defined as the temperature at which solid and liquid phases are at equilibrium state, whereas the boiling point is defined as the temperature at which the pressure of a vapor of a  liquid is equal to the external pressure.

Melting point in which the melting of solid occur to become a liquid at a given temperature, here the molecules gain enough amount of kinetic energy to get the intermolecular forces to convert into another form.

In case of Boiling point the liquid phase enters into the gaseous phase, when the external pressure is high than a temperature for the vapor pressure equal to the external pressure.

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The molarity of the hydrochloric acid solution in the reaction between NaOH and HCl, 1 mole of NaOH reacts with 1 mole of HCl. 1 NaOH + 1 HCl → 1 NaCl + 1 H2O (Mole ratio of NaOH to HCl is 1:1) • The concentration of the NaOH was 0.1 M, or 0.1 moles/liter.

What is molarity?

Molarity (M) is the quantity of a substance in a given extent of solution. Molarity is described because the quantity of moles of solute consistent with liter of solution. Molarity is likewise known as the molarity of a solution.

Therefore, The molarity of the hydrochloric acid solution in the reaction between NaOH and HCl, 1 mole of NaOH reacts with 1 mole of HCl. 1 NaOH + 1 HCl → 1 NaCl + 1 H2O (Mole ratio of NaOH to HCl is 1:1) • The concentration of the NaOH was 0.1 M, or 0.1 moles/liter.

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There are 0.615 moles of carbon-13 atoms in 8.00 g of carbon-13.

A mole is a unit of measurement used to express the amount of a substance. It is defined as the amount of a substance that contains as many elementary entities (such as atoms, molecules, or ions) as there are atoms in exactly 12 grams of carbon-12.

The mole is often represented by the symbol "mol" and is used to quantify the number of particles or entities in a sample. One mole of any substance contains Avogadro's number of particles, which is approximately 6.022 × 10²³.

Given,

The molar mass of carbon-13 = 13.00335 g/mol.

Number of moles = Mass / Molar mass

Number of moles = 8.00 g / 13.00335 g/mol = 0.615 moles

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Answer:

High levels of nitrogen dioxide are also harmful to vegetation—damaging foliage, decreasing growth or reducing crop yields. Nitrogen dioxide can fade and discolour furnishings and fabrics, reduce visibility, and react with surfaces.

1-We could use low-nitrogen fuels

2- We could also modify combustion conditions to generate less NOx. Flue gas treatment techniques, such as selective cata- lytic reduction (SCR) processes, can remove NOx

The mass of the products was the same as that of the reactants helped Antoine Lavoisier found that mass was conserved in chemical reactions.

It is widely acknowledged that Lavoisier's major contributions to chemistry were greatly influenced by his shift from a qualitative to a quantitative approach to the field.

Most people know Lavoisier for his discovery of the function of oxygen in combustion. He challenged the phlogiston idea and recognized and called oxygen (1778) and hydrogen (1783). Lavoisier created the first comprehensive list of elements, contributed to the development of the metric system, and reformed chemical nomenclature. He observed that although matter can change its form or shape, its mass always remains the same (1787) and anticipated the development of silicon.

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Answer:

the volume should be in cubic cm so I assumed that you wanted to write the same . then the answer is 5489.07 kg/m^3

Answer:

\(\boxed {\boxed {\sf d\approx5.49 \ g/cm^3}}\)

Explanation:

Density can be found by dividing the mass by the volume.

\(d=\frac{m}{v}\)

The mass of the rock is 555 grams and the volume is 101.1 cubic centimeters.

\(m=555 \ g \\v= 101.1 \ cm^3\)

Substitute the values into the formula.

\(d=\frac{555 \ g}{101.1 \ cm^3}\)

Divide.

\(d=5.48961424 \ g/cm^3\)

Let's round to the nearest hundredth to make the answer more concise.

The 9 in the thousandth place tells us to round up. In the tenth place, the 8 will become a 9.

\(d\approx5.49 \ g/cm^3\)

The density of the rock is about 5.49 grams per cubic centimeter.

Answer:

What are the answer choices

Explanation:

Answer:

The answer choices are

Explanation:

A. The ocean plants cause more weathering.

B. More algae grows and competes for resources.

C. the slow water causes more erosion.

D. Less sediment is deposited in the soil.

But the answer is (D. Less sediment is deposited in the soil.)

The amount of CH3CH2Cl formed is a function of the amount of CH4 and Cl2 present and can be calculated using the stoichiometric ratios.

Assuming a 1:1 ratio of CH4 and Cl2, a very small amount of CH3CH2Cl will be formed.

1) The chlorination of CH4 begins with the attack of chlorine radicals on the methane molecule, forming a methyl radical and a hydrogen chloride molecule:  CH4 + Cl2 → CH3• + HCl.

2) The methyl radical then reacts with another chlorine radical to form an ethyl radical and a chlorine molecule: CH3• + Cl2 → CH3CH2• + Cl.

3) The ethyl radical then reacts with a chlorine molecule to form an ethyl chloride molecule and a hydrogen atom: CH3CH2• + Cl → CH3CH2Cl + H•.

4) Finally, the hydrogen atom reacts with a chlorine molecule to form another hydrogen chloride molecule and a chlorine atom: H• + Cl2 → HCl + Cl.

Overall, the reaction can be written as: CH4 + Cl2 → CH3CH2Cl + HCl. The amount of CH3CH2Cl formed is a function of the amount of CH4 and Cl2 present and can be calculated using the stoichiometric ratios. Assuming a 1:1 ratio of CH4 and Cl2, a very small amount of CH3CH2Cl will be formed.

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