1. How do aquatic animals obtain oxygen?
They weather sediment to release oxygen.
They filter the water for dissolved oxygen.
They breakdown seashells and other organic materials.
They separate oxygen from hydrogen in water molecules.
1

Answer:

The particles in the neutral paper can shift, causing the paper to become polarized and attracted to the rod.

Explanation:

The neutral paper has an even distribution of its electrons throughout the paper. If a charged rod is brought near the neutral paper, this can cause the electrons in the paper to shift. If the rod is negative, the electrons will be repelled from the rod and cause the molecules in the paper to have a slight positive charge on the part of the paper closest to the rod. If the rod is positive, the electrons will be attracted to the rod and cause a slight negative charge on the side of the paper closest to the rod.

Three ways to represent atoms or atomic cations with 11 electrons include :

\( {Mg}^{ + } \: {Al}^{2 + } \: {Si}^{3 + } \)

Mg = magnesium has 12 electrons in its neutral state, when it loses one electron to attain stability, it's election becomes 11.

Al = Aluminum has 13 electrons in its neutral state, when it donates 2 electron to attain stability, it becomes (13 - 2). = 11

Si = Silicon has 14 electrons on it's neutral state, when it loses 3 electrons to attain stability, we have (14 - 3) = 11

Hence,

\({Mg}^{ + } \: {Al}^{2 + } \: {Si}^{3 + } \)

are atomic cations with 11 electrons.

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The compound n - hexane as shown does not dissolve in water.

Due to a large difference in polarity between the two compounds, n-Hexane does not dissolve in water.

Water is a polar molecule, which means that one end of it (the hydrogen side) has a slight positive charge and the other end (the oxygen side) has a slight negative charge. The unequal distribution of electrons within the water molecule, which produces a dipole moment, is the cause of this polarity.

N-Hexane, on the other hand, is a nonpolar molecule. The electrons are uniformly distributed throughout the molecule, which is made up of carbon and hydrogen atoms bound together in a straight chain. N-Hexane lacks a substantial dipole moment as a result.

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6 mol of KClO3 will produce 288 grams of O2, when 6 mol of KClO3 decomposes.

How to calculate mass of O2 for this problem?

The balanced chemical equation for KClO3 decomposition is:

2 KClO3 →

2 KCl + 3 O2

According to the equation, 2 moles of KClO3 produce 3 moles of O2.

Therefore, 6 moles of KClO3 will produce (6/2) x 3 = 9 moles of O2.

To calculate the mass of O2 produced, we need to use the molar mass of O2, which is approximately 32 g/mol.

So, the mass of O2 produced will be:

mass = number of moles x (molar mass)

mass = 9 mol x 32 g/mol

mass = 288 g

Therefore, 6 mol of KClO3 will produce 288 grams of O2.

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Answer:

6am

Explanation:

answer this please thank you

Answer:

True

Explanation:

A typhoon forms when wind blows into areas of the ocean when the water is warm. These winds collect moisture and rise, while colder air moves in below. This creates pressure, which causes the winds to move very quickly. The wind rotates, or spin, around a center called an eye.

The pOH of a solution can be calculated using the formula: pOH = -log[OH-]. To find the [OH-] concentration when the pOH is 7, we need to convert the pOH value to the OH- concentration.

Starting with pOH = 7, we can rearrange the equation to find [OH-]. Taking the antilog of both sides, we get 10^(-pOH) = 10^(-7). This simplifies to [OH-] = 10^(-7) or 0.0000001 M.

Therefore, the [OH-] concentration in the solution with a pOH of 7 is 0.0000001 M or 1 x 10^(-7) M.

It's worth noting that the pOH and pH of a solution are related by the equation: pH + pOH = 14. In this case, if the pOH is 7, the pH of the solution would be 14 - 7 = 7.

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Answer:

vb

Explanation:

b

Answer:

photosynthesis

Explanation:

Answer:

cool or increase pressure

Explanation:

Answer:

C.

Explanation:

The section that represents the phase of water with the highest kinetic energy is the gas phase or vapor phase.

Gas phase or vapor phase section is above the boiling point curve, which separates the liquid and gas phases. At this point, the temperature is at or above 100°C (at standard atmospheric pressure), and the kinetic energy of the water molecules is sufficient to overcome the intermolecular forces holding them in the liquid phase and escape into the gas phase. The gas phase has the highest kinetic energy because the water molecules in this phase are more widely separated and move more rapidly than in the liquid or solid phases. The gas phase is also characterized by the highest entropy or disorder, as the molecules are free to move in any direction and occupy a large volume. The section that represents the phase of water with the highest kinetic energy is  gas phase or vapor phase.

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A leather jacket and printer paper are examples of items that can be made from renewable resources, while plastic forks, metal cans, and electronics are not considered renewable due to their reliance on non-renewable materials and processes. Option  C, E

The two correct answers that are made from renewable resources are:

C) Leather jacket: Leather is derived from animal hides, which are a byproduct of the meat industry. As long as there is a sustainable and responsible approach to animal farming, the production of leather can be considered renewable. The hides are obtained from animals that are raised for meat consumption, and their use in leather production helps reduce waste.

E) Printer paper: Printer paper can be made from various sources, including trees, bamboo, and recycled paper fibers. If the paper is sourced from sustainably managed forests or from fast-growing plants like bamboo, it can be considered renewable. Additionally, the use of recycled paper fibers reduces the demand for materials and promotes a more circular economy.

The other options, A) plastic fork, B) metal can, and D) electronics, are not made from renewable resources:

A) Plastic fork: Plastics are typically derived from fossil fuels, which are non-renewable resources. The production of plastic involves the extraction and processing of petroleum or natural gas, both of which are finite resources.

B) Metal can: Metal cans are predominantly made from aluminum or steel. While these metals can be recycled, their initial production requires the extraction of raw materials from the Earth, which is not a renewable process.

D) Electronics: Electronics are made from a wide range of materials, including metals, plastics, and various chemical compounds. The production of electronics involves the extraction of raw materials, many of which are non-renewable resources.

Option C and E.

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Answer:

3.57 × 10⁵ mol O₂

7.13 × 10⁵ mol H₂O

Explanation:

Step 1: Write the balanced equation

2 H₂ + O₂ ⇒ 2 H₂O

Step 2: Calculate the moles corresponding to 1.44 × 10⁶ g of hydrogen

The molar mass of hydrogen is 2.02 g/mol.

1.44 × 10⁶ g × (1 mol/2.02 g) = 7.13 × 10⁵ mol

Step 3: Calculate the moles of oxygen needed to react with 7.13 × 10⁵ moles of hydrogen

The molar ratio of H₂ to O₂ is 2:1. The reacting moles of oxygen are 1/2 × 7.13 × 10⁵ mol = 3.57 × 10⁵ mol.

Step 4: Calculate the moles of water produced from 7.13 × 10⁵ moles of hydrogen

The molar ratio of H₂ to H₂O is 2:2. The moles of water formed are 2/2 × 7.13 × 10⁵ mol = 7.13 × 10⁵ mol.

Answer:

D

Explanation:

Grinding to a powder increases the surface area of the charcoal .

The reaction of charcoal (carbon) and oxygen is sped up by grinding the charcoal into a fine powder. This is an example of increasing surface area to increase reaction rate. Option D is the answer.

Grinding charcoal into a fine powder enhances its reactivity by increasing surface area. This finer texture promotes more frequent collisions between charcoal particles and oxygen molecules, facilitating faster chemical reactions.

The heightened contact points enable efficient utilization of reactants, optimizing resource consumption. Shorter diffusion paths within smaller particles expedite reactant diffusion, aiding quicker reaction rates.

Additionally, the augmented surface area promotes efficient heat transfer, crucial in reactions involving temperature changes.

Grinding charcoal amplifies the reaction rate by maximizing interaction opportunities, accelerating the conversion of charcoal and oxygen into products.

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Answer:

its sodium hydroxide

Explanation:

Answer: A warm front is the transition area where a mass of warm air moves to replace a mass of cold air. On a weather map, a warm front is usually drawn using a solid red line with half circles pointing in the direction of the cold air that will be replaced. Warm fronts usually move from southwest to northeast. A warm front can initially bring some rain, followed by clear skies and warm temperatures.

Explanation: I got this from a website called SciJinks.gov. I hope that it answers your question and that this helps. Good luck!

Answer:

In case anyone wants both

Explanation:

Cold fronts appear on weather maps in areas of ( large temperature and air pressure decrease )

Warm fronts appear on weather maps in areas of ( temperature and air pressure increase )

The balanced molecular equation for the reaction between sodium hydroxide (NaOH) and aluminum chloride (\(AlCl_3\)) in aqueous solution can be written as follows: 2NaOH(aq) + 3\(AlCl_3\)(aq) → 3NaCl(aq) + \(Al(OH)_3\)(s)

In this reaction, sodium hydroxide (NaOH) reacts with aluminum chloride (\(AlCl_3\)) to form sodium chloride (NaCl) and aluminum hydroxide (\(Al(OH)_3\)). The coefficients in the balanced equation indicate the stoichiometric ratio between the reactants and products.

The physical states of the substances are indicated by the symbols (aq) for aqueous solutions and (s) for the solid precipitate.

The reaction is a double-displacement reaction, also known as a precipitation reaction. Double-displacement reactions involve the exchange of ions between two compounds, resulting in the formation of a precipitate.

In this case, sodium hydroxide and aluminum chloride react to form sodium chloride and aluminum hydroxide, with aluminum hydroxide being the white solid precipitate.

It's worth noting that the actual reaction might involve hydrated forms of the compounds, such as NaOH·x\(H_2O\) and \(AlCl_3\)·y\(H_2O\). However, for simplicity, these hydrated forms are not included in the balanced equation.

Overall, the balanced equation represents the chemical reaction between sodium hydroxide and aluminum chloride, showing the reactants, products, and their stoichiometric ratios.

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Answer:

In the given question, the mass of empty slender is given 25 points 489 Grand. The mass of Slender plus unknown liquid is given 57 points 847 g. The volume of a non liquid is given 45 three ml. We have to find the density of a non liquid. Firstly we will find the mass of unknown liquid. As the mass of unknown liquid is equal to the mass of cylinder plus unknown liquid minus the mask of empty cylinders. So the mass of a non liquid is equal to seven points 847 g -25 points 489 g. The mass of a non liquid will be 32 points 358 g. The formula to calculate the density of a non liquid is equal to the mass of a non liquid divided by the volume of a non liquid. So we will put the values as the mass of a non liquid is 32.358 g, Divided by the volume, which is given 45.3 ML. When we solve this Comes out to be 0.71 g, but I am in. So the Final answer is the density of a non liquid is equal to 0.71 g.

Answer: I think A

Explanation:

Answer: Its a glacier A

Explanation:

Its cold and it is frozen lakes, pond, and seas do not look like that.

Answer:

main asteroid belt separates the inner planets from the outer planets

The exponent to the power of 0 would be the correct answer in this situation.

Initial rate is the rate of reaction at the beginning of a chemical reaction. It is usually measured at the start of the reaction and is usually higher than the rate at equilibrium. The initial rate is an important factor in determining the rate of reaction and the products of the reaction. It can be used to determine the effects of various factors such as temperature, pressure, and concentration on the reaction rate.

Exponents represent the number of times the base number is multiplied by itself. So, if the rate does not double nor stay the same, then it is not being multiplied by itself, so the exponent would be to the power of 0.

Exponentiation can be used to show how many times a number is multiplied by itself, and this is done by raising the base number to a certain power. For example, 4 to the power of 3 means 4 x 4 x 4 = 64. In this case, the exponent is 3.

If the initial rate does not double nor stay the same, then the power associated with the exponent would be 0. This is because the rate is not being multiplied by itself, so it would not be associated with any power. Therefore, the exponent would be to the power of 0.

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Some types of solids that are insoluble in water are:

Many solids are insoluble in water, meaning they do not dissolve in water to a significant extent. Here are some examples of common solids that are generally insoluble in water:

Metals: Most metals, such as gold, silver, platinum, and copper, are insoluble in water.

Non-Metallic Elements: Many non-metallic elements, such as carbon (in the form of graphite or diamond), sulfur, phosphorus, and iodine, are insoluble in water.

Metal Oxides: Some metal oxides, particularly those of less reactive metals, are insoluble in water. Examples include aluminum oxide (Al2O3), iron(III) oxide (Fe2O3), and lead(II) oxide (PbO).

Metal Carbonates: Most metal carbonates are insoluble in water. Examples include calcium carbonate (CaCO3), lead(II) carbonate (PbCO3), and copper(II) carbonate (CuCO3).

Metal Sulfides: Many metal sulfides are insoluble in water. Examples include lead(II) sulfide (PbS), silver sulfide (Ag2S), and mercury(II) sulfide (HgS).

Insoluble Salts: Certain salts have limited solubility in water. Examples include silver chloride (AgCl), lead(II) iodide (PbI2), and calcium sulfate (CaSO4).

It's important to note that while these solids are generally insoluble in water, they may exhibit some solubility to a small extent. The solubility of a solid in water can vary depending on factors such as temperature, pressure, and the presence of other solutes.

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Answer:

The main function of the immune system is to provide immunity to the body. Immunity is the body's ability to protect itself from the pathogens it is exposed to. Immunity depends on the body's ability to differentiate between things that belong in the body and those that do not. The immune system's first line of defense includes physical and chemical barriers that are always ready and prepared to defend the body from infection.

The skin acts as a barrier against pathogens. Some structures of the first line of defense include the skin, mouth, eyes, ears, nose, and stomach. The skin produces sweat and oil that work together to keep pathogens from the entering the body. Saliva and tears contain substances the can destroy pathogens. The ears and the stomach help fight pathogens.The ears produce ear wax that prevent pathogens from entering the ears. The stomach produces a liquid the kills pathogens.

Mucus is produce by the nose, lungs, throat, and stomach. Mucus traps pathogens. Mucus also prevent pathogens from getting into deep tissues. Anyway, the very first line of defense against any invasion of the human body is a set of physical barriers between the inside of the body and the outer world.

*my notes from edge2020*

Hope this helps ^-^

Answer: The final pressure inside the tank is 8.41 kPa.

Explanation: We can use the combined gas law to solve this problem, which relates the pressure, volume, and temperature of a gas:

(P1V1)/T1 = (P2V2)/T2

where P1, V1, and T1 are the initial pressure, volume, and temperature, respectively, and P2, V2, and T2 are the final pressure, volume, and temperature, respectively.

We are given P1 = 25.0 kPa, T1 = -50 C = 223 K, and V1 is unknown. We also know that the temperature decreases by a factor of three, so T2 = T1/3 = 223/3 K.

To find V2, we need to assume that the steel container is rigid and its volume remains constant. Therefore, V1 = V2, and we can cancel out the volume from the equation:

P1/T1 = P2/T2

Substituting the values, we get:

P2 = P1 * T2 / T1 = 25.0 * (223/3) / 223 = 8.41 kPa

Therefore, the final pressure inside the tank is 8.41 kPa.

Answer:

So if pressure of a gas is increased by 25%, the volume of a gas is decreased by 25%.

Explanation:

Answer:

I think the answer could be A

Explanation:

because there is different amounts of gravity which makes us lighter, although it could be wrong

If an equation includes 7(CrO₄)₂, the numbers of Cr's and O's atoms that are there are 14 and 56 respectively.

The number of atoms present in a chemical compound can be calculated by multiplying the subscript of the particular element by any coefficient.

According to this question, 7 moles of chromate with the chemical formula; (CrO₄)₂ is given. The number of oxygen and chromium atoms in this compound can be calculated as follows:

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Answer:

Option D. 1–chloro–3–methylbenzene

Explanation:

To name the compound given in question above, the following must be observed:

1. Determine the functional group of compound.

2. Identify the substituent group attached to the compound.

3. Identify the position of the substituent group by giving it the lowest possible count.

NOTE: numbering is done alphabetically.

4. Combine the above to obtain the name

Now, we can obtain the name of the compound as follow:

1. The compound is an aromatic compound with the benzene ring.

2. The substituent groups attached to compound are:

I. Chlorine (Cl)

II. Methyl (–CH₃)

3. The position of the substituent group attached are:

I. Chlorine is located at carbon 1

II. Methyl (–CH₃) is located at carbon 3

4. The name of the compound is:

1–chloro–3–methylbenzene