Guys pls help me ill give 10 points

Why are important documents stored in an environment without air from the atmosphere?

The main reservoirs of the carbon cycle are the atmosphere, oceans, land (including vegetation and soils), and fossil fuels. In these reservoirs, carbon exists in both inorganic and organic forms.

The inorganic carbon cycle involves the exchange of carbon dioxide (CO2) between the atmosphere and oceans through processes like photosynthesis and respiration.

Organic carbon, on the other hand, is found in living organisms, dead organic matter, and soil organic matter. It is cycled through processes such as decomposition and consumption by organisms. The interactions between the inorganic and organic carbon cycles occur primarily in the biosphere, where photosynthesis converts inorganic carbon into organic carbon compounds. While inorganic carbon is primarily in the form of CO2, organic carbon is present in complex organic molecules. Both forms of carbon play crucial roles in energy transfer, nutrient cycling, and climate regulation.

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There are approximately 11.78 grams of oxygen gas (O2) in 8.25 L at STP.

To calculate the number of grams of oxygen gas (O2) in 8.25 L, we need to use the ideal gas law which states:

PV = nRT

Where;

Assuming standard temperature and pressure (STP) conditions (0°C and 1 atm), we can use the molar volume of a gas at STP, which is 22.4 L/mol, to calculate the number of moles of oxygen gas in 8.25 L:

n = (V / V_m) = (8.25 L) / (22.4 L/mol) = 0.3683 mol

The molar mass of O2 is approximately 32 g/mol, so we can calculate the number of grams of oxygen gas in 0.3683 mol:

mass = n x molar mass = 0.3683 mol x 32 g/mol = 11.78 g

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Answer:

2.41 mol

Explanation:

53.9 L x 1 mol/22.4 L = 2.41 mol

Answer:

b

Explanation:

i am smart

All elements are mostly pure substances. A few of them include gold, copper, oxygen, chlorine, diamond, etc. Compounds such as water, salt or crystals, baking soda amongst others are also grouped as pure substances.

Explanation:

\(\Large\textbf{C) Mixtures}\)

Answer:

CH4 + O2 = CO2 + H2O.

Answer:

CH4 + O2 = CO2 + H2O.

Explanation:

The changes in the mass of the egg and volume of liquid in the beaker are inversely proportional. This demonstrates that volume is moving from one area to another.

Osmosis is a process in which solvent molecules will move from the higher concentration area to the lower concentration area.

When we put egg in any vessel where water is present then water molecule will move into the egg molecule as a result of the osmosis and due to this mass is inversely proportional to the volume. In this phenomenon water is moving from one area to another due to osmosis.

Hence volume is moving from one area to another.

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Three human activities that release chemicals that produce acid rain are Burning fossil fuels, Industrial emissions and Agricultural practices.

Acid rain is caused by the presence of sulfur dioxide (SO₂), nitrogen oxides (NOₓ), and other acidic pollutants in the atmosphere. These pollutants are primarily released through human activities.

Burning fossil fuels: The combustion of coal, oil, and gas in power plants and vehicles releases sulfur dioxide (SO₂) and nitrogen oxides (NOₓ), which contribute to acid rain when they react with the atmosphere.

Industrial emissions: Various industries release pollutants such as sulfur dioxide (SO₂) and nitrogen oxides (NOₓ) during manufacturing processes, particularly in the production of chemicals and metals.

Agricultural practices: The use of fertilizers and animal waste in agriculture can release ammonia (NH₃) and nitrogen oxides (NOₓ), which can contribute to acid rain when they combine with atmospheric moisture.

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Answer: it will be A nd B hope this helps

Explanation: pls give me brainliest

Turbidity can be given as the presence of haziness or the cloudy nature of the fluid. The turbidity gives the clarity of measurement and may result from human activity.

The turbidity is due to the presence of suspended solute particles in the solution, that are large and small.

The sedimentation of particles results in lower turbidity. The increase in human activities may result in turbidity in the water.

The turbidity is able to stop the growth of the algae and fish biome, and it is not transported via rain.

Thus, turbidity can be given as the measure of water clarity and is the result of human activities. Thus, options A and C are correct.

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Answer:

Cinder cone-made of pieces of lava

caldera-bowl-shaped depression

volcanic soil-rich in nutrients

lava plateau-material fills in valleys

shield volcano-wide summit, gentle slope

Explanation:

Just did it

Answer: See image

Explanation: match the landform to its description

Using NAD and NADH reaction for the oxidation of methanol CH₃OH to formaldehyde, in which NAD is the oxidizing agent and then alcohol oxidase was crystallized after purification by ammonium sulfate precipitation

Oxidation means a process in which a chemical substance changes because of the addition of oxygen

Methanol was oxidized to formaldehyde by an alcohol oxidase and the reaction are

CH₃OH+O₂ → HCOH + H₂O₂

And the cofactor found in two form of cell and NAD is an oxidizing agent and it accept the electron of other molecule and reduced and this reaction is also with H⁺ form NADH which can be used as the reducing agent to donate electron and this reaction gives alcohol oxidase was crystallized after purification by ammonium sulfate precipitation

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Answer:

A neutralization reaction is when an acid and a base react to form water and a salt and involves the combination of H+ ions

Explanation:hope this helps<33

Es(CO) .

muchas gracias!!

Answer:

\({ \bf{a). \: CO}}\)

Answer:

CH4 + 2O2 → CO2 + 2H2O

Explanation:

This is all i could come up with im sorry.

The amount of water formed in the given chemical reaction is 9 grams.

Stoichiometry is the calculation for the determination of the relative amount of reactants and products in chemical reactions. Stoichiometry is based on the law of conservation of mass where the total mass of the reactants in reaction equals the total mass of the products.

If the quantity of one reactant is known and the quantity of the product can be determined empirically, then the quantity of the other reactants can be calculated.

Given chemical equation is:

CH₄  +   2O₂  \(\longrightarrow\)   CO₂   +   2H₂O

16g        32g         44g           32g        (from their molecular masses)

The amount of methane, oxygen, and carbon dioxide is 4g, 16g, and 32 g respectively.

16g of methane react with oxygen = 32g

4g of  methane will react with oxygen = 8g

It means here methane is the limiting reagent as the given amount of oxygen is more than reacted one.  So CH₄ will decide the amount of water.

16g of methane produces water = 32g

Then 4g of methane will produce water = (32/16) × 4 = 9 g

Therefore, 9 grams of water should be formed in this reaction.

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The reaction involved is the reaction of PbO with sodium carbonate (Na2CO3) to produce lead(II) carbonate (PbCO3) and sodium oxide (Na2O).

To prepare a solid sample of lead(II) carbonate, we can start with lead(II) oxide (PbO) as the starting material. The chemical equation for the reaction is:

PbO + Na2CO3 → PbCO3 + Na2O

To carry out the reaction, we first need to weigh out the required amount of PbO and Na2CO3 based on the stoichiometry of the reaction. The PbO and Na2CO3 are then mixed thoroughly and placed in a crucible. The mixture is heated in a furnace at a temperature of around 600-700°C for a few hours until the reaction is complete and the mixture has turned into a solid mass.

Once the reaction is complete, the crucible is removed from the furnace and allowed to cool to room temperature. The solid mass of PbCO3 is then carefully removed from the crucible, crushed to a fine powder, and stored in an airtight container for further use. This method is a simple and efficient way to prepare a solid sample of lead(II) carbonate from lead(II) oxide.

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Answer:

A typical range of ATOMIC radii would be 0.050 − 0.200 nm or so.

(a) Charge on the rubidium ion: +1.

Charge on the bromide ion: -1.

Rubidium (Rb) is a group 1 element, and it tends to lose one electron to achieve a stable electron configuration, forming a cation with a +1 charge. On the other hand, bromine (Br) is a group 17 element that tends to gain one electron to achieve a stable electron configuration, forming an anion with a -1 charge.

(b) The rubidium ion (Rb+) is related to the noble gas krypton (Kr) in terms of its electron configuration. Both the rubidium ion and krypton have the same outer electron configuration, which is the stable electron configuration of the nearest noble gas. In the case of Rb+, it achieves this stable configuration by losing one electron, while krypton already naturally possesses the stable configuration.

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Answer:

A.

Explanation:

Warmer temperatures can also lead to a chain reaction of other changes around the world. That's because increasing air temperature also affects the oceans, weather patterns, snow and ice, and plants and animals. The warmer it gets, the more severe the impacts on people and the environment will be.

Intermolecular forces are the forces of attraction or repulsion between neighboring molecules, determining the physical properties of substances, including their melting and boiling points, viscosity, surface tension, and solubility. The intermolecular forces that occur in Crystal Violet (C25 H30 N3 Cl) include dispersion forces, dipole-dipole, and hydrogen bonds.

Dispersion forces:

Dispersion forces, also known as London forces, are weak forces between molecules that occur due to temporary dipoles that arise when the electron density of a molecule is not uniform. The molecules in Crystal Violet have an uneven distribution of electrons, resulting in temporary dipoles, which result in attraction forces between the molecules.

Dipole-dipole:

Dipole-dipole forces occur in polar molecules that have a positive end and a negative end. In Crystal Violet, the polar Cl atom creates a dipole moment, attracting the neighboring polar molecules.

Hydrogen bonds:

Hydrogen bonds are a specific type of dipole-dipole force that occurs when hydrogen atoms in polar molecules interact with electronegative atoms such as oxygen, nitrogen, or fluorine. In Crystal Violet, the nitrogen atoms can form hydrogen bonds with the electronegative Cl atoms, resulting in additional intermolecular forces.

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Answer:

It is an Ionic bond

According to NOAA experts, invasive lionfish populations will keep expanding and cannot be controlled by traditional means.

A marine species known as a "lionfish" has stripes that resemble zebra stripes and is typically red, brown, and white. In their non-native area, there are two different but outwardly identical species, however around 97 percent of them are red lionfish.

Regrettably, NOAA scientists have determined that invasive lionfish populations will keep expanding and cannot be controlled by traditional means.

Thus, They are predators that eat tiny crustaceans and juvenile fish, including snapper and grouper, two important commercial fish species.

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B. methylcyclopentane

F. propane

G. n-pentane are the following molecules would a flame ionization detector (FID) be sensitive to after separation on a gas chromatography column.

flame ionization detector(FID) The most used detector in gas chromatography is the flame ionization detector . Since practically all organic molecules include carbon atoms (C), the FID is sensitive to and capable of identifying them. As nitrogen, the primary component of air, won't burn under these circumstances, and chromatography the technology is also insensitive to moisture and carbon dioxide, hydrocarbons in the environment can be found using flame ionization detector (FID).

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For a solar eclipse to occur, the moon must be directly between Earth and the sun.

A solar eclipse occurs when the moon gets between Earth and the sun, and the moon casts a shadow over Earth.

A solar eclipse takes place only at the phase of new moon, when the moon passes directly between the sun and Earth and its shadows fall upon Earth's surface.

Hence, option B is the correct answer.

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Answer:

Increase the particle size of a reactant

Explanation:

Let me rewrite this question. I am assuming that it should be as follows,

If you  _____ the particle size of a reactant then the reaction rate will increase because of the reactant's surface area is exposed allowing more particles to make contact with each other.

And, here we are being asked to fill this dash line _____

It could only be that the particle size increases or decreases. Increasing the size of the reactant will increase the chance of collisions if the container with which the reactants are kept are constant. This would increase the reaction rate - thus _____ = increases.

Answer: decrease, more

Explanation: i just did it