concrete contributes ______% of the annual anthropogenic global co2 production.

The intermolecular forces affect the shape of a drop because a sphere has the smallest feasible surface vicinity for a given volume.

The intermolecular appealing interactions among water molecules reason the droplet to undertake a round shape. This maximizes the wide variety of appealing interactions and minimizes the wide variety of water molecules on the floor. Surface tension: Liquids with more potent intermolecular forces generally tend to have better surface anxiety than people with susceptible intermolecular forces. For example, in case you pour a totally small quantity of water on a table, it's going to generally tend to acquire collectively in a single huge drop.

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Answer:

no dont worry its in decimal point

anything after the point is considered as not to the fullest

Answer:

proactively develop ROE as well as responding to requests for additional ROE measures

Explanation:

The rules of engagement (roe) working group is a group who's main job is to  proactively develop ROE as well as responding to requests for additional ROE measures. Rules of Engagement are a set or rules or directives for military soldiers that define the circumstances, conditions, degree, and manner in which the use of force can be used.

Answer:

Pressure for N₂ = 0.456 atm

Explanation:

There is law for gases which states that the sum of partial pressures of each gas in a mixture, is equal to the total pressure of the system.

For this case, we have a mixture of He, Ne and N₂

Then Total pressure is 0.898 atm

He's pressure + Ne's pressure + N₂'s pressure = 0.898 atm

N₂'s pressure = 0.898 atm - 0.336 atm - 0.106 atm

Pressure for N₂ = 0.456 atm

This is called the Dalton's law of partial pressures.

Answer:

C. Mass extinctions

Explanation:

Mass extinctions happen because of climate change, asteroid impacts, massive volcanic eruptions or a combination of these causes. ... This event seems to be the combination of massive volcanic eruptions (the Deccan Traps) and the fall of a big meteorite.

2 moles of solute dissolved in 1 liter of solution has the greatest concentration.

Concentration refers to the quantity of solute that is dissolved in a specific amount of solution, and it is commonly measured in units such as moles per liter or grams per liter.

To determine which solution has the greatest concentration, we need to calculate the number of moles of solute present in each solution and then compare the values.

a. Concentration = 2 moles / 1 liter = 2 M

b. Concentration = 0.3 moles / 0.6 liters = 0.5 M

c. Concentration = 2 moles / 10 liters = 0.2 M

d. Concentration = 0.1 moles / 0.5 liters = 0.2 M

Comparing the concentrations, we see that solution (a) has the greatest concentration of 2 M, while the other solutions have concentrations of 0.5 M or lower.

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Metallic elements exist in a solid-state and they are opaque, have a shiny surface, good conductors of electricity and heat, malleable and ductile, and are dense. The structure of metals is formed by atoms that are held together by metallic bonds. These atoms have loosely bound valence electrons that can be shared between the neighboring atoms.

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Answer:

Option (2)

Explanation:

Since the amount of each sample is the same, we are looking for the metal with the greatest density, which is copper.

The excitation of electrons in the light reactions of photosynthesis generates energy for two key processes:

a) the synthesis of ATP  

d) the reduction of \(NADP^{+}\) to NADPH.

During the light reactions of photosynthesis, light energy is absorbed by chlorophyll molecules in the thylakoid membranes of chloroplasts. This excites the electrons within the chlorophyll molecules, initiating a series of electron transfer reactions. The primary outcome of these electron transfers is the generation of energy-rich molecules ATP (adenosine triphosphate) and NADPH (nicotinamide adenine dinucleotide phosphate).

a) The excitation of electrons drives the synthesis of ATP through a process called photophosphorylation. As the excited electrons move through the electron transport chain, they release energy that is utilized by ATP synthase to convert ADP (adenosine diphosphate) and inorganic phosphate (\(P_{i}\)) into ATP.

d) The excitation of electrons also leads to the reduction of \(NADP^{+}\) to NADPH. The energized electrons are passed through a series of electron carriers and eventually transferred to \(NADP^{+}\), along with protons (\(H^{+}\)). This reduction reaction converts \(NADP^{+}\) into NADPH, which acts as a high-energy electron carrier used in the subsequent dark reactions (Calvin cycle) to fix carbon dioxide and synthesize carbohydrates.

Thus, the excitation of electrons in the light reactions of photosynthesis provides energy for the synthesis of ATP through photophosphorylation and the reduction of \(NADP^{+}\) to NADPH. These energy-rich molecules are crucial for powering the subsequent dark reactions and the fixation of carbon dioxide to produce carbohydrates.

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Answer:

ExplaAt high temperatures MgCO3 decomposes to magnesium oxide and carbon dioxide. This process is important in the production of magnesium oxide. This process is called calcining: MgCO3 → MgO + CO2 (ΔH = +118 kJ/mol)

nation:

The isotope effect refers to the change in the rate of a chemical reaction caused by the substitution of one isotope for another in one of the reactants.

In the diatomic molecule HBr, the isotope effect can be evaluated by comparing the rate of the reaction between hydrogen and bromine to the rate of the reaction between deuterium and bromine, where deuterium is a heavy isotope of hydrogen.

The isotope effect can be calculated using the equation:

kH/kD = √(mD/mH)

where kH is the rate constant for the reaction with hydrogen,

kD is the rate constant for the reaction with deuterium,

mH is the mass of hydrogen,

and mD is the mass of deuterium.

In the case of the HBr molecule, the isotope effect can be evaluated by comparing the rate of the reaction between HBr and H2 with the rate of the reaction between HBr and D2.

The equation for this comparison is:

kH/kD = √(mD/mH) = √(2/1) = √2

This means that the rate of the reaction between HBr and H2 is approximately 1.4 times faster than the rate of the reaction between HBr and D2, due to the isotope effect caused by the substitution of deuterium for hydrogen.

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Answer:

help with what? Let me know in the comments! :)

Explanation:

The net ionic equation for potassium fluoride and ammonium chloride is

NH_4^++F^-(aq)--->NH_3(aq)+HF(aq)

Generally, The net ionic equation can simply be defined as a chemical equation that records solely those species experiencing the reaction.

Therefore,  net ionic equation for potassium fluoride and ammonium chloride

NH_4Cl(aq) and KF(aq) are both salys

Therefore, the ionic equation excludes them and is

NH_4^++F^-(aq)--->NH_3(aq)+HF(aq)

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Transition metals are much stronger and denser than alkali metals and alkaline earth metals and it is located between group 2 and group 3 of the periodic table.

Alkali metals and alkaline earth metals form ions with a +1 charge while the transition metals can form ions with variable charges. The transition metals are much harder, stronger and denser. They have much higher melting points . The transition metals are much less reactive. The alkali metals react with water, oxygen and halogens while the transition metals either react very slowly or do not react at all. A group 1 of the periodic table that is alkali metal will tarnish in the presence of oxygen as a metal oxide is formed. When cut with a knife the shiny appearance of the metal disappears in seconds as it is covered by the dull metal oxide.

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Connecting a zinc rod to an iron pipe offers advantages in protecting the iron surface from corrosion. The zinc acts as a sacrificial anode, corroding in place of the iron and providing uniform and extended protection to the entire iron pipe.

Connecting a zinc rod to an iron pipe is advantageous to protect the iron (Fe) surface from undergoing corrosion. This process is known as cathodic protection, where the zinc acts as a sacrificial anode. Here's the justification for this answer:

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Answer:

2a) 15 g/dm3

2b) 0.512 g/dm3

Explanation:

Use the concentration = mass/volume equation.

The reactant that must be present for a reaction to be classified as combustion is Option C- O2​.

What is a combustion reaction?

A combustion reaction is a type of exothermic reaction in which a substance reacts quickly with oxygen gas, generating heat and often light in the process. Combustion is the act of burning, and it usually requires heat.

Combustion is a type of chemical reaction that occurs between oxygen and a fuel source when it is heated to its ignition temperature. A typical combustion reaction is one in which a hydrocarbon reacts with oxygen to produce carbon dioxide and water vapor.

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According to the claim, one benefit of food processing is its capacity to lessen the growth of dangerous germs, which in turn prolongs the shelf life of food.

Thus, Extended Shelf Life: Perishable goods can have their shelf lives extended by using food processing procedures like canning, freezing, or adding preservatives. Customers may now preserve and enjoy these items for longer periods of time without worrying about them going bad.

Improved Food Safety: Food processing aids in lowering the risk of foodborne illnesses by employing chemicals and processing techniques that stop the growth of dangerous germs.

Thus, According to the claim, one benefit of food processing is its capacity to lessen the growth of dangerous germs, which in turn prolongs the shelf life of food.

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Answer: bases

Explanation:

Because a chemical reaction is nothing more than an atom rearrangement, a chemical equation must be balanced. In the course of a chemical reaction, atoms are neither created nor destroyed.

For the law of conservation of mass to apply, the chemical reaction  must be balanced. In the form of symbols and scientific formulas, a chemical equation is a symbolic representation of a chemical reaction. On the left side are the entities that make up the reactants, and on the right side are the entities that make up the products. Atom is a plus sign between the entities that make up the reactants and the products, and the arrow pointing in the direction of the products indicates the direction of the reaction. The tiniest component of ordinary matter, an atom, makes up a chemical element.

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Explanation:

Nuclear transmutation is the conversion of one chemical element or an isotope into another chemical element.

Explanation:

nuclear decay reaction, also called radioactive decay, an unstable nucleus emits radiation and is transformed into the nucleus of one or more other elements. ... Nuclear decay reactions occur spontaneously under all conditions, whereas nuclear transmutation reactions are induced.Sep 5, 2021

We must first determine how many moles of Mg(OH)2 are in the solution in order to determine its molarity:

Compute Mg(OH)2's molar mass:

mol Mg = 24.31 g

O = 15.99 g/mol

H = 1.01 g/mol

Mg(OH)2 has a molar mass of 24.31 plus 2(15.99) plus 2(1.01), or 58.33 g/mol.

Determine how many moles of Mg(OH)2 there are:

Mass / molar mass = number of moles

1.925 moles are obtained by multiplying 112.3 g by 58.33 g/mol.

Determine the solution's molarity:

Molarity is equal to the moles of solute per litre of solution.

Molarity = 1.925 moles/1.2 litres = 1.60 M

As a result, the molarity of the solution created by combining 1.2 L of water with 112.3 g of Mg(OH)2 is 1.60 M.

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Answer:

0.450037

Explanation:

Divide kPa by 101.325 as that is 1 atmospheric.

Hope that helps

Answer:

One atmosphere is equal to 101.33 kilopascal

So to change 45.6 kPa to atm, you would divide it by 101.33 kPa

\(\frac{45.6}{101.33} = 0.45 \ atm\)

0.45 atmospheres

Answer:

1. A

2. C

Explanation:

For the first question, we know that the water transformed into a gas. This fact eliminates choices C and D, primarily because they describe the change as "gas to liquid" instead of liquid to gas.

What separates B from A is that B is saying the liquid changed to a gas in response to sunlight, which is completely false and impertinent to the prompt.

A is the correct answer.

for the second question, we know that condensation causes clouds -- and that neither evaporation nor water vapor would clear clouds to make more of them, which eliminates choices B and D. Going back to condensation, the accumulation of water vapor plays a big role in the formation of clouds. While evaporation does play a part in [it] as well, condensation is what caused the sudden appearance of clouds in the troposphere.

C is the correct answer.

Glycinate donates an electron pair so it is a bidentate ligand.

The molecular formula is C₂H₄NO₂⁻. The octahedral complex is formed between glycinate molecules and cobalt(III) and the stoichiometry of the complex is [Co(gly)₃]. The reaction is as follows;

Co₃⁺(aq) + 3C₂H₄NO₂⁻ ⇒ [Co(C₂H₄NO₂⁻](aq)

A cobalt complex is formed when 3 glycinate ions equivalents react with one Co₃⁺ ion equivalent so, it is necessary to keep the glycinate ions concentration greater than the cobalt(III) ions at least three times more.

So, taking the concentration 4 times greater can facilitate the reaction.

For a complex whose concentration is 0.015M, 0.06M glycinate ions are required to obtain the desired cobalt(III) glycinate complex.

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Answer:

B Genetic diversity

Explanation:

Answer:

I think the answer is b.

Explanation:

:)

Answer:

The statement means that in every interaction, there is a pair of forces acting on the two interacting objects. The size of the forces on the first object equals the size of the force on the second object. The direction of the force on the first object is opposite to the direction of the force on the second object. Forces always come in pairs - equal and opposite action-reaction force pairs. 

Explanation:

The statement means that in every interaction, there is a pair of forces acting on the two interacting objects. The size of the forces on the first object equals the size of the force on the second object. The direction of the force on the first object is opposite to the direction of the force on the second object. Forces always come in pairs - equal and opposite action-reaction force pairs. 

answer; the last two is me and u :

Based on the mass ratio, the mass of H₂ produced is 3.51 g of H₂

The mass ratio of a reaction is the ratio of the masses of the reactants as well as as products in a balanced equation of a reaction.

The equation of the reaction is given below;

2 AI + 6 HCI → 2 AICI₃ + 3 H₂

From the reaction equation, 2 * 27 g of Al produces 3 * 2 g of H₂

32.25 g of Al will produce: 6/55 * 32.25 g of H₂

Therefore, mass of H₂ produced is 3.51 g of H₂

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Answer:

From the reaction equation, 2 * 27 g of Al produces 3 * 2 g of H₂

32.25 g of Al will produce: 6/55 * 32.25 g of H₂

Therefore, mass of H₂ produced is 3.51 g of H₂

Explanation: