what is Metallic bond

Burning biodiesel derived from plant oils generally does not contribute to an increase in carbon dioxide in the atmosphere. Thus, the atmospheric CO₂ concentration stays the same.

Burning biodiesel derived from plant oils generally leads to a decrease in the atmospheric CO₂ concentration compared to burning fossil fuels derived from drilling for oil. This is because the carbon released during burning was recently taken in by the plants as they grew, so the amount of carbon in the atmosphere remains relatively constant.

Biodiesel is made from renewable sources, like plant oils, which absorb CO₂ from the atmosphere during their growth. When burned, the biodiesel releases the CO₂ back into the atmosphere, creating a more balanced carbon cycle.

In contrast, burning fossil fuels derived from drilling for oil releases carbon that has been trapped in the earth for millions of years, leading to an increase in atmospheric carbon dioxide concentration. Burning fossil fuels introduces additional CO₂ into the atmosphere, which was previously stored underground, leading to an increase in atmospheric CO₂ concentration. Therefore, burning biodiesel is generally considered to have a lower carbon footprint than burning fossil fuels.

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Answer:

The answer is option A

Colorful feathers

Hope this helps you

The correct answer to the question is d - H2O.The molecule among the given choices is H2O, which is represented by option d. A molecule is a group of atoms that are chemically bonded together.

In this case, H2O represents two hydrogen atoms (H) chemically bonded to one oxygen atom (O), forming a water molecule. On the other hand, ca, c, na, and mg represent individual atoms of calcium, carbon, sodium, and magnesium, respectively. While these atoms may chemically bond with other atoms, they do not represent a molecule by themselves. Therefore, the correct answer to the question is d - H2O.

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Answer:

The mixture contains two or more substances mixed, but neither chemically as well as not in inexact quantity while compound includes two or more elements combined chemically and in a fixed ratio. Pure substances are made up of elements and compounds

Hope this helps!

Answer:

4

Explanation:

bc Ca is 1 C is one L is two

Answer:

1, just I) color.

Explanation:

Physical properties are the properties that can be observed without changing the composition of a substance, such as color, temperature, density, and boiling point.

A physical change is a change in the substance that only modifies its aggregation state, such as solidification, and boiling.

Chemical properties are the properties that need a reaction to being observed, such as combustibility, which needs a combustion reaction to being quantified.

When a chemical reaction occurs, and the composition of the substance change, it's a chemical change.

So, heating copper with carbon is a chemical reaction, and purification by electrolysis is too. Color is the only physical property.

Answer:

Uhmm i think i dont know the sent r 6un Dury r in eyeing in d7ue

Bar graph is the best type of graph to use if you are trying to compare quantities for four separate options that are not related to the dependent or independent variables and that are not measured over time.

Bar graphs are the type of graph that can be used when the data measurement between different variable are not continuous or not measured over time.

The advantages of bar graphs include the following:

Therefore, Bar graph is the best type of graph to use if you are trying to compare quantities for four separate options that are not related to the dependent or independent variables and that are not measured over time.

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Answer: 1.14 M

Explanation:

500 mL is equal to 0.5 L.

So, the molarity is (0.570)/(0.5) = 1.14 M

A 7.5 10-3 M Ba(OH)2 solutions at 25°C has a pH of 1.82. (option b).

A homogenous solution of two or more ingredients with particles smaller than one nm is referred to as a solution. Solutions come in many forms, such as soda water, salt and sugar solutions, etc. In a solution, every element appears as a single phase.

In chemistry, a solution is a homogeneous mix of two or more molecules in relative proportions that can be constantly changed up to what is known as the limit of solubility. Although the term "solution" is frequently used to refer to the liquid state of matter, solutions of gases and solids are also possible.

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Answer: C

Explanation:

Don’t trust the other person it’s not A

*view photo for answer*

pay attention! the answer choices aren't always in the same order!

299.7g of H2O will be produced.

1st) With the balanced chemical equation and the molar mass of CH4 and H2O, we can calculate the amount of H2O that is produced by stoichiometry:

- CH4 molar mass: 16g/mol

- H2O molar mass: 18g/mol

According to the balanced equation, 16g of CH4 will produce 36g of H2O (2 x 18g).

2nd) Now, with a mathematical rule of three we can calculate the grams of water that will be produced from 133.2 grams of CH4:

Finally, 299.7g of H2O will be produced from 133.2 grams of CH4.

Answer:

6.022 x 10²³

Explanation:

602,200,000,000,000,000,000,000

start counting spots from right to left till you get 6.022

you counted 23 spots and that's the power of 10

finally 6.022 x10²³

Avogadro's number is the number of units in one mole of any given substance.

Answer: i think it is Habitat but i am not 100%

Explanation:

you have to drink a lot of water and 67890

Answer:

2Naci+Br2

Explanation:

i hope it is help full

Answer:

Na//Cl//Br

Explanation:

When filling a buret for a titration, first adjust the buret in the clamp so that it is vertical. Then, choose an appropriate funnel to add the titrant into the buret. The titrant should be filled to just above the zero mark on the buret, and the buret tip should be briefly opened to remove any bubbles.

After that, the buret can be adjusted to the desired volume and the titration can proceed. It is important to take note of the initial buret reading before starting the titration to ensure accurate measurement of the titrant volume.

When filling a buret for a titration, it is important to first adjust the buret in the clamp so that it is vertical and its tip is below eye level to ensure accurate volume measurements. Next, choose an appropriate method to add the titrant into the buret, such as using a funnel or a pipette.

It is important to avoid splashing or spilling the titrant to ensure accurate and precise measurements. The titrant should be filled above the zero mark on the buret and then slowly drained until the bottom of the meniscus is aligned with the zero mark.

This process is called "buret priming" and it helps to remove any air bubbles from the buret tip that can affect the accuracy of the measurements. Once the buret is primed and filled with the titrant, it is ready to be used for the titration.

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The toxic chemical compounds gift in the soil can lower soil fertility and therefore lower the soil yield.

chemical compounds such as lead can harm the anxiety system, inclusive of the mind. Contaminants may also be absorbed via the pores and skin. Creosote is a not unusual cloth used to hold timber in the USA. This complicated mixture of chemical compounds can leach out of treated wood and contaminate the soil.

Soil toxicities are constraints on the useful resources available to the crop. Toxicities in the subsoil seem to perform through restricting root boom, the most important outcome of which within the Australian environment is reduced yield because of reduced water availability to the crop (Dang et al., 2008).

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Option (D) is the final result, which rounds to the necessary number of significant numbers and equals 0.0676 M.

Since most reactions take place in solutions, it's critical to comprehend how the substance's concentration is expressed in a solution.

The balanced chemical equation for the reaction between formic acid and sodium hydroxide is:

HCO₂H + NaOH → NaHCO₂ + H₂O

From the equation, we see that 1 mole of formic acid reacts with 1 mole of sodium hydroxide.

We can use the volume and concentration of NaOH to determine the number of moles of NaOH used in the reaction:

moles of NaOH = (volume of NaOH) x (concentration of NaOH)

moles of NaOH = (29.80 mL) x (0.0567 mol/L)

moles of NaOH = 0.001689 mol

Since 1 mole of formic acid reacts with 1 mole of sodium hydroxide, the number of moles of formic acid in the solution is also 0.001689 mol.

We can use the volume of the formic acid solution to calculate its concentration (in units of M):

concentration of formic acid = (moles of formic acid) / (volume of formic acid in L)

concentration of formic acid = (0.001689 mol) / (0.02500 L)

concentration of formic acid = 0.06756 M

Rounding to the appropriate number of significant figures gives a final answer of 0.0676 M, which is option (D).

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Option (D) is the final result, which rounds to the necessary number of significant numbers and equals 0.0676 M.

Since most reactions take place in solutions, it's critical to comprehend how the substance's concentration is expressed in a solution.

The balanced chemical equation for the reaction between formic acid and sodium hydroxide is:

HCO₂H + NaOH → NaHCO₂ + H₂O

From the equation, we see that 1 mole of formic acid reacts with 1 mole of sodium hydroxide.

We can use the volume and concentration of NaOH to determine the number of moles of NaOH used in the reaction:

moles of NaOH = (volume of NaOH) x (concentration of NaOH)

moles of NaOH = (29.80 mL) x (0.0567 mol/L)

moles of NaOH = 0.001689 mol

Since 1 mole of formic acid reacts with 1 mole of sodium hydroxide, the number of moles of formic acid in the solution is also 0.001689 mol.

We can use the volume of the formic acid solution to calculate its concentration (in units of M):

concentration of formic acid = (moles of formic acid) / (volume of formic acid in L)

concentration of formic acid = (0.001689 mol) / (0.02500 L)

concentration of formic acid = 0.06756 M

Rounding to the appropriate number of significant figures gives a final answer of 0.0676 M, which is option (D).

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The solutions which can be separated  using distillation are that of alcohol, salt and sugar with water.

It is defined as a process by which components are separated from a mixture which is liquid  by selective boiling and condensation. Dry distillation is a process of heating solids to produce products in gaseous state.

Distillation results in complete  separation of components  or may be sometimes partial.Due to partial separation,concentration of selected components increases in the mixture. It exploits  differences in  relative volatility  of components of a mixture.

It has many applications like distillation of fermented products which produces distilled beverages , in desalination and in petroleum and oil industry.

It is mainly conversion of liquid into vapor state ,which is subsequently converted back to liquid . It is used to separate volatile liquid from solids and also volatile liquids and non-volatile liquid .

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Choosing the material with the highest specific heat capacity is ideal and true.

This is defined as the quantity of heat needed to raise the temperature per unit mass.

Insulators have a higher specific heat capacity as it takes more time for them to absorb heat thereby making it ideal in building an  insulated home.

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According to mole concept, 25 g sample of methyl alcohol  has 0.780  moles.

Mole is defined as the unit of amount of substance . It is the quantity measure of amount of substance of how many elementary particles are present in a given substance.

It is defined as exactly 6.022×10²³ elementary entities. The elementary entity can be a molecule, atom ion depending on the type of substance. Amount of elementary entities in a mole is called as Avogadro's number.

It is widely used in chemistry as a suitable way for expressing amounts of reactants and products.For the practical purposes, mass of one mole of compound in grams is approximately equal to mass of one molecule of compound measured in Daltons .Molar mass has units of gram per mole . In case of molecules, where molar mass  in grams present in one mole  of atoms is its atomic mass.

For the given problem, number of moles is calculated as, mass/molar mass

By substituting the respective values, 25/32.04=0.780 moles.

Hence, 25 g of methyl alcohol has 0.780 moles.

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The change will correctly effect the model of the electron transport system above simply is to switch H₂O and O₂ ( Water and oxygen ).

The correct answer choice is option c.

It happens that oxygen react with 2 different electrons from the transport chain and 2 hydrogen in order to produce water molecules in the process.

Electron transport chain simply refers to a protein complex redox reactions which result in the production of ATP molecules. In this whole process of forming ATP, the electrons in the chain carried by the NADH, FADH2 and H+· are transferred to oxygen atom.

In conclusion, for an effective change to occur in the above electron transport system, there needs to be a switch of water and oxygen molecules

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Answer :Switch H2O and O2.

Explanation: edgenuie 2022-23

Answer:

In a physical change the appearance or form of the matter changes but the kind of matter in the substance does not. However in a chemical change, the kind of matter changes and at least one new substance with new properties is formed. The distinction between physical and chemical change is not clear cut.

Answer: 2400 km

Explanation: 1200 km/hr • 2 hr = 2400 km

Condensation is a process of conversion of the gaseous phase into liquid phase whereas accretion is a process of accumulation of small particles into larger ones over a period of time.

Condensation is the process by which water vapor in the air is changed into liquid water it's generally the opposite of evaporation. Condensation is crucial to the water cycle because it is responsible for the formation of clouds.

Accretion is the accumulation of smaller particles into a massive object by gravitationally pulling more matter towards itself, typically gaseous matter, in an accretion process. Most astronomical objects, such as galaxies, stars, and planets, are formed by the same accretion processes itself.

Accretion from natural causes, that  adds soil, sand, and also other types of earth to the part of a person's property that generally borders water. While this occurs very slowly, a piece of property may grow a lot overtime and also may increase its value.

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Answer:

See explanation

Explanation:

The number of electrons in each principal energy shell increases as the number of shells increases because more electronic orbitals become available to accommodate the electrons.

For instance, the n= 2 level only accommodates eight electrons in the s and p orbitals whereas the n=3 level accommodates 18 electrons in s, p and d orbitals respectively.

Each principal level accommodates 2n^2 electrons where n= the principal energy shell.

The increase in the number of shell leads to increase in the number of electrons.

The number of electrons in each principal energy shell increase as the number of the shell increases because each cell can accommodate 8 electrons except the first shell which has only 2 electrons. The number of electrons increases when we go down the group due to addition of new shells.

The atom added new shells in the atom if the existing shells fill with electrons and no place is available for the remaining electrons so we can conclude that the increase in the number of shell leads to increase in the number of electrons.

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Option D is correct. It is independent of the reaction pathway.

Hesslaw states that the enthalpy change of a reaction does not change regardless whether the reaction takes place in a single or multiple reaction pathways.

This shows that the total entalpy change of a reaction does not depend on the reaction pathway.

The chemical formula for magnesium acetate is Mg(C2H3O2)2. This compound is made up of one magnesium ion (Mg2+) and two acetate ions (C2H3O2-). Magnesium acetate is a white crystalline solid that is used in the production of various chemicals and in the pharmaceutical industry.

The chemical formula for nickel (III)phosphide is Nip. This compound is made up of one nickel ion (Ni3+) and one phosphide ion (P3-). Nickel (III)phosphide is a black or dark gray powder that is used in various industrial applications, including as a catalyst for chemical reactions and in the production of electronic components. It's important to note that when writing chemical formulas, it's necessary to pay attention to the valence of each element and ion involved. In the case of magnesium acetate, the magnesium ion has a valence of +2, while the acetate ion has a valence of -1. In the case of nickel (III)phosphide, the nickel ion has a valence of +3, while the phosphide ion has a valence of -3.

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