. determine the molarity of the solution containing 1.5 mol of naoh in 1000 mltotal volume of solution.

Answer:

CH4+2O2→CO2+2H2O 

Explanation:

CH4+2O2→CO2+2H2O 

The formal charge on the C in  is 0.

In order to determine the formal charge on the carbon atom in , we need to consider the arrangement of electrons and bonds in the molecule. The Lewis structure for  is one carbon atom (C) bonded to two oxygen atoms (O). In the structure, there is a double bond between the carbon atom and one oxygen atom, while the other oxygen atom is bonded to the carbon atom by a single bond.

To calculate the formal charge on an atom, we use the formula: Formal Charge = Valence Electrons - Lone Pair Electrons - 0.5 * Bonding Electrons.

The carbon atom in  has four valence electrons. In the Lewis structure, the carbon atom is involved in two bonds and has no lone pair electrons. The carbon-oxygen double bond consists of four electrons (two bonding electrons and two lone pair electrons on the oxygen atom). The carbon-oxygen single bond consists of two electrons.

Plugging these values into the formula, we get: Formal Charge = 4 - 0 - 0.5 * (4 + 2) = 4 - 0 - 3 = 1.

Therefore, the formal charge on the carbon atom (C) in  is +1.

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Answer:

the answer is the swecond option

Explanation:

Its b ur well come

Answer:

balanced plz give correct question

Answer:

Iron (Fe)

Explanation:

# of protons is the atomic number of the element

the element with the atomic number 26 is Iron

with 26 electrons this means it is Iron with no charge

with 30 neutrons this means the atomic weight will be

26 (protons) + 30 (neutrons) = 56

the real atomic weight of iron listed on the periodic table is 55.845, this rounded up is 56.

Narrative form or storytelling is used to convey events, experiences, or information. In a narrative form, a single atom of Nitrogen, in the form of Nitrogen gas (N2) travels through different pools. The description of each pool it passes through as a source or a sink is given below:

In the atmosphere:Nitrogen gas is the most abundant gas in the atmosphere, it comprises about 78% of the earth's atmosphere. It is a component of many organic and inorganic compounds in the atmosphere.In the biosphere:Nitrogen-fixing bacteria or lightning can convert nitrogen gas into ammonia. This ammonia can be converted into nitrite and then nitrate through nitrification. This nitrate can be taken up by plants and utilized to make proteins and other molecules that are important for life.

Animals that consume these plants get the nitrogen that they need to build their own proteins. When an organism dies, decomposers like bacteria break down the proteins and return the nitrogen back to the soil in the form of ammonia and other organic compounds.In the atmosphere:Denitrification is the process that converts nitrate to nitrogen gas, which is then released into the atmosphere. This can be done by anaerobic bacteria and other microbes that live in soils and other places where there is little or no oxygen. Human activities that influence the movement of Nitrogen:Humans have a significant impact on the movement of nitrogen in the environment. One of the ways in which they do this is through the use of fertilizers, which contain high levels of nitrogen. These fertilizers can be washed into rivers and streams, where they can cause eutrophication.

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Answer:

it's a chemical Element

Explanation:

symbol He

atomic number 2.

H2O is composed of two hydrogen atoms and one oxygen atom. The central oxygen atom is sp3 hybridized.

H2O is composed of two hydrogen atoms and one oxygen atom. The oxygen atom is bonded to the two hydrogen atoms at a dihedral angle of 104°. There are two lone pairs on the oxygen atom. The molecule has a bent geometry.

The structure of H2O is shown in the image attached to this answer. The central oxygen atom is sp3 hybridized and the shape of the molecule is based on a tetrahedron owing to its electron pair geometry.

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The molar mass of the compound is 128.4 g/mol.

The empirical formula is an empirical formula that represents the lowest whole-number ratio of the atoms present in a compound. The empirical formula for the molecular compound is calculated using the percentage composition of the elements present in the compound. The steps used to find the empirical formula are as follows:

Find the mass of each element present in the compound.Convert each mass to moles.Divide each mole value by the smallest number of moles.Round to the nearest whole number and write the subscripts.The molar mass is the mass of a substance that contains 6.02 × 10²³ atoms or molecules. To calculate the molar mass of a compound, add the masses of all the atoms present in the compound.

C=0.707g,12.01 g/mol=0.0588 molCnH=0.2372 =1.01g/m=0.235 mol H

nH=4nC

The empirical formula of the compound is CH4. The molar mass of the compound can be calculated using the empirical formula.

M=12.01 g/mol+4(1.01 g/mol)=16.05 g/mol

The molar mass of the compound is 8 times the empirical mass, so the actual molar mass is;

M=8(16.05{g/mol})=128.4g/mol. The molar mass of the compound is 128.4 g/mol.

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Answer:

2.76 gram

Explanation:

2AI + 6HCl → 2AlCl3 + 3H2

Answer

Al +2 HCl - AlCl2 + H2

The Bohr model allows finding the energy range of each series and finding the results for the questions that are:

Bohr's atomic model describes very well the spectrum of Hydrogen in this model, the energy of the levels is

    Eₙ = -13.606  \(\frac{1}{n^2}\)  [eV]

    with n = 1, 2, 3, ...

Where Eₙ is the level energy, n is the whole number, the quantity in brackets is the units of the energy.

A transition occurs when an electron goes from a higher energy level to a lower level,

   ΔE = 13.606  \(( \frac{1}{n_i^2} - \frac{1}{n_f^2} ) \ \ n_i < n_f\))

Depending on the level reached, there are different energy values, from previous empirical studies these levels and their close series  have different names, see table.

Name serie     Final state   Characteristics

  Lyman                    1               Ultra violet

  Balmer                   2              Visible

 Paschen                  3             Infra red

In the most common activities, the observation method is sight, as the human eye can only perceive the visible range of the electromagnetism spectrum, we could not carry out the experiment for the other two series.

The change that must be made is to change the detection means, use a silicon diode that can see radiation from 200 nm to 1100 nm, that is, it is capable of perceiving the Ultraviolet, the visible and the infrared, the output in this case in en form of a voltage amplitude.

In conclusion, using the Bohr model we can find the energy range for each series and find the results for the questions that are:

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False, Atoms are not charge-neutral and some have permanent dipole moments(1).False, Molecules are not always charge neutral and can have permanent dipole moments(2).

Both atoms and molecules have some charge because of the electrons.

The atoms themselves have no net charge, but the electrons are negatively charged. In other words, atoms are charge-neutral but their electrons are not.

Furthermore, atoms can have permanent dipole moments as well. For instance, a molecule of HCl has a permanent dipole moment because chlorine has a higher electronegativity than hydrogen, which means that the shared electron pair is drawn closer to the chlorine than to the hydrogen.Molecules can also have a charge imbalance or permanent dipole moment.

When the molecule has an uneven distribution of charge, it becomes polar. A permanent dipole moment exists when the electrons within a covalent bond are not equally shared between the atoms.

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According to the given statement Most radioactive element have more proton than neutron.

For instance, the Earth's crust naturally contains the radioactive elements uranium and thorium. These two elements progressively alter their forms over millions of years, leading to the production of decay byproducts like radon and radium. Energy is released during this process. Alpha radiation is one type of this energy.

By monitoring the activity of the relevant radioisotopes, it is possible to identify naturally occurring radioactive materials. When it comes to radioactive materials with brief half-lives, these measurements are very useful. Despite being the most ionizing, alpha particles have a relatively shallow penetration depth; they cannot reach the skin's higher layers.

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Answer

F) The pressure of a gas exerted on the walls of its container is inversely proportional to the volume of the gas when the temperature of the gas remains constant.

Explanation

Boyle's law states that the volume of a given mass of gas varies inversely with the pressure when the temperature is kept constant. An inverse relationship is described in this way. As one variable increases in value, the other variable decreases. He discovered that doubling the pressure of an enclosed sample of gas, while keeping its temperature constant, caused the volume of the gas to be reduced by half.

Answer:

Melting

Explanation:

The phase change from a solid to a liquid is called melting, also known as fusion. During this phase change, the substance absorbs heat energy, which causes the particles in the solid to vibrate more and overcome the attractive forces holding them in a fixed position. As a result, the particles gain enough energy to break their bonds and move freely, causing the solid to become a liquid. The temperature at which this phase change occurs is known as the melting point, and it varies depending on the substance.

All 435 members of the United States House of Representatives are up for re-election in each election cycle, which occurs every two years.

This means that every seat in the House of Representatives is up for grabs in the regular congressional elections that are held in November of even-numbered years. Each state is divided into congressional districts based on population, and each district elects one representative to serve in the House.

The terms of representatives are two years long, so all representatives must run for re-election every two years if they wish to continue serving in the House.

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Answer:

C.) 4.85 x 10⁻¹⁹ J

Explanation:

To find the energy, you need to use the following equation:

E = hc / w

In this formula,

-----> E = energy (J)

-----> h = Planck's Constant (6.626 x 10⁻³⁴ J*s)

-----> c = speed of light (3.00 x 10⁸ m/s)

-----> w = wavelength (m)

Once you have converted nanometers to meters, you can plug the given values into the equation and solve.

410 nm                1 m
-------------  x  ----------------------  =  4.10 x 10⁻⁷ m
                        1 x 10⁹ nm

E = hc / w

E = (6.626 x 10⁻³⁴ J*s)(3.00 x 10⁸ m/s) / (4.10 x 10⁻⁷ m)

E = 4.85 x 10⁻¹⁹ J

Answer:

122 gm

Explanation:

54 days is 2 half lives :    ( 27 * 2 = 54)

  1/2   * 1/2 = 1/4 will be left

      1/4 * 488 = 122 gm

Answer:

Chemical reactions happen when two or more molecules interact and the molecules change.

Explanation:

Bonds between atoms are broken and created to form new molecules. That's it.

// have a great day //

The reason a mole of carbon dioxide (CO2) extracted from air weighs slightly more than 44.01 grams is due to the presence of the isotopes of carbon, specifically carbon-13 (13C) and carbon-14 (14C), which have slightly higher atomic masses than carbon-12 (12C).

In nature, carbon exists as a mixture of these isotopes, with carbon-12 being the most abundant. The atomic mass of carbon reported on the periodic table is an average of the masses of these isotopes, taking into account their relative abundances. Since carbon-13 and carbon-14 have higher masses, they contribute to the overall molecular weight of carbon dioxide.

When carbon dioxide is extracted from air, it contains a small proportion of carbon-13 and carbon-14 isotopes. These isotopes, although present in much smaller quantities compared to carbon-12, contribute to a slightly higher molecular weight for a mole of carbon dioxide. This is why the actual weight of a mole of extracted carbon dioxide is slightly greater than the calculated molecular weight of 44.01 grams.

It is worth noting that the difference in weight due to the isotopic composition is relatively small and does not significantly impact most practical applications. However, for precise measurements or certain scientific studies, isotopic composition and its effect on molecular weight may need to be considered.

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Explanation:

At 4th point the slump block is located

hope this helps you

have a great day :)

It is point 2, for anyone who sees this is the future

Answer:

Ionization energy decreases from top to bottom in groups as the size of the atom becomes larger. For example, the first ionization energy of hydrogen is 1310 kJ mol⁻¹. The first ionization energy of lithium is 519 kJ mol⁻¹. Because lithium is a bigger atom and has more protons than hydrogen, its ionization energy is lower. So, in groups, the lower the ionization energy, the larger the atom and the more protons/electrons it has.

Ionization energy also increases from left to right across a period. The more protons in the nucleus, the greater the attraction between the nucleus and the electrons, which makes it more difficult to remove electrons. Helium has an ionization energy of 2370 kJ mol⁻¹ while hydrogen has an ionization energy of 1310 kJ mol⁻¹ because helium's nucleus has 2 protons attracting electrons instead of 1 like hydrogen. So for periods, the higher the ionization energy, the smaller the atom and the more protons/electrons it has.

Ionization energy is the energy required to remove an electron from its orbital around an atom. It increases across a period because the number of protons in the nucleus increases. This creates a stronger attraction between the nucleus and electrons, causing the electrons to be held tighter by the higher nuclear charge. Because the electrons are more difficult to remove, more energy is required which causes the ionization energy to be higher. So for periods, the more electrons the atom has, the higher the ionization energy. Ionization energy decreases down a group because the first electron removed is farther from the nucleus as the number of protons increases. Being farther away from the nucleus makes it easier for the electron to be pulled off as it is more loosely bounded, so less energy is required to remove the electron which causes the ionization energy to be lower. So for groups, the more electrons the atom has, the lower the ionization energy.

Groups are vertical columns going down on the periodic table. If you look at a periodic table, across the top, you will see the numbers 1-18. Those numbers signify the 18 groups of the periodic table. Iodine is a halogen so it is under Group 17 to the far right of the periodic table.

I attached two periodic tables for reference to everything that I've said as I've written a lot. Hope that helps.

Answer:

(CH3COO)2 + redP + Cl2 → ClCH2COOH + HCl

Explanation:

This is an example of halogenation of carboxylic acids at alpha carbon atom. In this reaction, red phosphorus and chlorine are treated with carboxylic acids having alpha hydrogen atom followed by hydrolysis to form alpha chloro carboxylic acid.

Answer:

Explanation:

The new volume can be found by using the formula for Boyle's law which is

\(P_1V_1 = P_2V_2\)

From the question we have

\(V_2 = \frac{P_1V_1}{P_2} \\\)

From the question we have

\(V_2 = \frac{40 \times 20}{80} = \frac{800}{80} = 10 \\ \)

We have the final answer as

hope this helps you

Answer:

3

Explanation:

Answer:

Explanation:

NaCl – Sodium chloride

Other names: {{unbulleted list Saltb Table salt

Appearance: Colorless cubic crystals

CaS – Calcium sulfide

Other names: Calcium monosulfide

Hepar calcies Sulfurated lime

If a mixture of solid nickel(ii) oxide and 0. 16000 m carbon monoxide is allowed to come to equilibrium at 1500 k , the equilibrium concentration of CO₂ will be 0.15996M

The equillibrium concentration can be calculate as follows:

First we should write the reaction

NiO(s) + CO(g) ⇆ Ni(s) + CO₂(g)

kc is defined as product concentration / reactant concentration, so:

kc = [CO₂] / [CO] = 4.0x10³

As we know  concentration of CO is 0.18M, so the concentrations in equilibrium will be:

[CO] = 0.16000M - x

[CO₂] = x

and we can substitute the value to the equillibrium equation

kc = [CO₂] / [CO]

4.0x10³ = x / (0.16000-x)

640 - 4000x = x

640 = 4001x

x = 0.15996

Therefore, concentrations CO₂ in equilibrium are:

[CO] = 0.16000M - 0.15996 = 4.0x10⁻⁵

[CO₂] = x = 0.15996M

Your question is incomplete but most probably your full question was

Consider the reaction: ; Kc=4.0×10³ at 1500 K.

If a mixture of solid nickel(ii) oxide and 0. 16000 m carbon monoxide is allowed to come to equilibrium at 1500 k , what will be the equilibrium concentration of CO₂

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The net absorbance with freeze-thaw treatment is 0.316, and that with 25°C treatment is 0.025.

Beet root segments were exposed to freeze-thaw treatment for 30 minutes and yielded absorbance values of 0.351, 0.301, and 0.297 at 470 nm. To obtain the net absorbance, these values were averaged, resulting in 0.316. Another set of segments exposed to 25°C for 30 minutes yielded a net average absorbance of 0.025 at 470 nm.

This shows that the freeze-thaw treatment caused more damage to the cells and resulted in a higher release of pigments than the 25°C treatment. The absorbance values obtained can be used to compare the effectiveness of different treatments on the release of pigments from cells.

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