What change would make the model of the atom more accurate?

The oxidation state of sulfur in SOCl2 is the same as the oxidation state of sulfur in SO3-2.

To calculate the oxidation state of a particular atom in a polyatomic compound, we need to add the oxidation states of all the elements and put them equal to the charge present on the compound.

The oxidation state of oxygen is generally taken to be -2.

In case of SO3-2, the oxidation state of sulphur is S + 3(-2) = -2, S = +4

Similarly, in the case of the other compounds , the oxidation state of sulfur can be calculated as,

S2O3-2, 2S + 3(-2) = -2, S = +2

SO4-2, S + 4(-2) = -2, S = +6

H2S, S + 2 = 0, S= -2

SOCl2, S + (-2) + (-2) = 0, S = +4

Of all the compounds mentioned above, only SOCl2 has the same oxidation state as sulfur as SO3-2.

Hence, the oxidation state of sulfur in SOCl2 is the same as the oxidation state of sulfur in SO3-2.

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Any reaction that has a catalyst added to it has its activation energy reduced, accelerating the rate of the reaction. Although it doesn't initiate the reaction, it lowers the energy needed to do so. Furthermore, doing so causes the catalyzed reactions to produce an intermediate product.

The catalyst's properties are the key idea used to address this question. The molecules known as catalysts have a strong tendency to alter the rate of a reaction. It should be noted that the catalyst itself does not change significantly.

A catalyst accelerates both the forward and backward reactions at a faster rate. It also lowers the activation energy for both forward and backward reaction.

Without a catalyst, the reaction would speed up in any direction. However, a catalyst can never increase the rate of a reaction in both directions at the same time—neither forward nor backward. A catalyst lowers the activation energies of both forward and backward reactions, causing them to accelerate in the desired direction.

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[tex]H_3[/tex]CОНС = acetaldehyde  also known as  ethanal ( It is a carbonyl compound)

НC[tex]H_3[/tex] = methane ( it is a hydrocarbon of alkane group)

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Density of liquids is more than that of gases. Thus, the correct answer is (a).

A liquid has molecules that are closely spaced out. As a result, liquids have a higher density than gases.

The mass of a material per unit of volume is its density. Density is most frequently represented by the symbol ρ, but Latin letter D may also be used.

The amount of items in a space—which might include humans, animals, plants, or objects—is referred to as the space's density. Divide the number of items by the area's measurement to determine density. A country's population density is calculated by dividing its total population by its area, expressed in square kilometres or miles.

In comparison to liquids and gases, solids are denser than liquids and gases, respectively. The solid's particles are close to one another and have very little room to move. In a liquid, the particles are often still in contact, although there are gaps between them. There are considerable gaps between the gas particles.

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Answer: Isotope

Explanation: It's an isotope because isotopes are atoms with the same number of protons but different neutrons. Ions are atoms have different number of electrons and it wouldn't be a different element because the atom still has the same number of protons.

Yucca Mountain, Nevada is a potentially viable site for nuclear waste disposal because it is an arid desert with very less precipitation and minimal contamination due to the nuclear waste.

Yucca Mountain, Nevada is a wide stretch of 160 km of dry desert with very little rainfall.  This area is mainly composed of dense volcanic rock which contains minute pores which make the process of rainwater infiltration very slow and restricting.

Also, the nuclear waste will be stored in such a way that it is far above the water bodies of the mountain. This way the threat of water contamination is also out of question.

These all factors would effectively protect the waste and prevent the leak of harmful radioactive radiation from the disposal storage.

That being the case, Yucca Mountain, Nevada is a potentially viable site for nuclear waste disposal.

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Select the product or products formed by the proton transfer reaction that occurs when these two substances interact: Arrhenius acids.

Communication between two or more computer applications is made possible via application programming interfaces (APIs). It is a kind of software interface that provides a service to other software. An API specification is a document or a standard that outlines how to create or use a connection or interface of this type. The term "implement" or "expose" refers to a computer system that conforms to this standard. A specification or an implementation may both be referred to as an API.

An application programming interface, as opposed to a user interface, links computer systems to people, while a user interface does the opposite.

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The mass of cesium in 30,84 g of compound  will be  14.92 g. It can be calculated by the mass of Iodine and Cesium which are combining to form the compound.

Weight of metal which is cesium=65.40g

Weight of non metal which is Iodine= 69.75g

Weight of compound= 135.15g

135.15  g of compound contains 65.40 g of cesium

Therefore,

135.15 g of compound= 65.40 g of cesium

1 g of compound = 65.40/ 135.15 g of cesium

=0.4839g of cesium

30.84 g of compound contains 0.4839× 30.84 g of cesium

=14.92 g of cesium.

So , by using equality and proportion method, weight of cesium will be calculated as 14.92 g.

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The values are not precise but they are accurate because they are all close to the true value of 8.9 g/mL.

The density of a solid refers to the ratio of the mass to the volume of the object. This ratio is an intrinsic property because we could use it to identify a substance. In this case, the density of a substance can tell us exactly what the substance is.

Now let us try to obtain the density of the object in each case;

Case 1 = 38.951/56.5 - 52.0 = 8.7 g/mL

Case 2 = 43.830/56.1 - 51.2 = 9.1 g/mL

Case 3 = 41.418/ 57.1 - 52.4 = 8.8 g/mL

It is clear that the values are not precise but they are accurate because they are all close to the true value of 8.9 g/mL.

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The bed pushes his feet up

Answer:

The reaction is the weight force of the boy

The mass of Al₂S₃ in kg required is 2815.28 kg

The percentage mass of a substance is the ratio of the substance in a given substance to that of the total mass of the substance expressed as  a percentage.

The percentage mass of aluminum in Al₂S₃ is calculated as follows:

Molar mass of Al = 27 f

Molar mass of Al₂S₃ = 150 g/mol

Percentage mass of Al = 27/150 * 100%

Percentage mass of Al = 18%

Mass of Al₂S₃ required is calculated with the formula:

Mass of Al₂S₃ = mass of Al * 100/percentage mass of Al

Mass of Al₂S₃ = 506.75 * 100/18

Mass of Al₂S₃ = 2815.28 kg

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Answer:

It will kill them or harm them

Explanation:

Epsom salt works as a natural safe pesticide for ants and can kill them depending on how u use it.

The Balanced equation is:

[tex]2Al(NO_3)_3 (aq) + 3Na_2S (aq) \rightarrow Al_2S_3 (s) + 6NaNO_3 (aq)[/tex]

A chemical reaction that has a balanced equation is one in which the total charge and the number of atoms in each of the components, for both the products and the reactants, are exactly equal. Simply said, each side of the reaction process has an equal mass and charge.

A chemically balanced equation is a symbolic representation of a chemical reaction that consists of symbols and formulas, in which a + sign separates the entities in both the reactant and product lists on the left and right, respectively, products and the reactants and an arrow pointing in the direction of the products to indicate the reaction's direction. The critical values of the stoichiometric numbers are shown as coefficients alongside the symbols and formulas of the entities.

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Ionic bonds are formed between K and Br due to losing and gaining of electrons.

Ionic bond is the bond formed between two elements due to the gaining and losing of electrons by the one member and acceptance by the other member.

Usually the metal atom loses electron and the non-metal gains electron.

Ionic bond is formed between Potassium (K) and Bromine (Br). Potassium loses electron to form  K⁺ and Bromine gains electron to form Br⁻ .

Potassium Bromide (KBr) is formed due to formation of K⁺ and Br⁻ after the addition of electron is Br and losing of electron by K atom.

Potassium Bromide can be Electrolysed into the constituent ions on addition of water due to its nature as a strong electrolyte.

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Answer:

47.867 U

Explanation:

The average atomic mass of titanium is calculated by taking the weighted average of the atomic masses of its stable isotopes. Simply put, each isotope i will contribute to the average atomic mass of the element in proportion to its decimal abundance, which is simply the percent abundance divided by 100 .

The empirical formula of the compound is CHO.

The empirical formula is the formula that shows the ratio of each of the atoms in the compound. Let us now look at the relative percentages of each of the elements and divide them by the relative atomic masses of each of the elements.

C - 40/12,  H - 4.57/1,  O -  54.4/16

C - 3.33,  H- 4.57, O - 3.40

Dividing through by the lowest ratio;

C - 3.33/3.33,  H- 4.57/3.33, O - 3.40//3.33

C - 1, H - 1, O - 1

The empirical formula of the compound is CHO.

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Answer:

Hydrogen = colourless, odourless, extremely flammable

Lithium = lowest density, reacts with water, high specific heat

Oxygen = nonpolar, reactive, tasteless

Helium = low boiling point, low density, low solubility

Nitrogen = odorless, colorless, nonflammable

The central atom of ICl2- has three lone pairs in the Lewis structure.

Lewis structures, also known as Lewis dot formulas, Lewis dot structures, electron dot structures, or Lewis electron dot structures (LEDs), are diagrams that show the covalent bonds that connect atoms in a molecule as well as any lone electron pairs that may be present. Any covalently bonded molecule, as well as coordination compounds, can be given a Lewis structure. Gilbert N. Lewis, who proposed the Lewis structure in his 1916 article The Atom and the Molecule, was named after it. Lewis structures extend the concept of the electron dot diagram by drawing lines between atoms to represent shared pairs in a chemical bond.

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Atoms in a metallic substance are held together by a force called the metallic bond.

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The second option Al, Si, I, Au contain halogen that is Iodine (I).

Thus, second option contain halogen.

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1600 - 1850 cm-1 wavenumber corresponds to the C=O double bond region on an IR spectrum.

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The coefficients needed to balance the equation for the complete combustion of methane are 1,2,1 and 2 for methane, oxygen, carbon dioxide, and water respectively.

The equation becomes The equation becomes: CH₄ (g) + 2O₂ (g) -> CO₂ (g) + 2H₂0 (g)

Burning any hydrocarbon element in the presence of O (oxygen) to give CO2 along with light and heat is called a combustion reaction.

Without enough oxygen, the combustion process will be incomplete. To equalize the chemical reaction equation, we need to use variables. Here are a few steps:

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The dipole for PBr3 is shown in the attachment. PBr3 has non xero dipole moment because bromine atoms can not cancel out dipole moment of each other.

The three bromine atoms in this molecule do not cancel out the dipole moment of each other and molecule shows net dipole moment.it shows that PBr3 is a polar molecule.the partially positive charge surrounded by phosphorus atom and partially negative charged surrounded by bromine atom.

Dipole moment is used to define the symmetry of molecules. PBr3 has the trigonal pyramidal structure. bromine atom has more electronegative value than phosphorus.

Thus, the dipole moment in PBr3 is non zero due to unequal charge distribution.

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Hydroxide ion concentration - 0.0094 M. The concentration of hydrogen ions is more conveniently expressed as pH, The logarithm of the reciprocal of the concentration of hydrogen ions in gram moles per liter.

The acid-base reaction equation is as follows:

HCl + NaOH ---> NaCl + H₂O

stoichiometry of HCl to NaOH is 1:1

number of HCl moles - 0.16 mol/L x 0.200 L = 0.032 mol

number of NaOH moles - 0.091 mol/L x 0.300 L = 0.0273 mol

The limiting reactant is NaOH therefore the number of HCl moles reacted - 0.0273 mol

the excess amount of HCl moles is - 0.032 - 0.0273 = 0.0047 mol

since HCl is a strong acid

total volume - 200 mL + 300 mL = 500 mL

[HCl] = [H⁺]

therefore [H⁺] = 0.0047 mol / 0.500 mL

[H⁺] = 0.0094 mol/L

hydroxide ion concentration - 0.0094 M

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Answer:

yes

Carbon dioxide is produced whenever an acid reacts with a carbonate.

Explanation:

How to make carbon dioxide -

You can make CO2 by adding 1 tablespoon of white vinegar and 1 heaping teaspoon of baking soda in a glass. This safe chemical reaction creates water and CO2.

Formula -

The chemical formula for carbon dioxide is CO2. 

The conversion factors which are needed to convert from um to km is 1,000,000um = 1m.

A conversion factor is defined as a number which is used to convert one set of units to another set of units, by multiplying or dividing by integer or rational number. When a conversion is essential, the appropriate conversion factor in an equal value should be used.

For example, for the convertion of inches to feet, the conversion value which is used to convert is 12 inches equal 1 foot.

Now, as we know that, 1km = 1000m.

It can be concluded that we know how to convert kilometre to metre.

So, we need the conversion factor to convert um to km.

Therefore, we need 1,000,000um = 1 m which is needed to convert um to km.

Thus, we concluded that the conversion factors which are needed to convert from um to km is 1,000,000um = 1m.

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The answer is ppm that is parts per million.

This stands for "parts per million" and can also be written as mg/L (milligrams per liter). The mass of a chemical or contamination per volume of water is the unit of measurement here. On a lab report, ppm or mg/L both mean the same thing. The solution makes up 0.0001 percent of 1 PPM. It is equivalent to 1 mg in other measures like milligrams per kilogram, milligrams per liter of water, etc. Additionally, it is the 1/1,000,000th of something. PPM stands for one (1/,000,000) (defect or incident). Previously, suppliers were deemed to be of high quality if their failure rate was less than 10,000 PPM, or 1%.

The complete question is- A Lake Contains 0.05 Mg PO 2-/L (Orthophosphate). What Is the Concentration Expressed In:

A. Ppm

B. M (Molar)

C. Mg PO-P/L

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The electronic configuration of in a strontium atom is similar to the arrangement of electrons in a calcium atom as they have same number of valence electrons, 2.

The electronic configuration of in a strontium atom is different from the arrangement of electrons in a calcium atom as they have different number of electron shell electrons, which is 4 and 5 respectively.

Electronic configuration of atoms refers to the arrangement of the electrons in an atom in orbits or shells around the nucleus of the atom of the element.

Electronic configuration of atoms of elements forms the basis of the arrangement of the periodic tale into groups and periods.

Elements that have the same number of electrons in their valence or outermost shell are found in the same group and elements that have the same number of electron shells are found in the same period.

Comparing the electronic configuration of calcium and strontium as follows below:

Electronic configuration of calcium  is 1s²2s²2p⁶3s²3p⁶4s²

Electronic configuration of strontium  is 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s²

Calcium and strontium have the same number of outermost shell electrons, which is 2. Therefore, they belong to same group.

Calcium and strontium have the different number of electron shell electrons, which is 4 and 5 respectively. Therefore, they belong to different periods.

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