What is responsible for the force that makes up an ionic bond?

Answer:

6.94 mol

Explanation:

Data given:

Mass of iron filings (Fe) = 388.3 g

no. of moles of iron (Fe) = ?

Solution:

For this formula will be used

       no. of moles = Mass in grams/ molar mass

molar mass of Fe = 56 g/mol

Put values in equation

                no. of moles = 388.3 g / 56 g/mol

                no. of moles = 6.94 mol

So,

no. of moles of iron in jar = 6.94 mol

The jar contains approximately 6.95 moles of iron.

The number of moles of a substance can be calculated using the formula:

moles = mass / molar mass

In this case, the mass of iron filings is given as 388.3 g. The molar mass of iron is 55.845 g/mol. By substituting these values into the formula, we get:

moles = 388.3 g / 55.845 g/mol = 6.95 mol

Therefore, the jar contains approximately 6.95 moles of iron.

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Answer

Cl2+2KI ➡ 2KCl + I2 is an example of redox reaction.

Explanation

While Iodine is being oxidized.

Oxidation addition of electronegative elements such as Chlorine or increase in oxidation number. Reduction, addition of electropositive elements such as Potassium metal or decrease in oxidation number.

Explanation:

Concentration of solution  

It is the amount  of solute present in given amount of solution .

There are different methods to know about the concentration of solutions .

out of it mass or volume percentage and parts per million is one of the methods .

Mass Percentage

it is calculated by taking the ration of mass of solute  to mass of solution x 100.

That is:

Mass percentage = mass of solute/mass of solution x 100

Parts per million (ppm )

It is calculated by taking the ratio of  number of parts of solute /number of parts of solution x 10⁶.

This method is preferred only when concentration of solute is very less like  used in case to measure amount of pollutants in air .It is an efficient method than percentage method in that case .

Answer:

Concentrations like the ones shown in the graph are relatively small. Writing them as percentages would require decimal points and many leading zeros. Therefore, scientists choose ppm over percentages to show CO2 concentrations.

Explanation:

Answer:

When used properly (it should always be diluted with water before use), chlorine bleach is safe for disinfecting surfaces. It kills harmful germs and bacteria and sanitizes clothes in the laundry.

Answer:

bleach

Explanation:

sodiam hydrochlorite

The answer for 1/0.00032 in standard scientific notation is 3.125 * 10^3.

Explanation:

For conversion of the given number in scientific notation follow

a * 10^b

The steps to see how 3,125  written in scientific notation as follows.

Step 1

To find a, The number is moved right to one decimal place.

Original Number: 3,125

New Number: 3.125

Step 2

Now, to find b, Find the decimal count on the right side.

New Number: 3 .1 2 5

Decimal Count:       1 2 3

There are three places found.

Step 3

Now we can reconstruct the number into scientific notation.

The Scientific notation is: a x 10^b

a = 3.125

b = 3

Now writing the whole thing:

3.125 x 10^3

Step 4

Check your work:

10^3 = 1,000 x 3.125 = 3,125.

Answer: 34,918 g NI3

Explanation: solution attached:

Use the relationship of 1 mole NI3 is equal to its molar mass 395 g NI3

88.4 moles NI3 x 395 g NI3 / 1 mole NI3

= 34,918 g NI3

Answer:

The last region should be right

Explanation:

Answer:

share

Explanation:

Answer:

Here are all of the answers for the page you are on

12.N - Atomic mass: 14.007 Atomic number: 7   outermost: 2P - Atomic mass: 30.974 Atomic number: 15 outermost: 3 As - Atomic mass: 74.922 Atomic number: 33 outermost: 4Sb - Atomic mass: 121.757 Atomic number: 51 outermost: 513.Mercury- Hg, 12, 6Iodine- 1, 7, 5Sodium- Na, 1, 3Nitrogen- N, 5, 214.K- potassium, metalSi- silicon, metallidS- Sulfur, nonmetal15.The Moseley chart was based on using the atomic mnumber of the element, not the chemical properties. Because of the similarities between elements of the same period, this often created problems in establishing an order; Moseley's work enabled the change of the atomic number from an arbitrary selection to a definable property, measurable through experimentation.

Explanation:

12.N - Atomic mass: 14.007 Atomic number: 7   outermost: 2P - Atomic mass: 30.974 Atomic number: 15 outermost: 3 As - Atomic mass: 74.922 Atomic number: 33 outermost: 4Sb - Atomic mass: 121.757 Atomic number: 51 outermost: 513.Mercury- Hg, 12, 6Iodine- 1, 7, 5Sodium- Na, 1, 3Nitrogen- N, 5, 214.K- potassium, metalSi- silicon, metallidS- Sulfur, nonmetal15.The Moseley chart was based on using the atomic mnumber of the element, not the chemical properties. Because of the similarities between elements of the same period, this often created problems in establishing an order; Moseley's work enabled the change of the atomic number from an arbitrary selection to a definable property, measurable through experimentation.

The chart used by Moseley was more accurate at predicting where new elements would be placed - due to fact that Moseley's chart was based on using the atomic number of the element, not the chemical properties or the atomic mass as Mendeleev.

Mendeleev's table had organized the elements by their atomic mass whereas Moseley's table had organized the elements by their atomic number.

Thus, due to fact that Moseley's chart was based on using the atomic number of the element, not the chemical properties or the atomic mass as Mendeleev.

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Final answer:

A scientist questioning the energy mechanisms in newly discovered methanogenic bacteria might focus on metabolic pathways and evolutionary adaptations. Observations of motility in stab cultures and the isolation of penicillin by Alexander Fleming demonstrate the importance of empirical observation in microbiology.

Explanation:

When a scientist discovers a new bacterial species that is a methanogen, to better understand the evolution of mechanisms related to the capturing, storing, and using free energy in prokaryotes, the scientist might ask: "How does this methanogenic bacteria capture, store, and utilize free energy compared to other prokaryotes?" This question aims to investigate the metabolic pathways and energy transformation mechanisms that enable the bacteria to produce methane. It also allows for a broader comprehension of evolutionary processes and adaptation strategies among prokaryotes.

Concerning motility, observations in a stab culture could indicate bacterial motility if the bacteria have migrated away from the line of inoculation, suggesting that they might move by mechanisms such as flagella or cilia. An investigation to determine which household item has the most bacteria would involve swabbing the surfaces, culturing the collected samples, and then counting the colonies to compare the levels of bacterial presence. Hypotheses in this experiment would be based on the expected bacterial load of each item, and the results could validate or refute these suppositions.

Furthermore, Alexander Fleming's discovery of penicillin involved observing a zone of inhibition around a Penicillium mold in a culture of bacteria, which led him to theorize that the mold produced a substance lethal to the bacteria—leading to the isolation of penicillin.

Answer:

11.43g of Aluminum Hydroxide

Explanation:

Since we know that the sulfuric acid is the limiting reactant in this chemical reaction, we know that we are going to be left with excess aluminum hydroxide. So to find the amount of leftover aluminum hydroxide we are going to need to convert the given amount of sulfuric acid to the amount of aluminum hydroxide needed to react with the sulfuric acid.

[tex]\frac{35g H_{2}SO_{4}}{1}*\frac{1 mole H_{2}SO_{4}}{98.079 g H_{2}SO_{4}} *\frac{2 moles Al(OH)_{3} }{3 moles H_{2}SO_{4}} * \frac{78.003 g Al(OH)_{3} }{1 mole Al(OH)_{3} } = 18.557 g Al(OH)_{3}[/tex]

Once you do that, you need to subtract that number from the amount of aluminum hydroxide given to get the amount of left over aluminum hydroxide.

[tex]30 g Al(OH)_{3} - 18.557 g Al(OH)_{3} = 11.43 g Al(OH)_{3}[/tex]

Hope this helps!

Answer:

C the breaking down of rock

Answer: option C. the breaking down of rock

Explanation: weathering is the breaking down of rock by the action of rain, temperatures and biological activities.

Explanation:

cogeneration prodeuces electricity from steam and uses steam in other chemical reactions simultaneously.

Answer:

It’s heat

Explanation:

1.61 mol, Al acting as a limiting reactant, and an excess of HBr

3.22 mol of Al in moles

4.96 mol of HBr is one mole.

Moles of H2O generated =?

What is the excess reactant? What is the limiting reactant?

Chemical formula:

A + B + H₂ = 2AlBr + H

We shall now contrast the moles:

              Al:   H

                 Step 2:

                In 3.22: 1/2×3.22 = 1.61 mol

               HBr: H₃

                Step 2:

               2.48 mol is equal to 1/2×4.96 in this case.      

Since Al produces fewer moles of H3 than HBr, it will operate as a limiting reactant when HBr is present in excess.

Moles of H₂:

1.61 mol of H2 is the number of moles.

Answer:

They are in same group/family.

Explanation:

Alkaline earth metals are present in group 2 of periodic table. There are six elements in second group. Beryllium, magnesium, calcium, strontium, barium and radium.

All have two valance electrons but in different energy levels. Thus they have similar chemical properties.

Electronic configuration of calcium.

Ca = [Ar] 4s²

Electronic configuration of strontium.

Sr = [Kr] 5s²

They are present in group two and have same number of valance electrons (two valance electrons) and show oxidation state +2 by loosing two valance electrons. They also show similar reactivity.

They react with oxygen and form oxide.

2Sr  +   O₂   →    2SrO

2Ca +   O₂   →    2CaO

this oxide form hydroxide when react with water,

SrO  + H₂O   →  Sr(OH)₂

CaO  + H₂O   →  Ca(OH)₂

With sulfur,

Sr + S   →  SrS

Ca + S   →  CaS

Answer:

                     Empirical Formula  =  CH

                    Molecular Formula =  C₆H₆

Explanation:

                   The structure of benzene is attached.

It can be easily seen from the structure of benzene that it contains six carbon atoms and six hydrogen atoms. Therefore, one should remember that the structure formula is made up of molecular formula as it contains and show the exact number of atoms. Hence, we can finalize the molecular formula as C₆H₆ on the basis of inspecting the structure formula.

Secondly, the empirical formula is calculated from the molecular formula. It does not depend upon the structure formula of a compound. As empirical formula is the simplest positive integer ratio of atoms present in a compound hence for benzene we can calculate this formula as CH because the simplest ratio of 6:6 is 1:1.

Answer:

The solubility of the organic amide product in the solvent hexane is 0.0403 moles/L at 0° C

Explanation:

When 2.85gm dissolved in 20ml of boiling solvent

After re crystallization 2.62gm was obtained

so, that the dissolved amount at 0° C is

2.85 - 2.62

= 0.23 gm in 20ml hexane

Mole of amide [tex]= \frac{0.23}{285.34} moles[/tex]

Solubility [tex]= \frac{0.23}{285.34} \times \frac{1000}{20}[/tex]

               = 0.0403 moles/L

Therefore, the solubility of the organic amide product in the solvent hexane is 0.0403 moles/L at 0° C

Answer:

Bond are the strong forces that holds two atoms Together in a molecule.

Explanation:

Some properties of bonds are as follow:

1. There are three types of bonds : ionic , covalent , coordinate

2. Ionic bonds are formed by transfer of electron form one atom to other. These bonds are very strong because they are formed by electrostatic force of attraction between opposite charges.

The ionic Bonds have very high lattice energy.

due to ionic bond , ionic compound have very high melting point ,boiling point, conductivity in melt state etc.

3. Covalent bonds : These bonds are formed by the sharing of electron .They are weaker than ionic bonds. The melting point  and electrical conductivity of covalent compounds are lower than ionic bonds.

Why do elements combine to  form bond?

They do so to get stability in order to complete their octet.

Answer:

The question is incomplete.(not enough data provided).

Explanation:

Answer:

5.82 ×10⁴ j

Explanation:

Given data:

Mass of water = 25.7 g

Amount of heat to evaporate it = ?

Molar heat of vaporization = 4.07×10⁴ j/mol

Solution:

First of all we will calculate the number of moles of water.

Number of moles = mass/ molar mass

Number of moles = 25.7 g/ 18 g/mol

Number of moles = 1.43 mol

Energy needed for one mole is 4.07×10⁴ j.

For 1.43 mol:

1.43 mol × 4.07×10⁴ j/ 1mol

5.82 ×10⁴ j

Answer:

Molar mass of acetic acid = 60 g/mol

Explanation:

Molar mass of any compound is the sum of the atomic masses of all the atoms of elements present in it.

Molar mass of acetic acid:

Formula:

CH₃COOH

Atomic mass of carbon = 12 g/mol

Atomic mass of hydrogen = 1 g/mol

Atomic mass of oxygen = 16 g/mol

Molar mass of acetic acid = 12×2 + 1 × 4 + 16× 2

Molar mass of acetic acid = 60 g/mol

Answer:

Sound energy is the form of energy generated when an object vibrates. Once produced through vibrations, sound energy is transferred in waves through mediums such as air and water before it reaches your ears.

Sound energy is a type of energy associated with the vibration of matter and its transmission from a source. It involves both kinetic and potential energy, traveling in periodic waves causing simple harmonic motions in atoms. It is perceived through hearing.

Sound energy represents a type of energy associated with the vibration of matter. It emerges as a result of a disturbance of matter transmitted from the source outward. The atoms undergoing this disturbance are typically more organized than their thermal motions.

Sound energy involves the movement of particles, thus, combining both kinetic and potential energy. This movement is due to the elasticity of the material in which the sound is propagating. It's essential to note that sound energy travel in waves, more specifically, periodic waves, causing atoms to undergo simple harmonic motions.

The perception of sound energy is what we often refer to as hearing. Just as sight is the perception of visible light, hearing is how we interpret the energy carried by sound waves.

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Answer:

            Cl⁻ is the reducing agent.

Explanation:

The redox reaction is as follow:

                    MnO₂  + 4H⁺ + 2Cl⁻   →   Mn²⁺ + 2H₂O + Cl₂

One should know the following terms,

Reducing agent:

                          An atom or element which tends to lose electron during a chemical reaction and get itself oxidized. In above reaction Cl⁻ is reducing agent as it carries a negative charge (means it has one extra electron) on the reactant side while, it has zero oxidation state on the product side. It means going from -1 to 0 the Cl lost one electron hence, it is an reducing agent according to definition.

Oxidizing Agent:

On the other hand oxidizing agent is an element or compound which tends to accepts electron(s) and get itself reduced. In above reaction Mn has an oxidation state of +4 on reactant side and after gaining electron from Cl it has changed to +2 on the product side. Hence, it has reduced but has oxidized the Cl atom so it is an oxidizing agent according to definition.

Answer:

P = 559.553 mmHg

Explanation:

Clasius-Clapeyron:

∴ P1 = 23.8 mmHg = 3.173 KPa

∴ T1 = 25°C ≅ 298 K

∴ ΔHv = 40.657 KJ/mol

∴ R = 8.314 E-3 KJ/K.mol

∴ T2 = 96°C ≅ 369 K

⇒ Ln P2/P1 = - (40.657 KJ/mol/8.314 E-3 KJ/K,mol) [(1/369 K) - (1/298 K) ]

⇒ Ln P2/P1 = - (4890.185 K) [ - 6.457 E-4 K-1 ]

⇒ Ln P2/P1 = 3.1575

⇒ P2/P1 = 23.511

⇒ P2 = (23.511)(3.173 KPa)

⇒ P2 = 74.601 KPa = 559.553 mmHg

Answer:0.102 milliliters is required

Explanation:

The easy way to obtain this is to take unit conversation very important as diphenhydramine has a molar mass of 255.355grams per mole and the concentration of the liquid diphenhydramine is 12.5 milligrams per 5 milliliters.

We have to convert the molar mass into milligrams per mole by dividing by 1000 which yields 0.255355mg/mol then;

Simplify the molar mass divided by the concentration of the liquid diphenhydramine;

0.255355/12.5/5

This equals 0.102 milliliters!

Without the specific dosage, we cannot give a specific amount of milliliters. However, if we knew the dosage, we could use a proportion to calculate the corresponding milliliters. For example, a dosage of 25 mg would result in an administration of 10 mL.

The question seems to be missing the specific dosage that should be given to the child. However, if we knew the specific dosage, we could calculate the milliliters of diphenhydramine to be administered using a proportion. For example, if the dosage was 25 mg, we would use the information that 12.5 mg corresponds to 5 mL to set up the equation: 12.5 mg/5 mL = 25 mg/x mL. Cross multiplying gives the equation 12.5x = 125, so x = 10 mL would be the appropriate dosage.

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Protons, neutrons, and electrons are subatomic particles that makeup atoms. Protons carry a positive charge, neutrons are neutral, and electrons carry a negative charge. The atom's actual mass might not equate to the sum of its subatomic particles due to the mass defect.

The subatomic particles you are referring to are protons, electrons, and neutrons, which are the building blocks of atoms. A proton has a mass of 1.0073 amu and a charge of 1+. A neutron is a slightly heavier particle with a mass of 1.0087 amu and a charge of zero, hence its name suggesting neutrality. The electron has a charge of 1- and is much lighter with a mass of about 0.00055 amu. Interestingly, the sum of an atom's subatomic particles does not equate to the atom's actual mass. This missing mass is known as the mass defect.

Subatomic particles also include neutrinos and other particles produced in accelerator experiments. Protons, electrons, and a few other particles, such as quarks, may be fundamental building blocks, but the substructure of quarks and electrons may be smaller than is presently observable.

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When one s- and one p-orbital mix, the resulting hybrid orbitals have a Linear geometry

Explanation:

To produce two similar sp hybrid orbitals the process of combining the valence s orbital with one of the valence p orbitals that are situated in a linear geometry is termed as hybridization method. When atoms are arrayed in a vertical line supporting 180° angle then the molecule is referred to as  Linear molecule.

Carbon dioxide (O=C=O) is the most common sample to explain the linear electron set and molecular geometry. In which there exists a pair of electrons and none lone pairs present. It is accordingly linear in electron-group geometry. The repellent forces depreciate the linear adjustment

Answer:

linear

trigonal planar

tetrahedral

Explanation:

Al2(SO4)3 + 3Ca(OH)2 -> 2Al(OH)3 + 3Ca(SO)4

Al[tex]_2[/tex](SO[tex]_4[/tex])[tex]_3[/tex]+ 3Ca(OH)[tex]_2[/tex] [tex]\rightarrow[/tex] 2Al(OH)[tex]_3[/tex]+ 3Ca(SO)[tex]_4[/tex] is the balanced equation. An imbalanced chemical equation describes the products and reactants of a chemical reaction.

A balanced equation is indeed a chemical reaction equation in which the overall charge and the amount of atoms for every element inside the reaction are the same for both the products and the reactants. In those other words, the mass plus charge on both side of the reaction are balanced.

An imbalanced chemical equation describes the products and reactants of a chemical reaction yet does not include the quantities needed to meet mass conservation. The balanced equation for the given reaction is Al[tex]_2[/tex](SO[tex]_4[/tex])[tex]_3[/tex]+ 3Ca(OH)[tex]_2[/tex] [tex]\rightarrow[/tex] 2Al(OH)[tex]_3[/tex]+ 3Ca(SO)[tex]_4[/tex].

Therefore, Al[tex]_2[/tex](SO[tex]_4[/tex])[tex]_3[/tex]+ 3Ca(OH)[tex]_2[/tex] [tex]\rightarrow[/tex] 2Al(OH)[tex]_3[/tex]+ 3Ca(SO)[tex]_4[/tex] is the balanced equation.

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The kind of seismic waves travel through the earth are Congressional longitudinal waves and shear transverse waves.

Explanation:

Answer:

It would be Body waves

Explanation:

There are two main types of waves, body and surface. Since surface waves can only move along the earths surface like water ripples. The answer would be body waves since it travels through earths inner layer