A compound is formed by combining a polyatomic cation and a polyatomic anion. If the valency of the constituent elements, present in cation is three and one, then which of the following statement(s) is/are correct?

One/More Correct Answer(s)

A.

The compound can be ammonium sulphate

B. The molecular mass of the carbonate of this polyatomic cation can be 96 u

C. The metal present in the compound can be aluminium

D. Chemical formula of the compound can be (N*H_{4}) 2 SO 4

Viscosity of polystyrene is determined to know the size of polystyrene its compression, and molding capacity.

To obtain the perfect shape and size the configuration of polystyrene should be maintained under different conditions.

So, to deduce the confirmation of the polystyrene under viscosity determination  we can apply 2 methods;

1. By adding excess diluents to the polystyrene which reduces its viscosity.

2. By introducing or adding small linear chains by addition method to the molecular chains of polystyrene molecular structure to reduce chain entanglement.

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T-butyl chloride changes its ppt formed  and color more quickly with ague and an indicator than other chlorides do.

The hydrant A color shift was caused by the addition of AgNO3 when a product like Hl reacted with the acid-base indicator MethyL red. The released chloride ion was found by Agel precipitation at ambient temperature. Both a color change in an indicator and a precipitate format positively confirmed that the reactivity order in both cases is t-butyl chloride > n-butyl chloride. As a result, t-butyl chloride changes its ppt formed  and color more quickly with ague and an indicator than other chlorides do.

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It was discovered that the photosynthetic pigment in spinach best absorbed light between the wavelengths of 400 and 450 nm as well as at 650 nm. Additionally, it was discovered that this green phototroph barely absorbed light at wavelengths about 550 nm.

The logarithm of the ratio of incident to transmitted radiant power through a sample is known as absorbance. As an alternative, absorbance can be defined as "the negative logarithm of one minus absorptance, as measured on a homogeneous sample," for samples that scatter light.

The disks will rise as a result of bubbles developing on their surface when the leaves create oxygen. The leaves eventually sink if the cup's light source is taken away.

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29,322 milliliters of 0.155m hcl are needed to neutralize completely 45.0 ml of 0.101m ba(oh)2 solution Given that :

Hcl + Ba(oh)2 gives Bacl2 + 2h20

Molarity = mole of solute / volume of solution in liters

Molarity = 0.101 m

Volume = 45 ml

mole of solute (ba(0h)2) = Molarity * volume

                = 0.101 * 45 ml

                = 4.545

now we have to find the volume of hcl so,

again

molarity = mol solute/ volume of solution

volume of solution = mole solute / molarity

                                 = 4.545 / 0.155m

                                 = 29. 322 liters

                                 = 29,322 ml

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Explanation:

the answer was already on here

Answer:

Together, the number of protons and the number of neutrons determine an element’s mass number: mass number = protons + neutrons. If you want to calculate how many neutrons an atom has, you can simply subtract the number of protons, or atomic number, from the mass number. A property closely related to an atom’s mass number is its atomic mass.

Explanation:

The density of the material would be 1.75 gm/cc.

p = n'∑Ac + ∑AA/VcNA

= n'(∑Ac + ∑AA)/9³NA

=n'(∑Ac + ∑AA)/(2(rA + rX))³ NA

n' = number of atoms per unit cell

= 4(assumption)

rA = 0.137 × 10⁻⁷ cm

rX = 0.241 × 10⁻⁷ cm

NA = Avagadros number

= 6.022 × 10²³

∑Ac = Atomic weight of all cations

∑AA = Atomic weight of all anions

p = n'(∑Ac + ∑∑AA)/(2(rA + rx))³NA

= 4(22.7 + 91.4/(2(0.137 × 10⁻⁷ + 0.241 × 10⁻⁷))³ 6.022× 10²³

= 1.75 gm/cc

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When a piece of I2 in 50 ml of water is placed then another piece of I2  of the same mass in C6H14 is placed then hydrogen bonding is formed in water and a strong London dispersion force occurs.

C6H14 is a straight chain alkane with 6 carbon atoms with no double or triple bond.this is non polar. So, London dispersion forces exist.this is the force that exists between all molecule.this is the weakest intermolecular forces.the boiling point of C6H14 increases as their atomic mass increases due to stronger London dispersion force.

Water has strong intermolecular forces.in this,hydrogen bonding and dipole moment created by the strong electronegative oxygen and hydrogen.water has hydrogen bond,dipole induced dipole forces and London dispersion forces.

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P=183.65 atm is the pressure inside the tank for the given conditions.

How is the pressure calculated?

Given,

V=108 L

m=22700 gm

The formula is PV=nRT

moles= [tex]\frac{Mass}{Molar mass}[/tex]

∴moles of [tex]N_{2}[/tex] = [tex]\frac{22700}{28}[/tex]=810.78 moles.

R=0.082 [tex]\frac{L atm}{molK}[/tex]

T=27°C=300K

P=[tex]\frac{nRT}{V}[/tex]

[tex]P_{N_{2}[/tex]=[tex]\frac{810.71 X 0.0821 X 298}{108}[/tex]

P=183.65 atm

The ideal gas law (PV = nRT) connects the macroscopic characteristics of ideal gases. A gas is considered to be perfect if its particles (a) do not interact with one another and (b) occupy no space (have no volume).

PV = nRT

PV = nRT is the equation for an ideal gas. In this equation, P stands for the ideal gas's pressure, V for the ideal gas' volume, n for the total amount of the ideal gas expressed in moles, R for the universal gas constant, and T for temperature.

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The energy transfer in the form of light or heat is called radiant energy. Thus the flow of electric current can be called as radiant.

Radiation is a mod of energy transfer through vacuum and the electromagnetic radiations are such energy transfer from stars and space which hits the earth surface.

Sound is a mechanical wave only travels through a medium whereas electromagnetic waves does not need a medium to travel. Electromagnetic radiation is the combination of an electric field and magnetic field.

Hence, the flow of electric current by which the energy made available is called radiant.

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The pH of buffer solution obtained will be 7.05 by dissolving 29.029.0 g of kh2po4(s)kh2po4(s) and 44.044.0 g of na2hpo4(s)na2hpo4(s) in water and then diluting to 1.00 l.

This can be calculated using use Henderson - Hasselbalch equation:

PH = Pka + ㏒ [A/AH]

Molar mass of KH₂PO₄ =  136.0 g And Molar mass of Na₂HPO₄ =  142.0 g

No. of moles of H₂PO₄⁻ = No. of moles of KH₂PO₄ = (29..0 g) / (136.0 g/mol) = 0.213 mol

No. of moles of HPO₄²⁻ = No. of moles of Na₂HPO₄ = (44.0 g) / (142.0 g/mol) = 0.30 mol

In the solution, [HPO₄²⁻]/[H₂PO₄⁻] = 0.213/0.30

Henderson-Hasselbalch equation:

pH = pKₐ + log([HPO₄²⁻]/[H₂PO₄⁻])

pH = 7.21 + log(0.213/0.30)

pH = 7.05

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The electron dot structure of diatomic nitrogen is N≡N.

The electron dot structure of the nitrogen molecule is attached

The atomic number = 7

Chemical symbol = N

Type of bond = Triple bond

Group = 5A

Total number of valance electrons = 5

Lewis structure:

Therefore the electron dot structure is N≡N.

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Answer:

A planetary scientist who works at john hopskin university

Explanation:

Acid and Bases interact in water as they form Hydronium ion and hydroxide ions. The interaction for strong acids and weak acids produces salts.

Acid are those which have ability to dissociates into H⁺ ions.  ans the bases are those which have ability to produce OH⁻ ions. when we mix acid with water it produce hydronium ions.

HCl   +   H₂O ----->   H₃O⁺   +   Cl⁻

when we mix base with water it produced hydroxide ions.

NaOH   +   H₂O    ------>   Na⁺     +   OH⁻

The mixture of two acids of different will react together. while when two acids mix the reaction do not happen. when we mix weak acid with the strong acid it produces salt because  weak acid have higher pH which is basic.

Thus, Acid and Bases interact in water as they form Hydronium ion and hydroxide ions. The interaction for strong acids and weak acids produces salts.

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Partition coefficient Chloroform = 11.98, Diethyl Ether = 2.81 and Benzene = 1.05      

Chloroform would be the ideal solvent to use when extracting the chemical from an aqueous solution because it has the highest solubility.

A solution is a homogenous mixture of one or even more solutes in a solvent. Adding sugar cubes to a cup of tea or coffee is an example of a solution. A property that facilitates the dissolution of sugar molecules is solubility. Solubility is the property of a substance (solute) to dissolve in a particular solvent. A solute is any solid, liquid, or gaseous substance that dissolves in a solvent.    

The compound needs 2 grams of solvent to dissolve it.

Finding solubility

For water, 2g/90ml= 2.22

For chloroform, 2g/7.50= 26.6

For diethyl ether, 2g/32= 6.25

For benzene, 2g/85= 2.35

Partition Coefficients -

For chloroform = 11.98

For Diethyl Ether = 2.81

For Benzene = 1.05

As a result of its high solubility, chloroform would be used to extract a compound from an aqueous solution.

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The molarity of the acid is given, so the number of moles titrated can be calculated: 0.050 L × 6 mol/L = 0.3 moles of strong acid added thus ...

A strong acid-strong base titration is used to determine the concentration of an acidic solution by titrating it with a known concentration of a basic solution, or vice versa, until neutralisation occurs. Because both the acid and base are strong (high Ka and Kb values), they will fully dissociate, which means that all the molecules of acid or base will separate into ions. Equivalent amounts of H+ and OH- ions combine to form H2O at the equivalence point, resulting in a pH of 7.0. (neutral).

In aqueous solution, an acid that has been completely ionised. In contrast to a weak acid, when a strong acid is placed in a solution such as water, all of the strong acid dissociates into its ions. The general equation for strong acid dissociation is:

HA(aq)→H+(aq)+A−(aq)

The H stands for hydrogen, and the A stands for the acid's conjugate base (anion).

A base that is completely ionized in aqueous solution. This means when the strong base is placed in a solution such as water, all of the strong base will dissociate into its ions. The general equation of the dissociation of a strong base is:

XOH(aq)→X+(aq)+OH−(aq)

The OH represents hydroxide and the X represents the conjugate acid (cation) of the base.

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Answer:

30 degrees Celsius, is 86 Fahrenheit.

273 kelvin, is 31.73 Fahrenheit.

0 degrees Celsius, is 32 Fahrenheit.

Then 32 degrees Fahrenheit.

The correct answer choice is A. 30 degrees Celsius.

Silver is most likely the best conductor of heat according to the periodic table.

The most electrically conductive component is silver, taken after by copper and gold. Silver too has the most elevated warm conductivity of any component and the most noteworthy light reflectance.

The components can be classified as metals, nonmetals, or metalloids. The most electrically conductive component is silver, taken after by copper and gold. Silver too has the most elevated warm conductivity of any component and the most noteworthy light reflectance.

As to why silver is the most excellent conductor, the reply is that its electrons are more liberated to move than those of the other components.

This has got to do with its valence and gem structure. Most metals conduct power. Other components with tall electrical conductivity, are aluminum, zinc, nickel, press, and platinum. Brass and bronze are electrically conductive amalgams, instead of components.

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Based on the given specific heat capacity of iron, the molar heat capacity of iron =is 25.18 J/mol/°C.

The molar heat capacity of a substance is the amount of heat required to raise the temperature of a unit mole of that substance by one degree.

The molar heat capacity is given by the formula below:

Given the specific heat capacity of a substance, the molar heat capacity is obtained as follows

Molar heat capacity = specific heat capacity * molar mass

specific heat capacity of iron = 0.4498 J/g/°C

the molar mass of iron = 56 g/mol

Molar heat capacity of iron = 0.4498 J/g/°C * 56 g/mol

Molar heat capacity of iron = 25.18 J/mol/°C

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The gas after the calculation has a molar mass of 39.95g/mol which is that of Argon. The elemental symbol of gas is Ar.

We know that 1 mol of gas has 22.4L of any gas at STP.

Given in the question is the density of the gas 1.78g/l at STP.

Hence the mass of 22.4 L of the elemental gas at STP is its molar mass.

Hence molar mass

=22.4 l/mol × 1.7824 g/L

= 39.925g/mol

These gases are called noble gases because they are majestic in nature, which means they dont react with anything in general.

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102 nm wavelength of light is emitted when the electron in a hydrogen atom relaxes from n= 3 to n= 1

∆E = - Rh × ( 1/nf² - 1/ni² )

∆E = difference in energy between final and initial energy level (J )

R = Rydberg's constant

nf = final energy level

ni = initial energy level

nf = 3, ni = 1, Rh = 2.18 × 10-¹⁸

∆E = -2.18 × 10-¹⁸ ( 1/3² - 1/1² )

= 2.18 × 0.88 × 10-¹⁸ J

∆E = 1.93 × 10-¹⁸ J

∆E = hf = hc / λ

λ = (h × c) / ∆E

= ( 6.625 × 10-³⁴ × 3 × 10⁸) / 1.93 × 10-¹⁸

= 19.878 × 10-²⁶ / 1.93 × 10-¹⁸

= 10.299× 10-⁸

= 102.99×10-⁹

= 102 nm

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As we move across period 3 the number of delocalized electrons per metal atom increases and the radius of the elements decreases. This means the melting point increases.

What is melting point and boiling point ?

The temperature at which molecules in a solid can pass one another and transform into liquids is known as the melting point. On the other hand, liquids and gases are involved in the boiling point. Some molecules at the liquid's surface are escaping as the molecules move around.

The three metals' melting and boiling points rise as a result of the strengthening of their metallic connections. Each atom can contribute an increasing quantity of electrons to the delocalized "sea of electrons." As you get from sodium to magnesium to aluminum, the atoms also get smaller and have more protons.

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A solid with a covalent network is silicon dioxide. Carbon dioxide is a covalent molecule, whereas magnesium oxide is an ionic substance.

It is a covalent molecule, carbon dioxide. Although the complex has polar C-O bonds, it is often nonpolar, therefore the molecules are only held together by modest dispersion forces.

Ionic solids include the substance magnesium oxide. It has a crystal lattice made up of magnesium ions and oxygen ions. The chemical is almost insoluble in water because of the significant lattice energy and small ion sizes.

Chains of silicon-oxygen bonds make up the covalent network solid known as silicon dioxide. The network solid has a high melting point and creates a very stiff structure.

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When writing the chemical equation for a reaction, a reactant in aqueous solution is indicated with (aq); formation of a solid is indicated with (s).

Chemical equations serve to represent the transformation of reactants into products. For instance, the combination of iron (Fe) and sulphur (S) results in iron sulphide (FeS). The plus symbol indicates that sulphur and iron react to form FeS.

The four primary categories of chemical reactions are single displacement, double displacement, breakdown, and synthesis. But keep in mind that other people refer to these reactions by other names.

They are equations that represent chemical reactions using chemical formulae and symbols. In a chemical equation, the reactants are represented on the left and the products are on the right. A symbol that denotes the reaction's direction separates these two entities.

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Step 1: Begin with a balanced chemical equation and starting amounts for each reactant.

Step 2: Convert mass of each starting reactants to moles.

Step 3: Calculate the number of moles used for each reactant. is the limiting reagent.

what is limiting reaction?

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The solution for addressing transportation concerns and reducing the amount of carbon dioxide released into the atmosphere might include promoting vehicles powered by renewable energy sources to harvest the crops and get them to market (Option B).

The expression renewable energy sources make reference to different types of energy that replace the use of fossil based fuels in order to avoid the increase in the carbon dioxide level.

Therefore, with this data, we can see that renewable energy sources such as wind energy or solar energy replace fossil based fuels.

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Due to same d-same shell, that's why first ionization energy of the transition elements .

Ionization energy, also called ionization potential, in chemistry and physics, the amount of energy required to remove an electron from an isolated atom or molecule.

Transition elements (also known as transition metals) are elements that have partially filled d orbitals. IUPAC defines transition elements as an element having a d subshell that is partially filled with electrons, or an element that has the ability to form stable cations with an incompletely filled d orbital.

In transition elements, the first ionization energy of the elements remain constant because of poor shielding in d-subshell. The electrons suffers repulsion due to which their ionic radii does not decrease on moving from left to right. That's why first ionization energy of the transition elements from Sc to Zn fairly constant until Zn.

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The standard entropy change for the combustion of 1 mole of diamond at room temperature is 6.22  J / K mol.

The reaction is given as :

C (diamond)  + O₂   ----->  CO₂

At room temperature the value of S°  is given as follows :

C = 2.38 J / K mol

O₂ = 205.2 J/Kmol

CO₂ = 213.8 J/Kmol

The  standard entropy change is given as :

ΔS° = ∑S° product  - ∑ S° reactant

ΔS° = ( 213.8 ) - ( 2.38 + 205.2)

ΔS° = 213.8 - 207.58

ΔS° = 6.22  J / K mol

Thus, The standard entropy change for the combustion of 1 mole of diamond at room temperature is 6.22  J / K mol.

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The reactivities of tert-butyl bromide and 2-bromopropane are related to the stabilities of the carbocations produced as intermediates in the reaction in several ways.

First, it is important to note that tert-butyl bromide has an electron-withdrawing group (carbonyl) attached to its aromatic ring. This makes it more reactive than 2-bromopropane because it is easier for tert-butyl bromide to achieve a favorable resonance structure.

Second, it is also important to note that tert-butyl bromide has a more stable carbocation intermediate than 2-bromopropane because it has a larger number of bonds between carbon atoms. This means that these bonds take longer to break apart during the transition state, which makes it harder for tert-butyl bromide's intermediate to form.

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Answer:

The answer is sophisticated earthquake early-warning systems, increasingly accurate storm forecasting, and innovative flood risk and flood mitigation projects provide communities with the tools they need to respond to impending hazard events, and infrastructure design and engineering improvements help to reduce the damage suffered

Explanation:

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