The box shows the element helium as it appears in the periodic table. He Helium 4.0 Which list gives the correct numbers of subatomic particles for a neutral atom of helium?

A. Two protons, four neutrons, six electrons
B. Two protons, two neutrons, two electrons
C. Two protons, two neutrons, four electrons
D. Four protons, four neutrons, four electrons​

Microstructure of only alpha will represent an alloy that is below the solubility limit for component b in the alpha phase.

The alpha and beta phases are phases that represent a solid solution of elements A and B. The alpha phase will have a crystal structure like pure A and will contain some B substituting in the crystal lattice. Likewise,  beta phases will have an element B crystal structure with A substituting for some B atoms.

To know more about crystal lattice click here:

https://brainly.com/question/1669724

#SPJ4

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.

Learn more about network solids:

brainly.com/question/8236583

KOH(aq) + H3PO4(ag) → K3PO4(ag) + H₂O

the coefficient of the phosphoric acid from the above equation was 1

Explain about phosphoric acid ?

Phosphoric acid (orthophosphoric acid, monophosphoric acid, or phosphoric(V) acid) is a colourless, odorless phosphorus-containing solid and inorganic substance having the chemical formula H3PO4. It is most usually seen as an 85% aqueous solution, which is a colourless, odourless, non-volatile syrupy liquid. It is an important industrial chemical that is found in many fertilisers.

The compound is an acid. The phosphate ion PO 34 is formed when all three H+ ions are removed. The removal of one or two protons yields the dihydrogen phosphate ion H2PO - 4 and the hydrogen phosphate ion HPO 2 4, respectively. Phosphoric acid creates esters known as organophosphates.

The term "orthophosphoric acid" can be used to distinguish this acid from other "phosphoric acids," such as pyrophosphoric acid. Nonetheless, the word "phosphoric acid" refers to this particular molecule.

the balanced equation was

3 KOH(aq) + H₂PO4(ag) → K3PO4(ag) + 3 H₂O(1)

so the coeffecient of the phosphoric acid was 1

To learn more about phosphoric acid follow the given link: https://brainly.com/question/2784465

#SPJ1

On adding more CO2 equilibrium shifts to left, adding more oxygen the equilibrium shift to right,  increasing a temperature will shift the equilibrium to left and adding the catalyst will not affect the equilibrium.

According to Heisenberg Uncertainty Principle, if the equilibrium of a system of reaction is disturbed by making any changes in the property the reaction will shift into that direction by itself that stabilizes the equilibrium again.

According to the reaction,

CH4O + O2 = H2O + CO2 + Heat

a. Adding more CO₂ will shift the reaction towards the left side or we can say that adding carbon dioxide into the system will shift the reaction towards the reactant side. Because the concentration of carbon dioxide on the product side has increased, the equilibrium is disturbed so in order to stabilize the equilibrium again the reaction will shift towards the reactant side.

b. Adding more oxygen means that we are adding more amount of reactants which disturbs the equilibrium of the reaction so to stabilize the equilibrium again the reaction will shift towards the product side.

c. Increasing the temperature of the equation means that we are giving heat to the system which means that the equation or the system will shift toward the product side because the reaction is exothermic in nature.

d. Adding a catalyst will not affect the equilibrium of the reaction it will only increase the rate of the reaction.

To know more about equilibrium, visit,

https://brainly.com/question/517289

#SPJ4

catalytic process, A Ni catalyst is required for amide and alcohol to make the right esters. hydroxide ion is a stronger nucleophile than either water or ethanol,

In general, catalytic activity is a chemical interaction between a catalyst and a reactant that yields chemical intermediates more readily able to react with one another or with another reactant to yield the desired end product. Catalysis is the process of accelerating a chemical reaction by adding a catalyst to it. Catalysts are unaffected by and are not destroyed by the reaction.

learn more about catalyst here:

https://brainly.com/question/28813725

#SPJ4

They were electrons in an atom's greatest primary energy level, which is occupied. In chemical bonds, they take part.

Atoms in molecules are held together by chemical bonds. Electrostatic forces between negatively charged electrons and positively charged atomic nuclei, whose locations in space are governed by quantum mechanics, give rise to bonds.

One of the most fundamental principles of chemistry, chemical bonding helps to explain other ideas like molecules and reactions. Without it, scientists would be unable to explain why atoms are drawn to one another or how products are created during a chemical process.

To know  more about chemical bond visit:

https://brainly.com/question/15444131

#SPJ13

Ground state electron configuration of bohrium is 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 6p⁶ 5f¹⁴ 6d⁵ 7s². Atomic number of Bohrium is 107.

Elements are composed of identical atom, they cannot be distinguished from one another and are inseparable. In the entire periodic table , 118 elements have been know till the present.

Every electron in an atom has its position in the orbital system described by a set of four quantum numbers. The electron configuration uses this set of quantum numbers, to describe the distribution of an electrons present in a certain atom. For a neutral (uncharged) atom in the ground (non-excited) state, its configuration can be readily predicted from the row (period) and column (group) position of its element in the periodic table.

Bohrium is a element of group 7, period 7 and part of 'd' block.

learn more about electron configuration: https://brainly.com/question/26084288

#SPJ4

The reason that some scientists did not agree with Newlands 'Law of Octaves' was Because so many new elements were still being found and could not be included in the table, many scientists did not agree with Newland's law of octaves.

He placed sulfur (S) and oxygen (O), two non-metals, in the same group as iron (Fe), a metal, as an illustration. His table was rejected by other scientists as a result.

Additionally, not all of the elements in his octaves shared the same characteristics. For instance, in the seventh octave, O (Oxygen, a non-metal), and Fe (Iron a metal).

Learn more about 'Law of Octaves from

https://brainly.com/question/21672702
#SPJ1

Answer:

D

Explanation:

The heat of combustion for the unknown hydrocarbon when1 mole of an unknown hydrocarbon is burned in a bomb calorimeter and the Calorimeter increases in temperature by 12.19°C is -611.26kJ/mol

A device that is mostly used to measure combustion temperatures. The reaction occurs in a sealed area known as the calorimeter proper, in constant thermal contact with its surroundings (the jacket).

To calculate the heat of combustion we follow the given steps:

Heat released by the combustion =Cp×ΔT=1.929×12.19 kJ=23.51 kJ

Hence, ΔH=−23.51 kJ/g

A unknown hydrocarbon has an empirical formula of CH and a molar mass of 26 g/mol.

So,  ΔH combustion=−23.51×26g /mol=−611.26kJ/mol

Hence, ΔH combustion=−15.6×180 kJ/mol=−611.26kJ/mol

ΔH combustion=−611.26kJ/mol

Hence, the heat of combustion for the unknown hydrocarbon when1 mole of an unknown hydrocarbon is burned in a bomb calorimeter and the Calorimeter increases in temperature by 12.19°C is -611.26kJ/mol

To know more about Bomb Calorimeter visit

https://brainly.com/question/24245395

#SPJ1

Answer:

About 94

Explanation:

(1× 5.67×10²⁵)/6.03×10²³

94.03 moles of Carbon

About 94

The molarity of a solution containing 104.2 grams of BaCl2 in enough water to make 800 ml of solution is 0.625mol/L.

What is molarity?

Molarity is one of the measures of the concentration in terms of the number of moles of the solute dissolved in particular volume of the solution.

Molarity of BaCl2 can be calculated by,

Molecular mass of BaCl2 is 208.23gmol^-1

Number of moles = mass / molecular mass = 104.2g / 208.23gmol^-1 = 0.50mol.

Molarity = Number of moles / volume = 0.50mol / 0.8L = 0.625mol/L.

Therefore, molarity of a solution containing 104.2 grams of BaCl2 in enough water to make 800 ml of solution is 0.625mol/L.

To learn more about molarity click on the given link https://brainly.com/question/17138838  

#SPJ4

Whether they are polar or nonpolar, all molecules exhibit dispersion forces. Atoms and molecules that are bigger and heavier show larger dispersion forces than those that are smaller and lighter.

Look for the molecule with the most polarity, the most electronegative atoms, or the most hydrogen bonding groups if the molecules have identical molar weights and similar intermolecular forces. That one will have the overall stronger IMFs.

Each pair of molecules is as identical as possible except for the fact that one is polar and the other is nonpolar. The polar substance always has the higher boiling point, which denotes stronger attraction forces, or stronger intermolecular forces, between individual molecules.

Learn more about intermolecular forces at

https://brainly.com/question/14276382

#SPJ4

1.00 mole of calcium hydroxide has 1.20 × [tex]10^{24}[/tex] atoms.

Calcium hydroxide is an odorless white powder. It's utilized in industrial settings, inclusive of sewage treatment, paper production, creation, and food processing. It also has medical and dental makes use of. as an instance, root canal fillings frequently include calcium hydroxide.

Prolonged contact of the pores and skin with calcium hydroxide may motive skin and a vesicular rash, skin ulceration, and corrosion in a few cases. Ingestion of this material has induced intense pain, vomiting, tissue corrosion, perforation, and loss of life.

Calcium hydroxide, also called slaked lime, is obtained by using the motion of water on calcium oxide. While combined with water, a small share of it dissolves, forming an answer referred to as limewater, the relaxation ultimate as a suspension referred to as milk of lime.

Learn more about calcium hydroxide here:- https://brainly.com/question/9807304

#SPJ4

There are two types of chemical compound one is covalent compound and other is ionic compound, covalent compound formed by sharing of electron and ionic compound formed by complete transfer of electron. Therefore, ionic compounds with transition metals and  ionic compounds without transition metals are named in the same way.

Chemical Compound is a combination of molecule, Molecule forms by combination of element and element forms by combination of atoms in fixed proportion.

Ionic compounds with transition metals are named with the same method as compounds without transition metals, except the charge of the metal ion is specified by a Roman numeral in parentheses after the name of the metal.

Therefore, ionic compounds with transition metals and ionic compounds without transition metals are named in the same way.

To learn more about chemical compound, here:

https://brainly.com/question/26487468

#SPJ1

If Ozone does not absorb UV radiation the temperature would rise enormously and the life on planet will be at risk.

This is because the Ozone layer covers the Earth and has the foremost function of absorbing and trapping the incoming UV and IR radiations, which if not absorbed can heat up the planet thereby increasing its overall temperature.

The non-entrapment of UV,IR rays will be futile to the biological contents of Earth and even cause fatalities to  the abiotic components of the planet .Observations have shown that the increase in emission of greenhouse gases like Carbon dioxide, methane and synthetic chemicals like CFCs  disrupted the Ozone layer eventually affecting the climate.

Ozone damage impact the climate primarily by fluctuating the temperature. The more ozone in a given quantity of air, the more heat it traps. Ozone generates heat in the stratosphere, both by absorbing the sun's UV radiation and by absorbing IR radiation from the lower layer of atmosphere.

To learn more about the Ozone layer visit :

https://brainly.com/question/27911475

#SPJ4

When the kinetic energy of an object changes, the motion of that object also changes at the same time.

The amount of energy that a body posses by virtue of its motion is known as Kinetic energy. Therefore, kinetic energy can only be found in objects which are in motion. The amount of Kinetic energy is calculated as follows:

K = 1 /2 mv²

Where, K represents the kinetic energy, m is the mass of the moving object, and v is the velocity or the speed of the object at which it is moving.

If the kinetic energy of the body increases then the motion of the body also increases and if the kinetic energy decreases then the velocity also decreases.

Learn more about kinetic energy from the link given below.

https://brainly.com/question/16667164

#SPJ1

One of the four general catalytic methods used by serine proteases is catalysis by approximation.

Endo proteases come in several forms, including serine proteases. They are, nonetheless, quite common in both prokaryotes and eukaryotes. Protease A, a chymotrypsin-like protease from Stremptomyces griseus, has a primary sequence very different from chymotrypsin, but its overall tertiary structure is very similar to chymotrypsin.

The positions of the catalytic triad amino acids in the primary sequences of the protein are very similar, indicating that the genes for the proteins diverged from a common precursor gene. B. subtilisin, a serine protease, in contrast, Subtilis shares only a small amount of tertiary structural homology with chymotrypsin. But when folded, it also possesses a catalytic triad (Ser 221 - His 64 - Asp 32) akin to chymotrypsin's (Ser 195 - His 57 - Asp 102).

To know more about serine proteases, visit:

https://brainly.com/question/19053549

#SPJ4

Average rate of formation of products  = 1/n (Change in concentration /Time rate) = -Average rate of consumption of reactants.

What is Chemical reaction ?

There are chemical reactions taking place all around us. Nothing could be further from the reality, despite the fact that we occasionally link chemical processes with the sterile surroundings of the test tube and the lab. A staggering, nearly incomprehensible variety of new substances and energy changes actually result from the enormous number of alterations that occur in our environment every second of every day.

Chemical reactions happen whether or not you want them to in nature, where they can be considerably less controlled than in a lab. They can also be more messier. Whether it be a forest fire that is blazing.

To know more about the chemical reaction ,click the link given ;

brainly.com/question/11231920

#SPJ4

The value calculated by using excess if NaOH by overshooting endpoint  during titration will be not correct.

The value of concentration is supposed to change when excess of NaOH is used. it will be little too high than the correct value. Thus, titration require precise values. Overshooting the endpoint will result in a calculation error for the solution that is being titrated. The calculation for the titrated solution will be off if the moles of titrant are incorrect because the volume of titrant is incorrect because it is higher than it should be.

To know more about titrations, click here,

brainly.com/question/186765

#SPJ4

The other ions are S[tex]O^{2-}_{4} }[/tex] and C[tex]O^{2-} _{3}[/tex].

Precipitation reaction:

A chemical reaction occurs in an aqueous solution where two ionic bonds combine, resulting in the formation of an insoluble salt. These insoluble salts formed in precipitation reactions are called precipitates.

The solubility rules to determine the solubility of the compound are as follows:

1. The common compounds of group 1A are soluble.

2. All the common compounds of ammonium ion and all acetates, chlorides, nitrates, bromides, iodides, and perchlorates are soluble in nature. Only the chlorides, bromides, and iodides of [tex]Ag^{+}[/tex] ,[tex]Pb^{2+}[/tex] ,[tex]Cu^{+}[/tex]  and [tex]Hg^{2+} _{2}[/tex]  are not soluble.

3. All common fluorides, except for group 2A fluorides, are soluble. Moreover, sulfates except CaSO4 ,SrSO4 ,BaSO4 ,Ag2SO4  and PbSO4 are soluble.

4. All common metal hydroxides except CaSO4,Sr(OH)2 ,Ba(OH)2  and hydroxides of group 1A and that of transition metals are insoluble in nature.

5. All carbonates and phosphates, except those formed by group 1A and ammonium ion, are insoluble.

6. All sulfides, except those formed by groups 1A, 2A, and ammonium ion are insoluble.

7. Salts that contain [tex]Cl^{-}[/tex] ,[tex]Br^{-}[/tex]  or[tex]I^{-}[/tex]  are usually soluble except for the halide salts of [tex]Ag^{+}[/tex],[tex]Pb^{2+}[/tex]  and ([tex]Hg^{2+} _{2}[/tex]).

8. The chlorides, bromides, and iodides of all the metals are soluble in water, except for silver, lead, and mercury (II). Mercury (II) iodide is water-insoluble. Lead halides are soluble in hot water.

9. The perchlorates of group 1A and group 2A are soluble in nature.

10. All sulfates of metals are soluble, except for lead, mercury (I), barium, and calcium sulfates.

The reaction of Ca2+ and [tex]SO^{2-} _{4}[/tex] is as follows:

[tex]Ca^{+}[/tex](aq)  +  [tex]CO^{2-} _{3}[/tex](aq) --------> CaCO3(s)

Therefore there are [tex]SO^{2-} _{4}[/tex] and [tex]CO^{2-} _{3}[/tex] that can form a precipitation.

To know more about precipitation refer to the link given below:

https://brainly.com/question/14330965

#SPJ4

Answer:

The liquid radiation targets cancerous cells while causing minimal damage to surrounding healthy cells.

The molar mass of a substance can be calculated from its density alone if that substance is a gas at STP.

The molar mass of a substance is the mass of one mole of that substance.

One mole of a substance is the amount of that substance that contains as many elementary entities as there are in 12 g of carbon-12.

The number of particles in 12 g of carbon-12 is the Avogadro number = 6.03 * 10²³ particles.

One mole of all gases occupies the same volume at STP.

Also, the molar mass of a gas is related to the vapor density of that gas by the formula below;

Hence, the molar mass of a gas can be determined from the density of the gas by multiplying the vapor density of the gas. by 2.

Learn more about the molar mass of a gas at: https://brainly.com/question/506048

#SPJ1

The empirical formula of a compound containing c, h, and o is C₂H₆O₁.

In chemistry, the empirical formula represents the simple whole-number ratio of the atoms which are present in the compound. The initial step is to calculate and determine the masses. The next step which follows is to calculate the number of moles by dividing the grams by the atomic mass. Next, the number of moles is divided by each element by the smallest number of moles. Finally, we convert numbers to whole numbers since we don't represent empirical formulas in decimals.

To learn more about hydrocarbons and chemical compounds,

https://brainly.com/question/28482314

#SPJ4

The serine proteases use combination of the given strategies catalysis by approximation, non-covalent, covalent and metal ion

Serine proteases catalyze non-covalent bond is a sort of chemical link, generally between macromolecules, that doesn't entail the exchanging of electron pairs but instead involves more diffused types of electromagnetic interactions. In supermolecular chemistry, non-covalent bonds between supermolecules predominate over other types of bonds. The exchange of one or more pairs of electrons between two atoms forms a covalent connection. The two atomic nuclei are drawing these electrons in unison. When there is insufficient space between two atoms' electronegativities for an electron transfer to take place and create ions, a covalent bond is formed.

Learn more about covalent here:

https://brainly.com/question/19382448

#SPJ4

Yes, the reaction between aqueous solutions of potassium nitrate and copper(ii) sulfate happens when they are combined giving products by a reaction called double displacement reaction.

What is double displacement reaction?

Double displacement reaction is also called as double displacement exchange. This happens when some parts of 2 ionic compounds which are reacting are exchanged between them, making 2 new compounds. The positive and negative ions swap their places between the reactants in this reaction.

The reaction between aqueous solutions of potassium nitrate and copper(ii) sulfate give 2 products that is copper nitrate and potassium sulfate. This reaction is known as double displacement reaction.

Balanced chemical equation:

2KNO3 + CuSO4 ----> Cu(NO3)2 + K2SO4

Therefore, the reaction between aqueous solutions of potassium nitrate and copper(ii) sulfate is possible and it gives products like copper nitrate and potassium sulfate making it a double displacement reaction.

To learn more about double displacement reaction click on the given link https://brainly.com/question/23918356

#SPJ4

A nuclide is formed in the process [tex]^{206}Pb[/tex].

Polonium is а rаdioаctive element thаt occurs nаturаlly in very low concentrаtions in the eаrth’s crust. Mаrie аnd Pierre Curie discovered polonium in 1898 while they were seeking the cаuse of the rаdioаctivity of pitchblende ore thаt contаined urаnium. Polonium in its pure form is а low-melting, fаirly volаtile metаl. Аll polonium isotopes аre rаdioаctive, but most аre very short-lived аnd decаy rаpidly. Only three polonium isotopes lаst for аny аppreciаble аmount of time. Those isotopes аre polonium-208, polonium-209, аnd polonium-210.

Polonium-210 is the predominаnt nаturаlly occurring isotope of polonium аnd the one most widely used. Polonium-210 hаs а hаlf-life of 138 dаys, аnd it decаys to stаble leаd-206 by emitting аn аlphа pаrticle (аn аlphа pаrticle hаs two protons аnd two neutrons).

For more information about polonium refer to the link:

https://brainly.com/question/555482

#SPJ4

Answer:

One mitigating strategy for planning and zoning is to protect people and the environment from the nuisance impacts of facilities like landfills, sewage treatment plants and factories through land use planning tools. I learned that people need to Reduce greenhouse gas emissions through their food choices to mitigate the effects of using Renewable energy.

HI !!

Answer:

The empirical formula is CH2O

Explanation:

AWARD AS BRAINLIEST