A mysterious element is found in its neutral state. It has an atomic number of 88. Which element is it?

radon
uranium
radium
francium

Answer:

It would be c

Explanation:

The element is Neon
The protons is the same as the atomic number (10 protons)
The electrons are the same as the number of protons in a neutral atom (10 electrons)
The neutrons can be found by subtracting the protons from the atomic mass (22-10=12 neutrons)

Answer:

10^25
Simplify:

10x10^12 = 10^13
1x10^12 = 10^12
Steps:
10^12 * 10^13 = 10^25

In this balanced equation Reactants and products are equal in the chemical reaction.

When heated limestone decomposes into calcium oxide and carbon dioxide. It is a decomposition reaction in which calcium carbonate decomposes and carbon dioxide gas is generated. Calcium oxide is the second product of the reaction. A chemical reaction that produces two or more products from one reactant is called a decomposition reaction.

The answer is the decomposition reaction. The starting material for the reaction is calcium carbonate. Calcium carbonate decomposes to produce calcium oxide and carbon dioxide gas. The balance of carbon atoms and the balance of the number of oxygen atoms in oxygen atoms. This reaction is therefore balanced. That's right, 1 molecule of calcium carbonate 1 molecule of hair 1 molecule of calcium oxide, and 1 molecule of carbon dioxide. So the coefficient for carbon dioxide is 1.

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Answer:

Explanation:

Conceptually, ionization energy is the opposite of electronegativity. The lower this energy is, the more readily the atom becomes a cation

Yes, I believe that people should keep trying. As many attempt we made as nearest possible outcome we get.

As we know that, practice make a man perfect. If we stop doing practices in the believe that this work is impossible then we never make it possible. But if we keep trying we always get outputs. Most scientists believe that perpetual-motion devices can never be invented, but people come up with new ideas for them all the time. Be always be confidence.

In this example we see that if people not think about making such type of device it never been happen. There is no shortcut way to obtain great goal. We never give up or lose our hope in just one attempt.

Thus I concluded that people should keep trying. As many attempt we made as nearest possible outcome we get. Do as many time until you not reach to your goal.

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The maximum wavelength of light that can do this is  2.76 x 10⁻¹⁶ m.

The maximum wavelength of light is the maximum distance the light can travel at the given energy, which is determined by applying the following equation.

E = hf

E = hc/λ

where;

λ = hc / E

λ = (6.626 x 10⁻³⁴ x 3 x 10⁸) / (7.21 x 10⁻¹⁰)

λ = 2.76 x 10⁻¹⁶ m

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Cytochalasin b is a chemical that disrupts microfilament formation. With which aspect of cell division would cleavage furrow.

Cytochalasin B, the call of which comes from the Greek cities (cellular) and achalasia (relaxation),[1] is a mobile-permeable mycotoxin. It changed into found that substoichiometric concentrations of cytochalasin B (CB) strongly inhibit community formation by using actin filaments. Because of this, it is frequently utilized in cytological research.

Cytochalasin B inhibits glucose shipping[3] and platelet aggregation. It blocks adenosine-brought-on apoptotic body formation without affecting the activation of endogenous ADP-ribosylation in leukemia HL-60 cells.[4] it is also utilized in cloning through nuclear transfer. right here enucleated recipient cells are handled with cytochalasin B. Cytochalasin B makes the cytoplasm of the oocytes extra fluid and makes it possible to aspirate the nuclear genome of the oocyte within a small vesicle of plasma membrane right into a micro-needle.

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Disclaimer:- your question is incomplete, please see below for the complete question.

Cytochalasin b is a chemical that disrupts microfilament formation. With which aspect of cell division would cytochalasin b interfere?.

A) formation of the cell plate

B) binary fission

C) cleavage furrow

D) formation of the mitotic spindle

E) DNA replication

According to mole concept, 25 g sample of methyl alcohol  has 0.780  moles.

Mole is defined as the unit of amount of substance . It is the quantity measure of amount of substance of how many elementary particles are present in a given substance.

It is defined as exactly 6.022×10²³ elementary entities. The elementary entity can be a molecule, atom ion depending on the type of substance. Amount of elementary entities in a mole is called as Avogadro's number.

It is widely used in chemistry as a suitable way for expressing amounts of reactants and products.For the practical purposes, mass of one mole of compound in grams is approximately equal to mass of one molecule of compound measured in Daltons .Molar mass has units of gram per mole . In case of molecules, where molar mass  in grams present in one mole  of atoms is its atomic mass.

For the given problem, number of moles is calculated as, mass/molar mass

By substituting the respective values, 25/32.04=0.780 moles.

Hence, 25 g of methyl alcohol has 0.780 moles.

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The model of the atom is the electron.

Experiments with JJ Thomson's cathode ray tube showed that all atoms contain small negatively charged subatomic particles or electrons. Thomson proposed a plum pudding model of an atom in which negatively charged electrons are embedded in a positively charged soup. In 1897, Thomson discovered the electron and proposed a structural model of the atom.

His research also led to the invention of the mass spectrometer. According to Thomson's atomic model, atoms consist of positively charged spheres injected with negatively charged electrons. Since electrons and protons are the same sizes the atom is electrically neutral. Thomson discovered the electron through experiments with Crookes or cathode ray tubes. He showed that cathode rays are negatively charged. In addition, he also studied positively charged particles in neon gas.

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Dalton and Thomson agreed on that carbon atom - Is electrically neutral .

In the first section of his thesis, he claims that all matter is composed of indivisible atoms. According to the second component of the theory, the mass and characteristics of every atom in a specific element are the same. Compounds, according to the third section, are combinations of two or more different kinds of atoms.

1) Atoms make up all matter. Atoms are unbreakable and undivideable.

2) The mass and characteristics of every atom in a specific element are the same.

3) Two or more different types of atoms combine to create compounds. 4) Atoms are rearranged during a chemical process.

The electron is the lightest known stable subatomic particle. It has a negative charge that is equivalent to 1.602176634 coulombs, which is regarded as the fundamental unit of electric charge. 9.1093837015 1031 kg, or just 1/1,836 the mass of a proton, is the rest mass of an electron.

By simply depositing a given number of electrons on one electrode of a capacitor and measuring the voltage, Vs, across the capacitor, it is possible to estimate the charge of the electron.

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Answer:

I believe there is 4!

Explanation:

Valence electrons are electrons located in the outer shell of an atom.

Answer:

4

Explanation:

Valence electrons are electrons located in the outer shell of the atom.

Increasing the surface area of a reactant increases the rate of collisions which also increases the reaction rate.

Because increasing the surface area of an incentive increases the frequency of collisions and increases the reaction rate. some smaller molecules have more surface area than one large particle. further, the surface area that is available for particles to collide, a speedy reaction will occur. The rate of a chemical reaction can be elevated by increasing the surface area of a solid reactant. Molecular movement is affected by heat and temperature. because the temperature is the computation of the average kinetic energy of the molecules and acts for the motion of molecules. grow surface area is the most favored trend for better performance of gas sensor materials.

So we can conclude that So the larger the surface area of the solid, the faster the reaction will be.

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answer and explanation

the first step is to balance the reaction equation

N₂ + 2O₂ > 2NO₂

now that we have balanced the equation we can calculate the number of moles of nitrogen

mols = mass / molar mass

= 62.7 g/ 14.00g/mol

= 4.48 mols

we see from the balanced equation that the mol ratio of nitrogen and nitrogen oxide is 1:2

therefor the number of mols of nitrogen oxide that will form will be

2 x 4.48 = 8.96 mol of nitrogen oxide.

now that we have the mols we can then calculate the volume using the ideal gas equation

PV =nRT

V = (nRT)/P

= (8.96 x 0.0821 x 620) / 0.72

= 633.5L

When Benzoic Acid reacts with aqueous NaOH, a species of ester and Benzene named, Benzoate Ion is formed.

When Benzoic acid is reacted with aqueous NaOH, water and Sodium benzoate is formed.

Sodium benzoate is present with water, So, the sodium benzoate dissolves in water and forms benzoate ion.

Benzoate are species of ester.

Benzoate ion is soluble in water while benzoic acid is not soluble in water.

Benzoic acid forms a layer over water.

Benzoate is of great use in industrial purposes, it is used in food preservative and beauty products.

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The s and p are the two sub shells which are added to find the number of valence electrons.

A valence electrons is defined as the negatively charged particles of an atom that must lose or gain to reach the inert gas electronic configuration. Valence electrons are located at the outermost shell of an atom.

Example: Oxygen which has an atomic number 8. And the electronic configuration of oxygen is 2,6 that means oxygen has 6 Valence Electrons in its outermost subshell. Out of 6, 2 Valence Electrons are in 2s subshell and 4 Valence Electrons are in 2p subshell.

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With the aid of a transport molecule, chemicals can be transported across a biological membrane from a region of higher concentration to an area of lower concentration.

The process of spontaneous passive transport of molecules or ions across a biological membrane by certain transmembrane integral proteins is known as facilitated diffusion. It is sometimes referred to as facilitated transport or passive-mediated transport.

The passage of certain chemicals through protein channels to traverse cell membranes. It is a sort of passive transport, thus it is not quite diffusion. proteins for transport. proteins that assist in moving materials across cell membranes and throughout the body.

Facilitated diffusion is demonstrated by the movement of amino acids and glucose into cells from the circulation. These molecules are ingested by active transport in the small intestine and subsequently released into the circulation.

Thus, the chemicals can be transported across a biological membrane from a region of higher concentration to an area of lower concentration.

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the relative mass of propylene (c₃h₆) is 42.1 g/mol. the  carbon atoms does a polypropylene molecule with a molar mass of 42.1 kg/mol contain 3000 atoms

42.1 kg / 1 molecule * 1000 / 1 kg = 4100 g / molecule

formula of propylene = C3H6

number of moles of propylene = 42100 / 42.1

                                                    = 1000 mole

number of propylene molecules =  1000 * 6.023 * 10^23

                                                        = 6.023*10^26

so, total carbon atom in the given propylene = 3 * 6.023* 10^26

                                                                           = 1.087*10^27

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Option a) is correct - if the volume of this reaction at chemical equilibrium is increased, the reaction will shift to the left in the direction of the reactants.

When considering the effect a change in volume or pressure will have on the system that is in chemical equilibrium, it is very important to take into account the aggregate state of all the reaction components. The rule is that the increase in volume will result in the reaction shifting in the direction with more gaseous particles.

So, we analyze our reaction - on the left side we have 5 gaseous particles in total (3 hydrogen sulfide molecules and two oxygen molecules). On the right side, we have either two (if the water is liquid) or four (if the water is also in the vapor phase).

Since we have more molecules in the gaseous phase on the left side of the reaction, if we increase the volume, the reaction will shift to the left, in the direction of the reactants (option a).

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Answer:It explodes

Explanation:Based on the 4Fe 302 and 203 The Fe explodes if mixed together

The molar concentration of a sugar solution is 0.3m. This beaker is sitting on your desk in the open air. The solute potential at 27 c will be 7.48.

The solute potential at 27 c- will be 7.48.

Concentration of the sugar solution, C = 0.3 M

Temperature, T = 27° C = 273 + 27 = 300 K

The solute potential is given as:

solute potential = - iCRT

i is the number of particles the particular molecule will make in water

i = 1 for sugar

R is the universal gas constant = 0.0831 liter bar/mole-K

on substituting the respective values, we get

solute potential = - 1 × 0.3 × 0.0831 × 300

or

The solute potential = - 7.479 ≈ - 7.48

The solute potential is equal to the water potential when no physical pressure is applied to a solution. A solution's water potential, or the ability for the water to flow and perform work, will change if physical pressure is applied to it.

Solute potential is the degree to which the water potential decreases as a result of the dissolution of a solute. When a solute is dissolved in water, fewer free water molecules are present, which lowers the molecules' kinetic energy. As a result, the solute potential decreases.

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Gas Vol1 = 0.341L

Temp1 = ?

Gas Vol2 = 0.156L

Temp2 = 32°c + 273 = 305K

If amount of gas and pressure remain constant,

Ideal Gas Equation - PV = nRT

PV = nRT represents the ideal gas equation. P is for ideal gas pressure, V for ideal gas volume, n stands for the total amount of ideal gas measured in moles, R stands for the universal gas constant, and T stands for temperature.

Ideal gas, sometimes known as perfect gas, is a gas that physically complies with the ideal, or general, gas law, a particular idealized relationship between pressure, volume, and temperature.

V ∝ T (n, R, P constant)

So, V1 / T1 = V2 / T2 [V/T = constant]

Temp1 = (T2*V1) / V2

   = (305 * 0.341) / 0.156

   = 666.70 K - 273

  = 393.67 °c

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Molar mass of each compounds are given below:

A substance's molar mass is the weight in grams of one mole of the compound.

(1) Sodium Hydroxide (NaOH)

In NaOH one sodium atom (Na) , one oxygen atom (O) and one hydrogen atom (H) are present.

Molar mass of Na = 22.989g/mol

Molar mass of O = 15.999 g/mol

Molar mass of H = 1.008 g/mol

So, molar mass of Sodium hydroxide (NaOH) = (22.989+15.999+1.008) g/mol = 39.996 g/mol.

(2) Glucose ([tex]C_{6}H_{12}O_{6}[/tex])

In Glucose six carbon atoms (C) , six oxygen atoms (O) and twelve hydrogen atoms (H) are present.

Molar mass of C = 12.001 g/mol

Molar mass of O = 15.999 g/mol

Molar mass of H = 1.008 g/mol

So, molar mass of Glucose = (12.001*6)+(15.999*6)+(12*1.008) g/mol = 180.156 g/mol

(3) Calcium sulphate ([tex]CaSO_{4}[/tex])

In Calcium sulphate one calcium atom (Ca) , four oxygen atoms (O) and one sulphur atom (S) are present.

Molar mass of Ca = 40.078 g/mol

Molar mass of O = 15.999 g/mol

Molar mass of S = 32.065 g/mol

So, molar mass of Calcium sulphate = (40.078)+(15.999*4)+(32.065) g/mol = 136.14 g/mol

(4) Magnesium phosphate [[tex]Mg_{3}(PO_{4})_{2}[/tex]]

In Magnesium phosphate three magnesium atom (Mg) , eight oxygen atoms (O) and two phosphorus atom (P) are present.

Molar mass of Mg = 24.305 g/mol

Molar mass of O = 15.999 g/mol

Molar mass of P = 30.974 g/mol

So, molar mass of Magnesium phosphate = (3*24.305)+(15.999*8)+(30.974*2) g/mol = 262.86 g/mol

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Answer:

see below

Explanation:

Answer:

The law is the mathematical explanation of a natural phenomenon while a theory can be the best possible explanation of a natural phenomenon.

Explanation:

The law is:

The mathematical explanation of a natural phenomenon.

Law is accepted by all scientists.

Law is a certain truth and never replaced.

Example: Law of motion, Law of independent assortment.  

The theory is:

The best possible explanation of a natural phenomenon.

There can be many theories for the same phenomenon.

Theory can be replaced with a better one.

Example: Theory of relativity, Germ theory of disease.

On the basis of the above explanation, we can conclude that the law is the mathematical explanation of a natural phenomenon while a theory can be the best possible explanation of a natural phenomenon

Answer:

hope this helps!::

Explanation:

Microbiology is the study of microorganisms including, bacteria, viruses, algae, fungi and protozoa. Microorganisms are most famous for their ability to cause disease, however, microorganisms are also vital to agriculture, industry and ecology. In fact, life on Earth would not survive without microorganisms. Studying microorganisms will help scientists see how the human cells react to diseases, poison, etc.

The energy are there in one photon of orange light whose wavelength is 630nm is  [tex]3.15401\times10^{-19}[/tex] Joules.

W=c/v, c=speed of light, v=frequency

[tex]6.3 \times 10^-7=3 \times 10^8/v[/tex]

[tex]v=3 \times 10^8 / 6.3 \times 10^-7[/tex]

[tex]v=4.76 X 10^14 Hz[/tex]-frequency of the yellow light.

E=hv, h=Planck's constant,

[tex]E=(4.76 \times 10^14)Hz \times 6.62607×10^-34 J s[/tex]

[tex]E=3.15401\times10^{-19}[/tex] Joules- the energy of a single photon of yellow light.

Planck's constant or Planck's constant, is a fundamental physical constant of quantum mechanics. The constant gives the ratio of the energy of the photon to its frequency, and for mass-energy equivalent, the ratio of mass to frequency.

In quantum mechanics, energy is exchanged and absorbed in certain amounts called quanta. The Planck constant is a number that defines the amount of energy in these quantities and expresses how small things can be. Learn more about Planck's constant in this infographic.

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