what's element on the periodic table has the symbol w ​

Answer:

Science tells us that light is the reason we are able to see objects. Without light, we wouldn't be able to process the visible world. ... The electromagnetic spectrum is the range of all types of electromagnetic radiation, including visible light, infrared light, ultraviolet light, X-rays, and gamma rays.

Explanation:

i hope this is right :)

Answer:

(C) Vacuum

Explanation:

Balanced equation : 2Na+I₂⇒2NaI

Equalization of chemical reactions can be done using variables. Steps in equalizing the reaction equation:

• 1. gives a coefficient on substances involved in the equation of reaction such as a, b, or c, etc.

• 2. make an equation based on the similarity of the number of atoms where the number of atoms = coefficient × index (subscript) between reactant and product

• 3. Select the coefficient of the substance with the most complex chemical formula equal to 1

Reaction

Na+I₂⇒NaI

aNa+bI₂⇒NaI

Na, left=a, right=1⇒a=1

I, left=2b, right=1⇒2b=1⇒b=0.5

Equation becomes :

Na+0.5I₂⇒NaI x 2

2Na+I₂⇒2NaI

Answer:

0.008 moles of gas are present

Explanation:

Given data:

Volume of gas = 1.75 L

Number of moles =  ?

Temperature of gas = 58°C

Pressure of gas = 12.5 KPa

Solution:

The given problem will be solve by using general gas equation,

PV = nRT

P= Pressure

V = volume

n = number of moles

R = general gas constant = 0.0821 atm.L/ mol.K  

T = temperature in kelvin

Now we will convert the temperature.

58+273 = 331 K

Pressure = 12.5/101 = 0.12 atm

by putting values in formula:

0.12 atm× 1.75 L = n× 0.0821 atm.L/ mol.K   ×331 K

0.21 atm.L = n× 27.17atm.L/ mol

n = 0.21 atm.L /27.17atm.L/ mol

n = 0.008 mol

Answer:

C

Explanation:

edge2021!!

Answer:  The correct answer is c. change attitudes, beliefs or values.

Explanation:

Of these goals, the hardest to achieve is changing attitudes, beliefs, and values. It is difficult to convince an audience to truly change their attitudes, beliefs, or values based on your presentation since it typically requires establishing trust and respect on a personal level.

Answer:

¹⁰₄Be —> ¹⁰₃Li + ⁰₋₁β

Explanation:

To know which equation is unbalanced, we shall compare the mass number and atomic number of the reactant and product together. This is illustrated below:

¹²¹₅₀Sn —> ⁰₋₁β + ¹²¹₅₁Sb

121 = 0 + 121

121 = 121

50 = –1 + 51

50 = 51

Thus the above equation is balanced

¹⁹⁰₇₈Pt —> ¹⁸⁶₇₆Os + ⁴₂α

190 = 186 + 4

190 = 190

78 = 76 + 2

78 = 78

Thus, the above equation is balanced

¹⁰₄Be —> ¹⁰₃Li + ⁰₋₁β

10 = 10 + 0

10 = 10

4 = 3 + (–1)

4 = 3 – 1

4 = 2

Thus, the above equation is unbalanced.

²³⁸₉₂U —> ⁴₂α + ²³⁴₉₀Th

238 = 4 + 234

238 = 238

92 = 2 + 90

92 = 92

Thus, the above equation is balanced.

From the illustrations made above, only ¹⁰₄Be —> ¹⁰₃Li + ⁰₋₁β

Is unbalanced.

Answer:

the answer is pH of 7 I don't no Hydrochloric hijinx work

The equation pH = -log [H+], the pH of a solution with a hydrogen ion concentration is 5. Hence option c is correct.

Solution is defined as a continuous variation of two or more substances in their relative proportions up to what is known as the limit of solubility. Light beams do not disperse in the presence of a solution. In contrast, a suspension of particles might result in Tyndall or Rayleigh scattering. The amount of heat that is released or absorbed during the dissolving process is known as the enthalpy change of solution.

pH is defined as a measurement of how basic or acidic aqueous or other liquid solutions are. A solution's pH is a significant indicator of its chemical composition. The pH can affect how readily available nutrients are, how biological processes work, how bacteria behave, and how chemicals behave.

pH = -log[H+]

pH = -log[1.0 x 10⁻⁵]

pH = 5

Thus, the equation pH = -log [H+], the pH of a solution with a hydrogen ion concentration is 5. Hence option c is correct.

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Answer:

A water molecule consists of two hydrogen atoms and one oxygen atom. The three atoms make an angle; the H-O-H angle is approximately 104.5 degrees. The center of each hydrogen atom is approximately 0.0957 nm from the center of the oxygen atom.

Explanation:

The answer would be metals :)

Answer:

Meh i want to play

UwU

:)

Answer: yeah sure lad

Explanation:

Answer:

B

Explanation:

Gravitational pull is stronger when the person is closer to the planet.

The gravitational force is the fundamental force of the universe. Here the astronaut at position B will experience a stronger gravitational pull as compared to the astronaut at position A.

The gravitational force is defined as the force of attraction between any two bodies is directly proportional to the product of their masses and is inversely proportional to the square of the distance among them.

F = G m₁m₂ / r²

The gravitational force decreases with the increase in the distance. So here distance of astronaut at position B which is closer to the planet experience greater gravitational pull.

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Answer:

The Visible Spectrum Visible light is the light that we can see, and thus is the only light detectable by the human eye. White light is visible light, and it contains all the colors of the rainbow, from red to violet. The range of visible wavelengths is 400 to 700 nanometers.

Explanation:

Answer:

Explanation:

There are 2.

Answer:

NaOH + HCl = NaCl + H2O

(3.612 moles of HCl) x (1/1) x (39.9971 g/mol) = 144.5 grams

So answer B.

Explanation:

NaOH + HCl = NaCl + H2O

(3.612 moles of HCl) x (1/1) x (39.9971 g/mol) = 144.5 grams

To solve such this we must know the concept of double displacement reaction. Therefore, 144.48g sodium hydroxide will neutralize completely 3.612 moles of HCl.

Chemical reaction is a process in which two or more than two molecules collide in right orientation and energy to form a new chemical compound. The mass of the overall reaction should be conserved. There are so many types of chemical reaction reaction like combination reaction, double displacement reaction.

The balanced reaction is

NaOH + HCl = NaCl + H2O

To neutralize completely 3.612 moles of HCl, 3.612 moles of NaOH  is required.

mass of  NaOH =Mole× Molar mass of NaOH

mass of NaOH=3.612× 40 g/mol

mass of NaOH=144.48g

Therefore, 144.48g sodium hydroxide will neutralize completely 3.612 moles of HCl.

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Answer:

They both have a cell wall

Explanation:

Answer:

Lock her in the bathroom

Explanation:

Answer:

Ayoo

Explanation:

The total volume of gas present (in L) : 14.04 L

Reaction(balanced) :

C₂H₅OH(g) + 3O₂(g) → 2CO₂(g) + 3H₂O(l)

mol C₂H₅OH(MW=46,07 g/mol) :

[tex]\tt \dfrac{1.86}{46.07}=0.04[/tex]

mol O₂(MW=32 g/mol) :

[tex]\tt \dfrac{10}{16}=0.625[/tex]

Limiting reactant :

[tex]\tt \dfrac{0.04}{1}\div \dfrac{0.625}{3}=0.04\div 0.21\rightarrow C_2H_5OH~limiting~reactant[/tex]

mol CO₂ =

[tex]\tt \dfrac{2}{1}\times 0.04=0.08[/tex]

mol O₂(unreacted) :

[tex]\tt 0.625-(3\times 0.04)=0.505[/tex]

Conditions at T 25 ° C and P 1 atm are stated by RTP (Room Temperature and Pressure). Vm(molar volume) in this condition = 24 liters / mol

Total volume of gas :

volume O₂+volume CO₂ =

[tex]\tt 0.505\times 24+0.08\times 24=12.12+1.92=14.04~L[/tex]

Answer:

Solution-a liquid mixture in which the minor component (the solute) is uniformly distributed within the major component (the solvent).

solvent- able to dissolve other substances.

solute- the minor component in a solution, dissolved in the solvent.

colloid- a homogeneous noncrystalline substance consisting of large molecules or ultramicroscopic particles of one substance dispersed through a second substance. Colloids include gels, sols, and emulsions; the particles do not settle, and cannot be separated out by ordinary filtering or centrifuging like those in a suspension.

suspension- is a heterogeneous mixture that contains solid particles sufficiently large for sedimentation.

Explanation:

Answer:

Following are the solution to this question:

Explanation:

Following are the lewis structure of the [tex]NH_2^{-}[/tex]:

In the given element two H and one N are used, in which N has 5 valance electrons, and one H has 1 valence which is equal to 2 electrons valance. So, the graph for the given element is defined in the attached file.

The Lewis structure for the amide anion can be shown as in the given figure.

Lewis structures, also known as Lewis dot formulas, are diagrams that show the bonding between atoms of a molecule, as well as the lone pairs of electrons that may exist in the molecule.

In the given element two H and one N are used, in which N has 5 valance electrons, and one H has 1 valence which is equal to 2 electrons valance. The Lewis structure for the amide anion can be shown

Hence, this is the required answer.

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Answer: Urinary specific gravity (SG) is a measure of the concentration of solutes in the urine. It measures the ratio of urine density compared with water density and provides information on the kidney's ability to concentrate urine. A urinary specific gravity measurement is a routine part of urinalysis. A urine specific gravity test compares the density of urine to the density of water. This quick test can help determine how well your kidneys are diluting your urine. Urine that's too concentrated could mean that your kidneys aren't functioning properly or that you aren't drinking enough water.

Hope this helps..... Stay safe and have a Merry Christmas!!!!!!!!!! :D

Explanation:

Answer:

It is an amine; it contains a nitrogen atom that will allow nitrogen-hydrogen bonds to form while in water.

Explanation:

The solubility of amines owes largely to the electronegativity difference between nitrogen and hydrogen. Remember that when hydrogen is bonded to highly electronegative element such as nitrogen, intermolecular hydrogen bonding is possible with water molecules. This explains the greater solubility of amines in water.

Ether molecules do have an oxygen atom, however, and engage in hydrogen bonding with water molecules to a lesser extent compared to amines.

Also, amines participate in some acid-base reactions that lead to the formation of diethylammonium hydroxide, an ion which leads to a greater solubility of amines compared to an ether.

Hence, compound A is an amine.

Answer:

It was the last element first discovered in nature, rather than by synthesis. Outside the laboratory, francium is extremely rare, with trace amounts found in uranium and thorium ores, where the isotope francium-223 continually forms and decays

Answer:

Yes the given equation is balanced.

Explanation:

Chemical equation:

Fe + O₂       →     Fe₂O₃

Balanced chemical equation:

4Fe + 3O₂       →     2Fe₂O₃

There are four iron and six oxygen atoms on both side of equation thus the given equation is balanced.

The given reaction also follow the law of conservation of mass.

According to the law of conservation mass, mass can neither be created nor destroyed in a chemical equation.

This law was given by French chemist  Antoine Lavoisier in 1789. According to this law mass of reactant and mass of product must be equal, because masses are not created or destroyed in a chemical reaction.

This reaction is synthesis reaction:

Synthesis reaction:

It is the reaction in which two or more simple substance react to give one or more complex product.

A + B      →   AB

Answer: D) Eight

Just pretend this part doesn't exist nope nothing to see here the answer is correct on edge2020 I swear on my brainly points

Answer:

d

Explanation:

Answer:

Most aren't able to take in carbon dioxide gas from the air or produce any oxygen.

Explanation:

science bro

Answer:

Ionization Energy

Explanation:

Factors such as nuclear charge and distance of electrons to the nucleus

affect the attractive force between the nucleus of an atom and its valence

electrons.

The closer the electron to the nucleus the higher the attractive force.

Nucleus possesses an attractive force for stability which is stronger in

electrons in close proximity with it.

We should also note that the higher the nuclear charge, the stronger the

attractive force and vice versa.

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Answer:

D

Explanation:

The architectural achievement of Nebuchadnezzar II which is considered one of the Seven Wonders of the Ancient World is the Hanging Gardens of Babylon.

The Hanging Gardens were said to be a lush and elaborate terraced garden complex located in the city of Babylon, in present-day Iraq. According to ancient accounts, the gardens were built by Nebuchadnezzar II in the 6th century BCE as a gift to his wife Amytis, who missed the green hills and gardens of her homeland.

The gardens were renowned for their impressive engineering and beauty. They were designed to resemble a large artificial mountain, with ascending terraces supported by vast stone columns and arches. Each terrace was filled with a variety of plants, trees, and flowers, creating a mesmerizing display of color and fragrance.

Hence, the architectural achievement of Nebuchadnezzar II is considered one of the Seven Wonders of the Ancient World is Hanging Gardens

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Answer:

1. The mass on the periodic table.

Average atomic mass

2. Particles that differ in number between isotopes.

Neutrons

3. Vertical column in the periodic table.

Group

4. Atoms of the same element that have different masses.

Isotopes

5. All elements in the same one of these has the same number of energy levels in their electron cloud.

Period

6. The smallest form of matter that still retains the properties of an element.

Quark

Explanation:

Answer:

Explanation:

C₂E₁₀H₁₂  = 144

molecular weight of given compound

= 2 x 12 + 10 x E + 12 x 1 = 144 ( atomic weight of C = 12 , H = 1 , E = E )

24 + 10 E + 12 = 144

10 E = 108

E = 10.8

Atomic mass of E = 10.8 u .