What is an example of a polyatomic ion

Answer:

The mole ratio of the cation and the anion in a precipitate is a simple fraction. ( im sorry if this dosent help a lot.)

Explanation:

The organic materials which are present in all organisms in the form of DNA or RNA are called nucleic acids. It is the basic genetic material of our body.

The group of molecules which are responsible for carrying and transmitting the hereditary characters or the genetic information from parents to the offsprings is known as Deoxy-ribonucleic acid or DNA.

The DNA is a polynucleotide molecule, the polypeptide chains are further folded in secondary, tertiary and quaternary structures to form different proteins. Every organism contains many genes in its DNA, different types of proteins can be formed.

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Answer:

Dogs naturally lose old or damaged hair by shedding. Although shedding. and yes

Answer:

1.1 mol/liter

Explanation:

You would use the M1V1 = M2V2 equation to solve this.

We know M1 is 3.0 M, V1 is 25 milliliters, and V2 is 68 milliliters. We need to find M2.

To find M2, first plug in what you know.

(3.0 M)(25 mL) = M2(68 mL)

Then, divide everything by 68 mL to get M2 by itself

Your answer should be a quite large decimal but I rounded it to 1.1 mol/liter.

Answer:

The concentration of sodium chloride is 1.1 moles/liter.

Explanation:

Answer:

Explanation:

Given;

pH of the solution = 4.33

H₃O+ is calculated as;

pH = -log[H₃O⁺]

4.33 = -log[H₃O⁺]

-4.33 = log[H₃O⁺]

10⁻⁴°³³ = [H₃O⁺]

[tex]Thus, [H_3O^+] = 1 *10^{-4.33}[/tex] M

[OH⁻] is calculated as;

[H₃O⁺] x [OH⁻] = 10⁻¹⁴

10⁻⁴°³³ x [OH⁻] = 10⁻¹⁴

[tex][OH^-] = \frac{10^{-14}}{10^{-4.33}} = 10^{-9.67}\\\\Thus, [OH^-] = 1*10^{-9.67} \ M[/tex]

pOH of the solution is calculated as;

pOH  +  pH = 14

pOH  + 4.33 = 14

pOH  = 14 - 4.33

pOH = 9.67

Thus, pOH of the solution is 9.67

Summary of the calculation:

Answer: The rate at which a vibration occurs that constitutes a wave, either in a material (as in sound waves), or in an electromagnetic field (as in radio waves and light), usually measured per second. Also it is measured in Hertz.

Explanation:

Answer frequency is the number of occurrences of a repeating event per unit of time. Frequency is measured in Hertz. Unit frequency is measured as the number of wave cycles that occur in one second.

The unit of frequency measurement is hertz

Explanation:

Answer:

For this angular momentum, no quantum number exist

Explanation:

From the question we are told that

   The magnitude of the angular momentum is  [tex]L = 6\sqrt{\frac{h}{2 \pi} }[/tex]

The generally formula for Orbital angular momentum is mathematically represented as

           [tex]L = \sqrt{(l * (l + 1)) } * \frac{h}{2 \pi}[/tex]

Where [tex]l[/tex] is the quantum number

now  

We can look at the given angular momentum in this form as

      [tex]L = 6\sqrt{\frac{h}{2 \pi} } = \sqrt{36} * \sqrt{\frac{h}{2 \pi}} }[/tex]

comparing this equation to the generally equation for Orbital angular momentum

     We see that there is no quantum number that would satisfy this equation

Answer:

. All redox reactions occur with a simultaneous change in the oxidation numbers of some atoms. At least two elements must change their oxidation numbers. When an oxidation number of an atom is increased in the course of a redox reaction, that atom is being oxidized

Explanation:

Answer:

15 mL

Explanation:

Please see the step-by-step solution in the picture attached below.

Hope this answer can help you. Have a nice day!

Answer:

nickel 48.1063%

Phosphorus 16.9245%

Oxygen 34.9692%

The percent composition of each element like nitrogen, oxygen and phosphorous in Ni₃(PO₄)₂ are 48.03%, 34.97% and 16.93% respectively.

Percent composition of any element present in any compound will be calculated as:
% comosition = (Mass of element / Mass of compound)×100%

Mass of Ni₃(PO₄)₂ compound = 366.02 g/mol

Molar mass of 3 Nitrogen atoms = 3×58.6 = 175.8 g/mol

Moar mass of 2 Phosphorous atoms = 2×31 = 62 g/mol

Moar mass of 8 Oxygen atoms = 8×16 = 128 g/mol

% comosition of Nitrogen = (175.8/366.02)×100% = 48.03%

% comosition of Oxygen = (128/366.02)×100% = 34.97%

% comosition of Phosphorous = (62/366.02)×100% = 16.93%

Hence % composition of nitrogen, oxygen and phosphorous is 48.03%, 34.97% and 16.93% respectively.

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Answer:

A cell membrane. A cell structure that controls which substances can enter or leave the cell. (found in all cells) In cells with cell walls, the cell membrane is located just inside the cell wall. In other cells, the cell membrane forms the outside boundary that separates the cell from its environment.

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Answer:

Option B is correct.

0.119 mole of Kr has a mass of 10.0 g

Explanation:

The complete Question was ontained online, albeit, it was incomplete, even from the online source. But the solution is possible based on the part of the question obtained.

Complete Question

Which of the following Noble Gases has a mass of 10.0 g?

A. 2.02 mol Ne B. 0.119 mol Kr C.

Solution

Number of moles = (Mass)/(Molar Mass)

Mass = (Number of moles) × (Molar mass)

Checking the options, one at a time,

A. 2.02 moles of Neon

Number of moles = 2.02 moles

Molar Mass of Neon = 20.1797 g/mol

Mass = 2.02 × 20.1797 = 40.762994 g ≠ 10.0 g

Not the answer.

B. 0.119 moles of Krypton

Number of moles = 0.119 moles

Molar Mass of Krypton = 83.798 g/mol

Mass = 0.119 × 83.798 = 9.971962 g ≈ 10.0 g

This is definitely the answer.

Hope this Helps!!!

Answer: 0.119 mol Kr

Explanation:

Answer:

kmno4 is heated => k2mno4 + mno2 + o2

Hope this helps!

:)

Answer:

The concentration of the solution is 2 g/dm³

Explanation:

The equation used to find the concentration of a solution is "c = m/v"

C= concentration

M= mass

V= volume

The question asks for the answer to be in decimeters, so you need to 100 cm³ to dm³. To do this, you divide 100 by 10, giving you 10 cm³. Then you just plug in your numbers into the formula: c = 20g/10dm³.

The concentration of the potassium chloride solution has been [tex]\rm 2\;\times\;10^-^3\;g/dm^3[/tex].

The concentration has been defined as the mass of sample present in a definite volume of the solution. The concentration has been given by the moles, molarity, g/ml, g/L etc.

The concentration attained by the student has been by dissolving 20 g of KCl in [tex]\rm 100\;cm^3[/tex] water has been given in [tex]\rm g/cm^3[/tex] as:

[tex]\rm \dfrac{g}{cm^3}=\dfrac{20\;g}{100\;cm^3}\\ \dfrac{g}{cm^3}=0.2\;g/cm^3[/tex]

The concentration of the solution obtained by the student has been [tex]\rm 0.2\;g/cm^3[/tex].

The conversion of [tex]\rm cm^3\;to\;dm^3[/tex] has been given as:

[tex]\rm 1\;g/cm^3=0.001\;g/dm^3[/tex]

The concentration of [tex]\rm 0.2\;g/cm^3[/tex] solution has been given as:

[tex]\rm 1\;g/cm^3=0.001\;g/dm^3\\0.2\;g/cm^3=0.2\;\times\;0.001\;g/dm^3\\0.2\;g/cm^3=2\;\times\;10^-^3\;g/dm^3[/tex]

The concentration of the potassium chloride solution has been [tex]\rm 2\;\times\;10^-^3\;g/dm^3[/tex].

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Answer:

A. Move the buret clamp to a ring stand with a larger base.

Explanation:

The ring stands are used to hold burettes, light in weight to avoid loss of stability, that is why it is necessary to change the size of the ring stand so that it can support the buret that we are going to use.  It is not recommended to balance it with the hand since it would give us an inaccurate result in the titration.

In order to stabilize the set-up, one has to move the buret clamp to a ring stand with a larger base.

In conclusion, the correct option is A.

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Answer:

c

Explanation:

¨Halogens being non metals have greater electronegativities hence, attract electrons and making the statement disputed. Nobel gases are highly stable; this explains why they are nonreactive. They do not form chemical bonds because they only have a little tendency to either gain or lose an electron; on the other hand, halogens are reactive because they only need one additional electron to complete their octet. ¨

i found that from another users answer for the same question

Answer:

answer c

Explanation:

The right answer is Proton.

Additional Information:

There are three types of subatomic particles. They are:

Proton is a positively charged particle,Electron is negatively charged particle and Neutron is charge less.

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Answer:

B

Explanation:

sight, hearing, smell, taste and touch

Answer:

Most easiest answer..

There are 5 senses in human body.☺️

Answer:

option c

Explanation:

ffuunkie. tfnhc dhrhrjebrjeieie

Answer:A

Explanation:

Answer: A

Explanation:

Answer:

The particle represented by X(aq) is  A) H₂PO₄⁻(aq)

Explanation:

According to the Brønsted-Lowry Theory, a base is a substance capable of accepting protons (H⁺) in solution. Conversely, a substance acts as an acid if it acts as a proton donor.

A proton transfer then occurs, requiring the presence of a proton donor (an acid) and a base that accepts them.

When an acid gives up a proton, it becomes an anion, generating a conjugate base. That is, a conjugate base is an ion or molecule resulting from the acid that loses the proton. Conversely, a conjugated acid is an ion or molecule resulting from the base that the proton gains.

In this NH₃ / NH₄⁺ pair that NH₄⁺ is the conjugate acid of the NH₃ base, the latter acting as a base since it accepts a proton. H₃PO₄ then acts as an acid, yielding a proton and generating the conjugate base H₂PO₄⁻.

So, the particle represented by X(aq) is  A) H₂PO₄⁻(aq)

Answer:

A) FeCl₃

Explanation:

The only unclear part here is what the product is meant to be.  But, I will put in the limiting reactant for both cases.

4 FeCl₃  +  3 O₂  ⇒  2 Fe₂O₃  +  3 Cl₂

For Fe₂O₃:

Use the stoichiometry from the chemical equation to solve this problem.  

You need 4 moles of FeCl₃ to make 2 moles of Fe₂O₃.

8 × (2/4) = 4 moles

You need 3 moles of O₂ to make 2 moles of Fe₂O₃.

8 × (2/3) = 5.3 moles

Since FeCl₃ made less product, it is the limiting reactant.

For Cl₂:

Do the same as above.

You need 4 moles of FeCl₃ to make 3 moles of Cl₂.

8 × (3/4) = 6 moles

You need 3 moles of O₂ to make 3 moles of Cl₂.

8 × (3/3) = 8 moles

Since FeCl₃ made less product, it is the limiting reactant.

Answer:

A) FeCl₃

Explanation:

Hope this helps

Answer:

Renewable energy

Explanation:

on the other hand, typically emits less CO2 than fossil fuels. In fact, renewables like solar and wind power—apart from construction and maintenance—don't emit any CO2 at all. With renewable energy, you can breathe easier, stay cooler, and create a more comfortable world for generations to come.

Answer:

renewable energy comes from natural resources that can be replenished or replaced during an average human lifetime ; eg, Hydro, solar, wind etc.

fossil fuels can take thousands or even millions of years to naturally replenish; eg, natural gas, coal, oil.

Answer:

Membrane

Explanation:

Unlike a bacteria , an animal cell contains membrane which bounds organelles.

Answer: A. They show the oxidation and reduction halves of a reaction.

Explanation:

Oxidation-reduction reaction or redox reaction is defined as the reaction in which oxidation and reduction reactions occur simultaneously.

For a redox reaction: [tex]A+B^+\rightarrow A^++B[/tex]

Oxidation reaction is defined as the reaction in which a substance looses its electrons. The oxidation state of the substance increases.

oxidation half at anode : [tex]A\rightarrow A^++e^-[/tex]

Reduction reaction is defined as the reaction in which a substance gains electrons. The oxidation state of the substance gets reduced.

reduction half at cathode:  [tex]B^++e^-\rightarrow B[/tex]

Half-reactions show the oxidation and reduction halves of a reaction. The correct answer is option A.

Oxidation is a chemical reaction that involves the loss of electrons by a molecule, atom, or ion. This process results in an increase in the oxidation state of the species undergoing oxidation.

Half-reactions are used to show the oxidation and reduction half of the reaction separately, which makes it easier to balance the overall reaction and to identify the species that are being oxidized and reduced.

In conclusion, half-reactions are used to show the oxidation and reduction halves of a redox reaction separately. Option A is the correct answer.

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Answer:

Beta

Explanation:

Beta has signal 0 above and -1 under

Answer:

Lithospheric plates are regions of Earth's crust and upper mantle that are fractured into plates that move across a deeper plasticine mantle. Earth's crust is fractured into 13 major and approximately 20 total lithospheric plates.

Explanation:

I hope this helps