(a) what is the total random kinetic energy of all the molecules in one mole of hydrogen at a temperature of 300 k? (b) with what speed would a mole of hydrogen have to move so that the kinetic energy of the mass as a whole would be equal to the total random kinetic energy of its molecules?

Based on the molar concentration, the volume of  FeCl₃ required is 371 mL

The mole ratio of the reaction is determined from the equation of the reaction as follows:

Equation of reaction: FeCl₃ (aq) ----> Fe³⁺ (aq) + 3 Cl⁻ (aq)

From the equation of reaction, the mole ratio of FeCl₃ to Cl⁻ is 1 : 3

The moles of chloride ions in 650 mL of  0.300 M is calculated from the formula below:

Moles of Cl⁻ ions = 0.300 * 650/100

Moles of Cl⁻ ions = 0.195

Moles of FeCl₃ required =  0.195/3

Moles of FeCl₃required = 0.065

volume of  FeCl₃ required = 0.065 / 0.175

volume of  FeCl₃ required = 0.371 L or 371 mL

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1.5 moles of H₂ are required to react completely with 14g N₂ in the chemical equation N₂ + 3H₂ ---> 2NH₃ .

This  tells us that in order to make two molecules of NH₃, we need one molecule of N₂ and three molecules of H2. To figure out how many moles (which is just a way of measuring how much of a substance you have) of H2 we need to react with 14.0 g of N₂, we can use the information from the equation.

First, we convert the 14.0 g of N₂ to moles (which means we're figuring out how many pieces of N₂ we have, because 1 mole = Avogadro's number of particles, or roughly 6.022 x 10²³).

14.0 g N₂ x (1 mol N₂/28 g N₂) = 0.5 mol N₂

Then, we use the mole ratio from the equation to figure out how many moles of H₂ we need:

0.5 mol N₂ x (3 mol H₂/1 mol N₂) = 1.5 mol H₂

So we'd need 1.5 moles of H₂ to react completely with 14.0 g of N₂.

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Here are the skeletal structures for the cyclopropane isomers with the molecular formula C5H10:

Isomer 1: N-butylcyclopropane

CH3-CH2-CH2-CH2-CH2

|

C

/

C---C

Isomer 2: Isobutylcyclopropane

CH3-CH(CH3)-CH2-CH2-CH3

|

C

/

C---C

Isomer 3: Neopentylcyclopropane

(CH3)3C-CH2-CH2-CH2-CH3

|

C

/

C---C

These structures represent the three possible isomers of cyclopropane with the given molecular formula. Each isomer has a different arrangement of atoms while maintaining the cyclopropane ring structure.

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Answer:

There were originally 8 atoms of Potassium-40.

Explanation:

The half-life of a radioactive material is the time taken for half the original material to decay or the time required for a quantity of the radioactive substance to reduce to half of its initial value.

If the original material formed without any Argon-40, it means that the atoms originally present were Potassium-40 atoms.

Presently, there are 7 Argon-40 atoms for every 1 of Potassium-40, we can deduce the number of half-lifes the Potassium-40 has undergone as follows :

After one half-life, (1/2) there will be one Potassium-40 atom for every Argon-40 atom.

After a second half life, 1/2 × 1/2 = 1/4: there will be one Potassium-40 atom for every three atoms of Argon-40.

After a third half-life, 1/4 × 1/2 = 1/8: there will be one Potassium-40 atom for every 7 atoms of Argon-40.

Since there are 1/8 atoms of Potassium-40 presently, there were originally 8 atoms of Potassium-40.

Answer:

“Newton’s Law of Gravity” gives the gravity force between two objects with masses m

and M separated by distance r:



F  G

m M

r

2

G is called the Gravitational Constant, and has the value



6.671011N m

2

kg2

(N is for

Newton, the physicists’ unit of force) or



1.51011 lbm

2

kg2

.

Let’s go back to the example given in the text: two 150 lb people separated by 1 meter.

The mass of each person is



150lb

2.2

lb

kg

 68kg

. Putting these into the formula gives



F 1.5101 1 lb m

2

kg2



(68kg)

2

(1m)

2

107

lb.

Newton’s Law of Gravity actually gives the force only between two small objects. If one

of the objects is a sphere (such as the Earth) then it turns out that you can still use the

formula, but you must use the distance to the center of the sphere as the value for r. As

an example, let’s put in numbers for a 1 kg object sitting on the surface of the Earth.

Then the force of attraction is given by the gravity equation with m = 1 kg, M = the mass

of the Earth =

24 610

kg, and r = radius of the Earth (that’s the distance to the center of

the sphere). This distance is r = 6371 km ≈

6

610

meters. Without plugging in the

numbers, can you guess what the answer will turn out to be? Guess, and then check this

footnote2

to see if you guessed correctly.

Suppose you weigh 150 lbs on the Earth. Then your mass is



150lb

2.2

lb

kg

 68kg

. What will

you weigh on the Moon? We can calculate that by using Newton’s Law of Gravity, and

putting in the M = the mass of the Moon =

22 7.310

kg, r = the radius of the moon =

6

1.710

meters. The answer is F = 25 lb. That means you will weigh 25 lb. on the

surface of the Moon.

Explanation:

hope this helps :)

Answer:

Autotrophs

Explanation:

They are responsible for the production of food. Root words "auto" for self and "troph" for food.

The experimenter should use blue light if an incident green light beam failed to cause any emitted electrons from a metal.

A negative charges subatomic particle known as an electron can either be free or attached to an atom (not bound). Among the three primary kinds of particles within an atom is an electron which is bonded to it. The other 2 are protons & neutrons.

Electrons are the electrical energy's carriers, but electrical engineers and physicists refer to current as the flow of positive charge. Protons in atoms have a positive charge, and because they are tightly bound to the atoms' nuclei, they cannot pass through a wire.

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Answer:

1.25 mL/s

Explanation:

Your are told that 25.0 mL of H2 was produced 20 seconds. This is equal to rate 25/20 = 1.25 mL/s

When a reaction progresses, the reactant concentration gradually decreases and the product concentration gradually increases. Here the rate of the reaction is 1.25 mL/s.

The rate of a chemical reaction is defined as the rate of decrease of concentration of a reactant or the rate of increase of concentration of a product. The rate of the reaction is usually expressed in units mol L⁻¹s⁻¹. The rate of the reaction are affected by several factors like concentration of the reactants, temperature, etc.

An equation which expresses the experimentally observed rate of a reaction in terms of the molar concentration of the reactants which determine the rate of the reaction is called rate equation.

Here it is seen that 25.0 mL of H2 was produced 20 seconds. So the rate is given as:

Rate = 25/20 = 1.25 mL/s

Thus the rate of the reaction is 1.25 mL/s.

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Explanation:

I first take back the numbers to their original forms that is to say (5.55×10^15) = 5550000000000000 and (8.88×10^18) = 8880000000000000000 therefore the difference of the two will be 887445 which is notated to (8.87445×10^5)

Answer: (8.87445×10^5)

The required heat in BTU, for the water at 50°C to become ice at -50°C is 209 BTU/lb.

To determine the required heat in BTU, for the water at 50°C to become ice at -50°C, we need to calculate the heat of fusion and the heat of cooling of water. We can use the following formula to calculate the required heat.

Q = mL

Where:Q is the required heat in BTU.

m is the mass of water in pounds.L is the specific heat of water at the desired temperature.

Lf is the heat of fusion of water.

Lc is the specific heat of ice.

Using the above formula, we get;

Q = mLf + mL + mLc

The heat of fusion of water is 144 BTU/lb

The specific heat of water at 50°C is 1.00 BTU/lb °F.

The specific heat of ice is 0.5 BTU/lb°F.

We know that: 1°C = 1.8°F.

So,50°C = 122°F and -50°C = -58°F

Also, the mass of water is not given, so let us assume that the mass of water is 1 lb.

Thus;

Q = mLf + mL + mLc

Q = 1(144) + 1(1.00)(122-32) + 1(0.5)(-50-0)

Q = 144 + 90 + (-25)

Q = 209 BTU/lb

Therefore, the required heat in BTU, for the water at 50°C to become ice at -50°C is 209 BTU/lb.

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The total mass of the products is 853.8 g.

We know that we have to apply the principles of stoichiometry so as to be able to obtain the mass of the mass of the products and then the total mass of the products that is obtained in the reaction.

We have that in the question; 496. 5 grams of lead II nitrate reacts with potassium bromide is such a way that the lead II nitrate would be completely consumed in the reaction. This means that the lead II nitrate is the limiting reactant in the reaction.

Number of moles of the lead II nitrate = 496. 5 grams /331 g/mol

= 1.5 moles

If 1 mole of  lead II nitrate produces 1 mole of lead II bromide

Mass of lead II bromide produced = 1.5 moles * 367 g/mol

= 550.5 g

If 1 mole of lead II nitrate produces 2 moles of potassium nitrate

1.5 moles of lead II nitrate produces  1.5 * 2 /1

= 3 moles of  potassium nitrate

Mass of  potassium nitrate = 3  moles * 101.1

= 303.3 g

Total mass produced = 550.5 g + 303.3 g

= 853.8 g

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The volume of the container will be 0.45L.

This law states that the product of volume and its pressure is constant for any gas.

Given, the Volume 1 of container 6.0L

V2 =?

Pressure 1 is 150 kPa

Increased pressure 2 is 2 atm

Temperature is constant.

By Boyle's law:

P1V1 = P2V2

\(150 \times 6 = 2\times V2 = 450\)

Thus, V2 = 0.45 L.

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15.9 moles of Ba(OH)\(_2\) would be made from 9.62 x 10²⁴. The mole signifies 6.022×10²³ units, which is a very big quantity.

In chemistry, a mole, sometimes spelt mol, is a common scientific measurement unit for significant amounts of extremely small objects like atoms, molecules, or even other predetermined particles.

The mole signifies 6.022×10²³ units, which is a very big quantity. Under the International Unit System (SI), the mole is defined as this quantity as of May 20, 2019, according the General Conference upon Weights as well as Measurements. The amount of atoms discovered via experimentation to be present in 12 kilograms of carbon-12 was originally used to define the mole.

mole = given number of particles / 6.022×10²³  

         =  9.62 x 10²⁴/ 6.022×10²³  

        = 1.59×10

          = 15.9 moles

Therefore, 15.9 moles of Ba(OH)\(_2\) would be made from 9.62 x 10²⁴.

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For the given reaction, we can classify the reactants and products as follows:

1) Stronger Brønsted-Lowry acid: C₆H₅OH (phenol)

2) Weaker Brønsted-Lowry acid: C₆H₅O⁻ (phenolate ion)

3) Stronger Brønsted-Lowry base: C₆H₁₅O₃NH (protonated triethanolamine)

4) Weaker Brønsted-Lowry base: C₆H₁₅O₃N (triethanolamine)

It is important to note that the strength of a Bronsted-Lowry acid or base is related to its ability to donate or accept a proton (H+ ion) in a chemical reaction. A stronger acid is one that can easily donate a proton, while a stronger base is one that can easily accept a proton.

In this case, C₆H₅OH is a stronger acid than C₆H₁₅O₃N because it has a more acidic hydrogen ion. Similarly, C₆H₁₅O₃NH is a stronger base than C6H5O- because it has a greater ability to accept a proton.

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Answer:

B. shape of wings

Explanation:

Insect, (class Insecta or Hexapoda), any member of the largest class of the phylum Arthropoda, which is itself the largest of the animal phyla. Insects have segmented bodies, jointed legs, and external skeletons (exoskeletons).

Higher classification: Hexapoda

True. The subscripts in a chemical formula represent the relative number of atoms of each element in a compound. They indicate the ratio of atoms present and remain constant for a given compound.

Changing the subscripts would alter the composition and stoichiometry of the compound.

forces between the negatively charged electron and the positively charged nucleus, allowing the electron to be completely removed from the atom. It is typically measured in units of electron volts (eV) or kilojoules per mole (kJ/mol). Ionization energy is influenced by factors such as the atomic structure, electron shielding, and the effective nuclear charge experienced by the outermost electrons. The ionization energy generally increases as you move across a period in the periodic table due to increased nuclear charge and decreased atomic radius. It also decreases as you move down a group due to increased electron shielding and atomic size. Ionization energy plays a crucial role in understanding chemical reactions, electron configurations, and the reactivity of elements.

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Answer:

It is called bleaching oxidation process.

Answer:

please follow me

Explanation:

eyye6ww6yeyosuyoyo6owy

(1) Here you first calculate the amount of substance from the mass and the molar mass. Then you multiply by the constant.

first: n = m / M             then: n * 6 * 10²³ = number of atoms

a) n = 4 g / 24 g/mol            number of atoms = 0,166 mol * 6 * 10²³ 1/mol

   n = 0,166 mol                   number of atoms = 0,96 * 10²³

b) n = 0,12 g / 12 g/mol       number of atoms = 0,01 mol * 6 * 10²³ 1/mol

   n = 0,01 mol                    number of atoms = 0,06 * 10²³

c) n = 32 g /48 g/mol         number of molecules = 0,666 mol * 6 * 10²³ 1/mol

   n = 0,666 mol                number of molecules = 4 * 10²³

d) n = 14,2 g / 71 g/mol      number of molecules = 0,2 mol * 6 * 10²³ 1/mol

   n = 0,2 mol                     number of molecules = 1,2 * 10²³

   Sodium sulfate has the formula Na2SO4, so it has two sodium atoms per  

   molecule. So you have to multiply the number of molecules by 2.

   number of atoms = number of molecules * 2

   number of atoms = 1,2 * 10²³ * 2

   number of atoms = 2,4 * 10²³

(2) The amount of substance can easily be calculated:

n = m / M

a) n = 16 g / 16 g/mol

   n = 1 mol

b) n = 0,14 g / 14 g/mol

   n = 0,01 mol

c) n = 5,4 g / 108 g/mol

   n = 0,05 mol

d) n = 8,88 g / 35,5 g/mol

   n = 0,25 mol

(3) With the same formula the mass can now be calculated, for this it only has to be converted according to the mass:

n = m / M      | *M

m = n * M

a) m = 0,05 mol * 16 g/mol

   m = 0,8 g

b) m = 10 mol * 23 g/mol

   m = 230 g

c) m = 0,01 mol * 1 g/mol

   m = 0,01 g

d) m = 0,25 mol * 65,4 g/mol

   m = 16,35 g

(4) The molar mass of a molecule is obtained by adding the molar masses of the individual atoms:

a) Br = 80 g/mol → Br2 = 2 * 80 g/mol = 160 g/mol

b) C = 12 g/mol, O = 16 g/mol → CO2 = 12 g/mol + 2 * 16 g/mol = 44 g/mol

c) H = 1 g/mol, N = 14 g/mol, O = 16 g/mol

  → HNO3 = 1 g/mol + 14 g/mol + 3* 16 g/mol = 63 g/mol

d) Cu = 64 g/mol, S = 32 g/mol, O = 16 g/mol,  H = 1 g/mol

   →CuSO4*5H2O = 64 g/mol + 32 g/mol + 4 * 16 g/mol + 5 * (2 * 1 g/mol +

     16 g/mol) = 250 g/mol

(5) Exercise 5 works exactly like exercise 2 and 4:

first: Calculate molar mass                    then: n = m / M

a) n = 128 g / 16 g/mol

   n = 8 mol

b) M = 39 g/mol + 14 g/mol + 3 * 16 g/mol

   M = 101 g/mol

   n = 25,25 g / 101 g/mol

   n = 0,25 mol

c) M = 2 * 12 g/mol + 6 * 1 g/mol + 16 g/mol

   M = 46 g/mol

   n = 414 g / 46 g/mol

   n = 9 mol

(6) Exercise 6 works exactly the same as exercises 3 and 4:

first: Calculate molar mass                    then: m = n * M

a) M = 32 g/mol + 2 * 16 g/mol

   M = 64 g/mol

   m = 2 mol * 64 g/mol

   m = 128 g

b) M = 2 * 1 g/mol + 32 g/mol + 4 * 16 g/mol

   M = 98 g/mol

   m = 20 mol * 98 g/mol

   m = 1960 g

c) M = 23 g/mol + 16 g/mol + 1 g/mol

   M = 40 g/mol

   m = 0,5 mol * 40 g/mol

   m = 20 g

The volume of a container is found to be 38. 5 in3. What is the volume in units of cm3?

Explanation:

631cm^3

The discovery of atomic number was most likely made between the time of Mendeleev's periodic table and Moseley's, which aided Moseley in developing his table.


Dmitri Mendeleev created the first periodic table by arranging elements in order of atomic weight in 1869. Henry Moseley's periodic table was created in 1913, about forty-four years later. The concept of atomic number was first introduced by Henry Moseley in his work on x-ray spectra in 1913. During the years between the creation of Mendeleev's and Moseley's periodic tables, there were numerous discoveries in chemistry.

Among these discoveries were radioactivity, the nature of the electron, and isotopes. However, the discovery of atomic number was critical in the development of Moseley's periodic table, which was based on the concept that each element's position in the periodic table is determined by the number of protons in the nucleus.

This approach resulted in a more precise arrangement of the elements than Mendeleev's table, which was arranged primarily based on the elements' atomic weights. As a result, the discovery of atomic number helped Moseley build his periodic table.

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Four ions with the same electronic configuration as neon are, Fluoride ion (F-) with 10 electrons and 9 protons, Sodium ion (Na+) with 10 electrons and 11 protons, Magnesium ion (Mg2+) with 10 electrons and 12 protons, Aluminum ion (Al3+) with 10 electrons and 13 protons.

The electronic configuration of neon is 1s2 2s2 2p6, which means it has 10 electrons in total. The ions listed above have lost electrons to achieve a stable electronic configuration, similar to that of neon. The fluoride ion (F-) has gained one electron to achieve a stable octet, while the sodium ion (Na+), magnesium ion (Mg2+), and aluminum ion (Al3+) have lost one, two, and three electrons, respectively, to achieve the stable electronic configuration of neon.

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Answer:

It contains chemical potential energy.

Explanation:

Answer:

A balanced ionic equation shows the reacting ions in a chemical reaction. These equations can be used to represent what happens in precipitation reactions or displacement reactions.

Precipitation reactions

In a typical precipitation reaction, two soluble reactants form an insoluble product and a soluble product.

For example, silver nitrate solution reacts with sodium chloride solution. Insoluble solid silver chloride and sodium nitrate solution form:

AgNO3(aq) + NaCl(aq) → AgCl(s) + NaNO3(aq)

The Na+ ions and NO3- ions remain separate in the sodium nitrate solution and do not form a precipitate. Ions that remain essentially unchanged during a reaction are called spectator ions.This means these can be ignored when writing the ionic equation. Only how the solid silver chloride forms is needed to be shown:

Ag+(aq) + Cl-(aq) → AgCl(s)

In a balanced ionic equation:

the number of positive and negative charges is the same

the numbers of atoms of each element on the left and right are the same

Displacement reactions

Displacement reactions take place when a reactive element displaces a less reactive element from one of its compounds.

A common type of displacement reaction takes place when a reactive metal reacts with the salt of a less reactive metal. For example, copper reacts with silver nitrate solution to produce silver and copper(II) nitrate solution:

2AgNO3(aq) + Cu(s) → 2Ag(s) + Cu(NO3)2(aq)

In this reaction, the NO3- ions remain in the solution and do not react - they are the spectator ions in this reaction. So, they can be removed from the ionic equation:

2Ag+(aq) + Cu(s) → 2Ag(s) + Cu2+(aq)

Question

Explain why this ionic equation is balanced:

Ba2+(aq) + SO42-(aq) → BaSO4(s)

Hide answer

There are the same numbers of atoms of each element on both sides of the equation. The total charge on both sides is also the same (zero).

Question

Balance this ionic equation, which represents the formation of a silver carbonate precipitate:

Ag+(aq) + CO32-(aq) → Ag2CO3(s)

Hide answer

2Ag+(aq) + CO32-(aq) → Ag2CO3(s)

Question

Balance this ionic equation, which represents the displacement of iodine from iodide ions by chlorine:

Cl2(aq) + I-(aq) → I2(aq) + Cl-(aq)

Hide answer

Cl2(aq) + 2I-(aq) → I2(aq) + 2Cl-(aq

Explanation:

this will help, I used this for my work x

AgNO₃ (aq) + NaCl (aq) → AgCl (s) + NaNO₃(aq) is the complete chemical equation taking place between the 2 reactants.

Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.

A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .

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False ,  all compounds that have a plane of symmetry are  not known as meso compounds

Meso compounds or isomers are optically inactive members of a group of stereoisomers, at least two of which are optically active. This means that a molecule is not chiral even if it contains two or more stereocenters.

A meso compound is "superimposable" on its mirror image (not to be confused with superimposability, as any two objects, identical or not, can be superimposed). Two objects can be superimposed if all sides of the objects are coincident and do not produce "(+)" or "(-)" readings when analyzed with a polarimeter.  The name comes from the Greek mésos, meaning "middle".

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Answer:

yes

Explanation:

because I think it is correct fo u

The correct answer is (A) colorless solution and a white precipitate.

When aqueous HCl and Na2SO3 are mixed, a chemical reaction takes place. The HCl reacts with the Na2SO3 to form sodium hydrogen sulfite (NaHSO3) and hydrogen chloride gas (HCl). The balanced chemical equation for this reaction is:

2 HCl (aq) + Na2SO3 (aq) → 2 NaHSO3 (aq) + H2(g)

The white precipitate that forms is NaHSO3, which is insoluble in water. The colorless solution is the remaining aqueous solution of NaCl and NaHSO3. Gas evolution is also observed, as HCl reacts with Na2SO3 to form H2 gas.

It's important to note that no prescription is needed for these chemicals, but they should still be handled with care and appropriate safety precautions should be taken.

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Answer:

78.003558

Explanation:

To find the mass percent composition of an element, divide the mass contribution of the element by the total mass then multiply by 100.

The total mass = 200.0 g

Phosphorus mass = 87.28 g

Oxygen mass = 112.72 g

%composition of P:

=> (87.28 g/200.0g)*100

=> 43.64 %

%composition of O:

=> (112.72g/200.0 g)*100

=> 56.36 %

Answer:

bruh, just go in your bathroom and look for cleaning products

Explanation: