Please help me answer this question about fullerenes. 30 points available and brainliest.

Based on the chemical equation, to balance the equation we use 2 as a coefficients of HCl on left hand side of reaction.

Balanced chemical equations are those equation in which each entities are present in same amount on left side as well as on the right side of the chemical reaction.

Given chemical reaction is:

Zn + HCl → ZnCl₂ + H₂

Above reaction is not balanced equation as number of chlorine and hydrogen atoms are not same, so balanced equation will be:

Zn + 2HCl → ZnCl₂ + H₂

Hence we add 2 as a coefficient of HCl to balance the equation.

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Answer:

1 2 1 1

Explanation:

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Answer:

The three most stable isotopes of hydrogen: protium (A = 1), deuterium (A = 2), and tritium (A = 3).

Protium, the most common isotope of hydrogen, consists of one proton and one electron. ...

A deuterium atom contains one proton, one neutron, and one electron.

Explanation:

Answer:

A I DID THIS BEFORE

Explanation:

Let's check

[tex]\\ \rm\Rrightarrow C_4H_{2(4)-2}[/tex]

[tex]\\ \rm\Rrightarrow C_4H_{8-2}[/tex]

[tex]\\ \rm\Rrightarrow C_4H_6[/tex]

So

Option B

Answer:

461.91 Kelvin

Explanation:

P = 7.30 atm

V = 21.7 liters

n = 4.15 moles

R = 0.0821 atm

T = ?

PV = nRT

(7.30) (21.7) = (4.15) (0.0821) (T)

158.41 = 0.34 (T)

T = 465.91 Kelvin

The ideal gas law is equivalent to Charles's law when number of moles and pressure are constant (option D)

PV = nRT

Where

Charles' law states as follow:

V₁ / T₁ = V₂ / T₂

Where

PV = nRT

Divide both side by T

PV / T = nR

Divide both side by P

V / T = nR / P

Let nR / P be costant

V / T = constant

Thus,

V₁ / T₁ = V₂ / T₂

From the above illustrations, we can conclude that the ideal gas equation will become Charles' law equation if the number of mole and pressure are constant (Option D)

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Answer:

Barium is lower in group 2 than magnesium, so number of shells increase. The valence electron is further from the nucleus making it easier to lose electrons.

Explanation:

Barium has more electrons shells than calcium, so the nuclear shielding is stronger, and the outmost electrons are further away from the nucleus. This results in a weaker attractive force between the electron and the nucleus, so a smaller energy is required to remove it.

Answer:

Barium has a greater radius than magnesium

Explanation:

Barium and magnesium are two elements which belong to the same group, group 2A. This means that the two elements have two valence electrons in their outer shell.

The difference is, however, since barium

is lower in group than magnesium, it has

more electron shells than magnesium and,

therefore, its radlus is greater. The attraction

force between the nucleus and the valence

electrons in barium is lower as a result, as force

is inversely proportional to distance. Hence, a

lower amount of energy is required to remove

the valence electrons from barium.

Explanation:

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Now

Done!

We know

[tex]\boxed{\sf 1atm=760mmHg}[/tex]

So convert now

From the information, the vapor density of gas X is obtained as 8. The vapor density is half of the relative molecular mass  of the compound.

The term vapor density is defines as half of the relative molecular mass of a compound. Now we have the relative molecular mass of the compound as 16.

It the follows that the vapor density of the compound must be 16/2. Hence, the vapor density of the diatomic gas X is 8.

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The equilibrium concentration of CH3OH will be equal to 0.089 if the equilibrium concentration of co is 3.4 × 10–1 m, and the equilibrium concentration of h2 is 6.8 × 10–1 m

An equilibrium concentration is a state when the rate of forward reaction in a chemical reaction becomes equal to the rate of backward reaction

Step 1:

The balanced equation for the reaction is given below:

H2O + Cl2O <=> 2HClO

Step 2:

Data obtained from the question. This includes:

Concentration of H2O, [H2O] = 0.077 M

Concentration of Cl2O, [Cl2O] = 0.077 M

Concentration of HClO, [HClO] = 0.023 M

Equilibrium constant, K =?

Step 3:

Determination of the equilibrium constant. This is illustrated below:

The equilibrium constant for the above reaction is given below:

K = [HClO]^2 / [H2O] [Cl2O]

K = (0.023)^2 / (0.077 x 0.077)

K = 0.089

Therefore, the equilibrium constant for the above reaction is 0.089

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The correct equilibrium constant expression for the given chemical reaction is Keq = [Cu²⁺] / [Ag⁺]².

Equilibrium constant of any reaction at the equilibrium state will be define as the ratio of the concentration of products to the concentration of the reactants.

Given chemical reaction is:

Cu(s) + 2Ag⁺(aq) ⇄ Cu²⁺(aq) + 2Ag(s)

Equilibrium constant for the above reaction will be written as:

Keq = [Cu²⁺][Ag]² / [Cu][Ag⁺]²

But in the above reaction at the product side silver is present in pure solid form and at the reactant side copper is present in pure solid form and concentration of these elements equals to one in equilibrium state, so that equation becomes:

Keq = [Cu²⁺] / [Ag⁺]²

Hence equilibrium expression for given reaction is Keq = [Cu²⁺] / [Ag⁺]².

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Answer: D

Keq = [Cu²⁺] / [Ag⁺]²

Answer:

a. .125 mol b. 7.25g

Explanation:

a. To get the moles multiply the volume by the molarity.

.5L*.25M=.125mol NaCl

b. The molar mass is provided so multiply the moles by the molar mass to get the amount of grams of nacl.

.125mol*58molar mass=7.25g nacl to make the solution

Answer:

molting allows for this adaptaion.

its fur slowly changes color

thanks!

Explanation:

Answer:

The differences between the Florida's weasel and in Wyoming's is that I can see that in Wyoming it has a lot of snow so Wyoming's weasel fur is more thicker than Florida's weasel.

Explanation:

Overmore, in Florida's weasel the weasel's fur is much more less then Wyoming's weasel's fur. Subsequently, their fur color is very different. In Wyoming's weasel fur, it's white fur help them blend in the snow. In Florida's weasel fur, it's brown and help blend in the grass(soil).

exothermic reaction is reactants accomphen by evolution of heat

Explanation:

D mole is a power. .......

[NOBr]2/[NO]2[Br2] is the equilibrium expression for 2NO+Br2⇌2NOBr. Therefore, the correct option is option D.

When the observable qualities, such as colour, pressure, temperature, concentration, etc. do not vary, the process is said to be in equilibrium. As "balance" is the definition of the word "equilibrium," it follows because a chemical reaction reflects a balance among the substances and outcomes involved in the reaction.

In some physical processes, such as the melting of ice at 0°C, where both the two substances are present at equilibrium, the equilibrium state can also be observed. Physical equilibrium refers to the equilibrium that results from physical processes like the melting of solids.  [NOBr]2/[NO]2[Br2] is the equilibrium expression for 2NO+Br2⇌2NOBr.

Therefore, the correct option is option D.

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Answer:The mass of each planet is less than that of the Sun, so they all orbit the Sun.

Explanation:

Bitter taste, high pH, and caustic Bitter are the characteristics of base.

Bases have bitter taste, soapy feel, turn red litmus paper blue. Bases are substances that contain metal oxides or hydroxides. Its pH is higher than 7 up to 14.

So we can conclude that bitter taste, high pH, and caustic Bitter are the characteristics of base.

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Answer:

Bitter taste, high pH, and caustic

Explanation:

I took the test :)

The fraction of parafin wax and asaphalt is diesel oil

Fractional distillation is the process by which crude oil are separated in to different form base on their molecular weight and boiling points by petroleum refineries .

parafin wax and asaphalt is use for making roads and candles.

Therefore, The fraction of parafin wax and asaphalt is diesel oil.

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Explanation:

Decay of Uranium-238 produces gamma radiaton whereas decay of thorium-234 releases beta radiation.

In the decay of U-238, two gamma rays of different energies are emitted in addition to the alpha particle while on the other hand, in the decay of thorium-234 , beta rays are emitted.

So we can conclude that decay of Uranium-238 produces gamma radiaton whereas decay of thorium-234 releases beta radiation.

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Answer:

Yes its

C. During the radioactive decay, alpha particles are released. These positive particles are attracted to the negative plate in the electric field.

Explanation:

Just got it right on USATP

Answer:

Milk's boiling temperature is nearly identical to that of water, 100 degrees Celsius (212 degrees Fahrenheit)

Explanation:

Taking into account the reaction stoichiometry, f 66.38 g of potassium chloride reacts with fluorine and produces potassium fluoride and chlorine, 0.4452 moles of chlorine is produced.

In first place, the balanced reaction is:

2 KCl + F₂ → 2 KF + Cl₂

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

The molar mass of the compounds is:

Then, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:

The following rule of three can be applied: if by reaction stoichiometry 149.1 grams of KCl form 1 mole of Cl₂, 66.38 grams of KCl form how many moles of Cl₂?

[tex]amount of moles of Cl_{2} =\frac{66.38 grams of KClx1 mole of Cl_{2}}{149.1 grams of KCl}[/tex]

amount of moles of Cl₂= 0.4452 moles

Then, if 66.38 g of potassium chloride reacts with fluorine and produces potassium fluoride and chlorine, 0.4452 moles of chlorine is produced.

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Answer:

Both are continental shelf's.

Explanation:

A continental shelf is the shallow underwater extension of land surrounding a continent. It makes up the edge of a landmass, even though it is under water. At some points in the Earth's past, many underwater continental shelves were once a part of dry land.

Arrhenius: an acid is a substance which when dissolved in water will release H⁺ ions.

HₓY(aq) ⇒ xH⁺(aq) + Yˣ-(aq)

The quantity of floor needed by the Isaac for making the cake will be equal to 165.844575 gram

Unit conversion is a multi-step process that involves multiplication or division by a numerical factor, selection of the correct number of significant digits, and rounding.

Given that

1 oz =28.3495 gram

Therefore 5.85 oz will give x gram

X gram is what we are looking for

X gram= 5.85 oz× 28.3495g/1

Xg= 165.844575 gram

Approximately 165.8446 gram

Thus, Isaac needs to add 165.8446g of flour to the mixture to make 5.85 oz

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Answer:

Dispersion forces are present between all molecules, whether they are polar or nonpolar. Larger and heavier atoms and molecules exhibit stronger dispersion forces than smaller and lighter ones.

Explanation:

hope this helps

Answer

Electromagnetic waves.

Explanation: Waves that Move through matter only are called Mechanical waves. Waves that move through space only are called electromagnetic waves.