which of the following is the only list representing natural components of the atmosphere

18 electrons.

According to the question, we have that sulphur has 16 electrons and after bonding with magnesium acquired a 2-charge. The sulphur ion S2- shows that sulphur has gained 2electrons to become stable.

Amount of electron S2- have = 16 electron + 2electrons

Amount of electron S2- have = 18 electrons

Hence the number of electrons S2- ion have is 18 electrons.

The total pressure of the gases that reacted to produce ammonia is 22 Pa.

Considering the following balanced equation of the Haber process;

N₂(g) + 3 H₂(g) ----> 2 NH₃(l)

According to the balanced equation, 34.0 g of NH₃ are produced by 1 mol of N₂ as the molar mass of NH₃ is 17g/mol

Now calculating for 170 g of NH₃ as follows;

170g NH₃  × ( 1 mol N₂ / 34 g of NH₃) = 5 mol N₂

Similarly; According to the balanced equation, 34.0 g of NH₃ are produced by 3 moles of H₂, therefore calculating for 170 g of NH₃ as follows;

170g NH₃  × ( 3 mol H₂ / 34 g of NH₃) = 15 mol H₂

The total gaseous moles before the reaction were;

5.00 mol + 15.0 mol = 20.0 mol.

Now we can determine the total pressure (P) by using the ideal gas equation.

P.V = n.R.T

where

V is the volume (50.0 L)

n is the number of moles (20.0 mol)

R is the ideal gas constant (0.08206atm.L/mol.K)

T is the absolute temperature (400.0 + 273.15 = 673.2K)

P = n.R.T / V

P = (20.0 mol × 0.08206atm.L/mol.K × 673.2K) / 50 L

P = 22 atm

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The properties of the given element, Pb, is as follows:

The periodic table is an arrangement of the elements in increasing order of atomic number.

The atoms of elements are composed of three sub-atomic particles;

The element Lead, Pb,  is a metallic element found in the periodic table and has an atomic number of 82 and an average atomic mass of 207.2

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The convection currents happen in the mantle, option C.

The statement is correct about the movement of plates that sit on top of the mantle is option D.They regularly move because of the convection currents of oceans.

The statement that is correct about the flow of thermal energy inside Earth is optionB. Energy flow inside the crust causes magma to rise.

The result of boundary plates colliding or sliding past each other is option B. earthquakes occur

Convection currents can be identified in the Earth's mantle wherby the materials that are been heated which is the mantle material will be rising from deep inside the mantle, then the cooler mantle material will definitely sinks which will bring about the convection current.

It should be noted that the Transform boundaries which is as a result of the sliding of the plates   could results in shallow earthquakes.

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Answer: Where do convection currents happen?

Responses= mantle

Which statement is correct about the movement of plates that sit on top of the mantle= They regularly move because of the convection currents of magma.

Which statement is correct about the flow of thermal energy inside Earth= Energy flow inside the mantle causes magma to rise.

Which is a result of boundary plates colliding or sliding past each other= earthquakes occur

Explanation: I took the test

Answer:

d

Explanation:

exotic species, took this last week.

Answer:

The Dog

Explanation:

The more mass something has the more kinetic energy it has in it.

Answer:

it's sample c yh it is true

Answer:

1.36x10^15 Hertz

Explanation:

The wavelength, λ, and frequency, ν, of light are described by the equation:

c = λν

where c is the speed of light (c = 3.0x10^8 m/s)

We are given the wavelength, λ, as 220nm

We'll need this in meters, not nanometers, nm.  

1nm = 10^-9m

(220nm)*(10^-9m/nm) = 2.20x10^-7m

v = c/λ

v = (3.0x10^8 m/s)/(2.20x10^-7m) = 1.36x10^15/s or Hertz  (1360 terahertz)

Answer: The end result is thermal equilibrium.

Explanation: When two objects are touching for a specific period of time heat [thermal energy] always moves from a warmer substance to a cooler substance. In your case we have two objects of unknown temperature. The temperature between those objects is transferred/ conducted. Eventually, the heat conduction between two objects of unknown temperature results in the achievement of thermal equilibrium.

Answer: Thermal equilibrium

Explanation :Heat will transfer thermal energy from the object at higher temperature to the one at lower temperature until they both reach the same temperature. The objects are then in thermal equilibrium, and no further temperature changes will occur if they are isolated from other systems. The systems interact and change because their temperatures are different, and the changes stop once their temperatures are the same. Thermal equilibrium is established when two bodies are in thermal contact with each other—meaning heat transfer (i.e., the transfer of energy by heat) can occur between them. If two systems cannot freely exchange energy, they will not reach thermal equilibrium. (It is fortunate that empty space stands between Earth and the sun, because a state of thermal equilibrium with the sun would be too toasty for life on this planet!)

Answer:

True

Explanation:

Answer:

True

Explanation:

A neutral atom must have an equal amount of protons as electrons.  

The average atomic number will be 1616.29.

The Average Atomic Mass =  (Mass of Isotope 1 x Fractional Abundance of Isotope 1) + (Mass of Isotope 2 x Fractional Abundance of Isotope 2)+ (Mass of Isotope 3x Fractional Abundance of Isotope 3)

Given,

X-16

X-17

X-18

Abundance (%)

99.76

0.04

0.20

Atomic Mass

15.9949

16.9991

17.99

Average Atomic mass= (15.9949x99.76)+(16.9991x0.04)+(17.9992x0.20)

 =1616.29

Therefore, average atomic mass of the fictional element "X" is 1616.29

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1. 2 moles of nitrogen reacting with an excess of hydrogen will produce moles of ammonia6 moles  [tex]NH_3[/tex].

2. The number of moles of nitrogen needed to completely react with 12 moles of hydrogen is 4 moles.

3. 30 molecules of hydrogen reacting with an excess of nitrogen will produce 20 molecules of ammonia.

The balanced equation of the reaction between hydrogen and nitrogen to produce ammonia is as follows:

[tex]N_2 + 3H_2 -- > 2NH_3[/tex]

This means that the mole ratio of [tex]N_2[/tex] to [tex]H_2[/tex] to [tex]NH_3[/tex] is 1:3:2.

       1 mol  [tex]N_2[/tex] = 2 mol  [tex]NH_3[/tex]

       3 mol  [tex]N_2[/tex] = 3 x 2

                        = 6 moles  [tex]NH_3[/tex]

        3 mol [tex]H_2[/tex] = 1 mol [tex]N_2[/tex]

        12 mol [tex]H_2[/tex] = 12 x 1/3

                          = 4 moles [tex]N_2[/tex]

         3 mol [tex]H_2[/tex] = 2 mol  [tex]NH_3[/tex]

        30 mol  [tex]H_2[/tex] = 30 x 2/3

                           = 20 moles [tex]NH_3[/tex]

In other words, the problem is solved from the balanced equation of the reaction.

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The concentration of nitrate ion in the final solution is 0.48 M.

An abundance of a constituent divided by the total volume of a mixture is known as concentration. There are various types of concentrations: Mass, molar, number, and volume. The quantity of a solute found in the given amount of solution is the concentration of the substance. Concentration is expressed in terms of molarity.

Molarity means the number of moles per litre. The unit symbol is mol / L or mol / dm³ in the SI unit.

To calculate the concentration of the solution,

                     [tex]C_{1}V_{1} + n C_{2}V_{2} = C * total volume[/tex]       →   1

where,   [tex]C_{1}[/tex]  =  concentration of the starting solution

              [tex]C_{2}[/tex]  =  concentration of the desired solution

               [tex]V_{1}[/tex]  =  volume of the starting solution

               [tex]V_{2}[/tex]  =  volume of the desired solution

As per the question,

Substitute the values in 1,

⇒      [tex]C_{1}V_{1} + n C_{2}V_{2} = C * total volume[/tex]

⇒      0.255 × 0.035 + 2 × 0.328 × 0.045  =  C × 0.08

⇒      0.008925 + 2 × 0.01476  =  C × 0.08

⇒      0.008925 + 0.02952  =  C × 0.08

⇒      C × 0.08  =  0.038445

⇒      C   =  0.038445 /  0.08

⇒      C   =  0.4805625

Therefore, 0.48 M is the concentration of the Nitrate ion in the final solution.

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An aquifer is a geological formation that stores water. they are higher than the surrounding terrain, which can lead to springs or artesian wells that are in motion. An aquifer can be a well, spring, lake ,etc.

Water collects in geological formations called aquifers, frequently at great depths in the earth. Some aquifers are higher than the surrounding terrain, which can lead to springs or artesian wells that are in motion.

Hence, An aquifer is a geological formation that stores water. they are higher than the surrounding terrain, which can lead to springs or artesian wells that are in motion.

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In voltaic cells, electrons flow from the negative electrode (anode) to the positive electrode (cathode).

Electrons are moved from one species to another in redox reactions. When a reaction occurs spontaneously, energy is released that can be put to good use. The process must be divided into the oxidation reaction and the reduction reaction in order to capture this energy. A wire is used to move the electrons from one side of the reactions to the other after they have been placed into two separate containers. A voltaic/galvanic cell is produced as a result.

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Measuring tool would you use to measure the area of a football field is used a tender wheel

If you need to measure much longer lengths for example the length of a football pitch then you could use a trundle wheel then you use it by pushing the wheel along the ground and it clicks every time it measures one meter and to measure the football field area then

Area = length×breadth

Area = 90m×45m

Area = 4.05m²

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Will be the balanced chemical reaction.

A chemical reaction is a procedure that causes one group of chemical components to change chemically into another.  Chemical reactions, which can frequently be described by a chemical equation, traditionally include changes that only involve the positions of electrons in the formation and dissolution of chemical bonds between atoms, with no change to the nuclei (no change to the elements present). The study of chemical reactions involving unstable and radioactive elements, where both electronic and nuclear changes may take place, is known as nuclear chemistry.

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Molecules of gas in the air absorb light of shorter wavelengths in the range of 450-495nm is an example of quantitative data.

Quantitative data is defined as the data that can be counts in number or can be measured in numbers. There are two main types of quantitative data : discreate data and the continuous data. examples are age , date, distance , weight etc. so, the countable and measurable quantities in  numbers is quantitative data. Wavelength here is measured in numbers . so, wavelength is the quantitative data.

Thus, Molecules of gas in the air absorb light of shorter wavelengths in the range of 450-495nm is an example of quantitative data.

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ANSWER

option D

EXPLANATION

When a full bag of trash is placed in a compactor, the compactor will compress the bag so as to allow more trash to fill in. This is done by increasing the capacity of the trash.

Therefore, the volume of the trash bag will changed

Hence, the correct answer is option D

Configurational isomers are stereoisomers that can't be transformed into each other via rotating the molecule around a single bond. those configurational isomers may be found in kinds such as geometrical isomers and optical isomers.

Enantiomers are pairs of compounds with precisely equal connectivity however contrary to three-dimensional shapes. Enantiomers aren't the same as every different; one enantiomer can not be superimposed on the alternative. Enantiomers reflect images of every different.

Diastereomers are a kind of stereoisomer. Diastereomers are described as non-mirror pictures, non-same stereoisomers. hence, they arise whilst two or greater stereoisomers of a compound have specific configurations at one or greater of the equal stereocenters and aren't replicate pics of every different

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Minerals with an electric charge called electrolytes are found in your body. They can be found in various bodily fluids such as urine, tissues, and blood.

Why are electrolytes important?

Electrolytes are crucial because they aid in:

The many electrolytes include sodium, calcium, potassium, chloride, phosphate, and magnesium. They come from the foods we consume and the liquids we drink.

The body's electrolyte levels might get too high or too low when the body's water balance changes. The amount of water we consume and lose should be equal. If something throws off this equilibrium, we can be dehydrated or have too much water on our body (overhydration).

The water balance can be thrown off by a number of factors, including some medications, nausea, diarrhea, perspiration, and liver or kidney issues.

We can regulate the imbalance with the aid of treatment. Additionally, the cause of the imbalance must be determined and addressed.

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A rocket fuel, hydrazine, is produced by a reaction of cl2 with excess naoh and nh3. a.) 473 g of hydrazine can be produced from 1.00 kg of cl2

N2H 4 is created when 1 mole of ClNH 2 reacts.

ClNH 2 has a molar mass of 35.5+14+2=51.5 g/mol.

N2H 4 has a molar mass of 2(14)+4=32 g/mol.

As a result, 32 g of N2H 4 is created from 51.5 g of ClNH 2.

As a result, when 1000 g of ClNH2 reacts, 321000/51.5 = 621.36 g of N2H 4 is produced.

Only 473 g of N2H4 are produced, though.

As a result, the reaction's percentage yield is 473 100/ 621.36=76.12%.

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To calculate the molecules present in the given moles we will apply for Avogadro's number. Avogadro's number tells us that in one mole of any substance there are 6.022x10^23 molecules.

Therefore if we have 4 moles of NaCl we will have:

In 4 moles of NaCl there are 2 x10^24 molecules

Answer

Its final volume is 81.8 L

Explanation

Given;

Initial temperature, T₁ = 34.9°C = (34.9 + 273.15 K) = 308.05 K

Initial volume, V₁ = 70.0 L

Final temperature, T₂ = 86.8°C = ( 86.8 + 273.15 K) = 359.95 K

What to find:

The final volume at 86.8°C.

Step-by-step solution:

The final volume, V₂ can be calculated using Charle's law formula below:

Putting the values of the given parameters into the formula, we have

Hence, if the temperature of the gas increases to 86.8 degrees C, its final volume is 81.8 L

Answer:

81.8 L

Explanation:

Ideal gas law:

PV = nR T

V =   nR/P  * T       since nr and P are constant , this becomes

V = k T          where k is a proportionality constant ====> then:  V/T = k

so:

V1/T1 = V2/T2      ( NOTE : T must be in K)

V2 = T2 ( V1/T1) =  ( 86.8 + 273.15) ( 70.0) /(34.9 + 273.15) = 81.8 L

The rate law in general form for this reaction is:

rate = k[A]^m x [B]^n

and we want to determine m and n.

Notice the experiments conducted involved verifying the concentration of one of the reactants while keeping the other constant. By comparing two experiments in this way and noticing the effect on the reaction rate, one can deduce the order with respect to that reactant.

Take experiments 1 and 2 :

Doubling the concentration of OH⁻ while keeping (CH₃)₃CBr constant had  no effect on the initial rate.

This implies the order with respect to [OH⁻] is zero.

From experiments 1 and 3 we  see that doubling the [ (CH₃)₃CBr ] while keeping [OH-] the same doubles the initial rate.

We now have the orders of the two reactants, and the rate law will be:

rate = k [ (CH₃)₃CBr ] [ OH⁻]⁰  = k [ (CH₃)₃CBr ]

We could use another comparison to check our answer. For example comparing 3 and 4,  maintaining  [ (CH₃)₃CBr ]  constant and doubling  [ OH⁻] has no effect on the rate which confirms the order respect to  [ OH⁻]  is zero.

The rate constant we can determine it from any of the experiment by solving for k, for example from experiment 1:

7.14 x 10⁻³ M/s  = k x 0.626 M   ⇒ k = 0.011 s⁻¹

Therefore, the rate constant of the following reaction is 0.011 s⁻¹.

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To answer this, we use Boyle's Law:

States that, at constant temperature, the pressure P of a gas varies inversely with its volume V.

So, if the pressure increases, the volume will decrease.

Answer: The volume decreases.

The law of definite proportions agrees with Dalton atomic theory.

What is Dalton atomic theory?

It state that all matters is made of very tiny particles called atom. atoms are individual particles which can not be created or be destroyed in a chemical reactions. Atoms of given elements are identical in mass and chemical properties. Atoms of

different elements have different masses and chemical properties.

The law of definite proportions also known as proust's law ,state that a chemical compound contain the same proportion of elements by mass.this law is one of the stoichiometry .

Thus ,

This is the reason why it is agrees with dalton atomic theory.

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Answer: Yes the product will be different. If we use z - stilebene we would obtain trans dibromide.

Explanation:

Just as you had started with a molecule with two phenyl substituents on the same side, the product has the configuration on each stereocenter the same as the other (R,R; S,S).

If you rotate the central

C-C bond by about 120∘ you can compare these more closely.

Had you started with (E)-stilbene instead of (Z)-stilbene, you would have gotten meso (1S, 2R) and meso (1R, 2S) isomers instead.

The balanced equation for the complete oxidation reaction that occurs when methanol CH₃OH burns in air is 2CH₃OH + 3O₂ → 2H₂O + 4CO₂.

When Methane CH₃OH reacts with O₂, it get oxidized and CO₂ and H₂O are formed.

The chemical equation of the oxidation of methane when it burns in the air is,

CH₃OH + O₂ → H₂O + O₂

In order to balance the reaction, we should start first with carbon, then Hydrogen and at the end, we will balance oxygen atoms on both the sides of the reaction,

So, the balanced chemical equation becomes,

2CH₃OH + 3O₂ → 2H₂O + 4CO₂

So, in this reaction, Carbon is getting oxides as it is becoming carbon dioxide by the addition of oxygen into it and Oxygen itself is getting reduced.

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Gravity is a (n) force between objects and depends on an object's size and their distance apart.

Gravitational force is the attractive that exist between all object with mass an object with mass attracts another object with mass the magnitude of the force is directly proportional to the masses of the two objects and inversely proportional to the square of the distance between the two objects

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