Show that the following species have the same number of electron Na, Mg, O, and Ne​

The molecular formula of the compound is C₂Cl₂.

The empirical formula of a chemical compound is the smallest ratio of elements present in the compound. From the analysis

Calculate the number of moles of the compound using the ideal gas equation P × V = n × R × T

P × V = n × R × T

1.10 × 0.01 = n × 0.0821 × 291.0

0.011 = n × 23.8911

n = 0.011 ÷ 23.8911

n = 4.6 × 10⁻⁴ mol

Calculate the molecular mass using Stoichiometry n = m ÷ M

M = m ÷ n

M = 0.04373 ÷ (4.6 × 10⁻⁴)

M = 95.0 g/mol

The molecular mass for the compound equals the molecular mass from the empirical formula times n.

M = M ((CCl)ₙ)

95.0 = (12 + 35.5) × n

95.0 = 47.5 × n

n = 95.0 ÷ 47.5

n = 2.1

n ≈ 2

The molecular formula times 2 from the empirical formula C₂Cl₂

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Answer:

"Initiate"

1. To put into effect; bring into use.
• begin

• commence

• create

• launch

2. To take in as a member.

• admit

• pledge

• recruit

• welcome

A proton's density is equal to 3.962 E14 g/cm3, given that it has a mass of 1.0073 amu and a diameter of 1.73 1015 m.

Although protons were once thought to be elementary particles, the Standard Model of particle physics now recognises them as composite particles that comprise three valence quarks. Protons and neutrons are collectively referred to as hadrons.

Proton mass = 1.0073 amu, amu = 1.66054 E-24 g, and g proton = (1.0073 amu)(1.06654 E-24 g/amu = 1.074 E-24 g.

V = 4/3πr³\s∴ For example, r = D/2 ≈ 1.73 E-15 m)/2 = 8.65 E-16 m, where V = (4/3) (8.65 E-16 m) 3 = (1.074 E-24 g)/(2.711 E-39 cm3) = 3.962 E14 g/cm3

Protons include the H+ ion or the hydrogen atom's nucleus. Regardless of the isotope, each hydrogen atom has one proton, each helium atom has two, each lithium atom has three, and so on.

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18.72 moles of oxygen are needed to combust 3.12 moles of glucose.

Glucose is a type of sugar that can be represented by the chemical formula C6H12O6.

When glucose is burned in the human body, it combines with oxygen to form carbon dioxide (CO2) and water (H2O) as waste products.

The balanced equation for the combustion of glucose is:

C6H12O6 + 6O2 -> 6CO2 + 6H2O

From the equation, we can see that for every 1 mole of glucose, 6 moles of oxygen are needed.

To calculate the number of moles of oxygen needed to combust 3.12 moles of glucose, we can use this relationship;-

3.12 moles of glucose * 6 moles of O2/1 mole of glucose = 18.72 moles of O2

So, 18.72 moles of oxygen are needed to combust 3.12 moles of glucose.

The correct statement about the population shown in this graph is

The population is not continuing to grow because it has reached its carrying capacity.

Population typically refers to the number of people in a single area, whether it be a city or town, region, country, continent, or the world.

The carrying capacity of an environment is described as the maximum population size of a biological species that can be sustained by that specific environment, given the food, habitat, water, and other resources available.

The purpose of Carrying capacity is that it is a concept for biologists when trying to better understand biological populations and the factors that affect them.

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Density is an intensive property as it does not depend on the quantity of the substances Whereas mass and volume are extensive property. Therefore, the volume of solid is 9.8L.

Density tells about the compactness of the substances, how much dense is the substances in other words. Object that is more denser than water they just sink in the water.

Mathematically,

Density of solid = Mass of solid ÷volume marked on the graduated cylinder

mass of solid =24.5 g

density of solid =2.50 g/mL

substituting all the given values in the above equation, we get

2.50 g/mL= 24.5 g/ volume of solid

volume of solid= 9.8L

Therefore, the volume of solid is 9.8L.

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Answer:

2, 5 -dimethylheptane

Explanation:

Drawing the full structure would help you understand better

The heat that we are going to need so as to be able to vaporize the water is 40.4 kJ.

We know that the term thermal energy has to do with the energy that can be supplied to the water as heat when we raise the temperature of the water. In this case, we can see that we are dealing with  the thermal energy needed to completely vaporize 18.02 g of water at 100 degrees Celsius.

We know that the heat that is required can be obtained from the formula;

H = mL

m= mass of the water

L = latent heat of vaporization of water

H =  18.02 g * 2240 J/g

H = 40.4 kJ

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The number of mole in 68 grams of sulphur dioxide, SO₂ is 1.06 mole

The number of mole of a substance is defined by the following formula:

Mole = mass / molar mass

Using the above fromula, we can obtain the number of mole in 68 grams of sulphur dioxide, SO₂. This is shown below:

Mole = mass / molar mass

Number of mole of SO₂ = 68 / 64

Number of mole of SO₂ = 1.06 mole

Thus, we can conclude that the number of mole is 1.06 mole

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The compound is non polar covalent in  its structure as said above.

Let us recall that the melting point has to do with the temperature at which there is the conversion of the solid to a liquid. We know that the melting point of the compound would depend on the structure of the compound.

If the compound would have a melting point that is about  20°C, the implication is that the compound is not be held by very strong intermolecular forces hence it must be covalent.

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Answer:

A. The air particles pushing on the tire as they expand

Explanation:

Answer: A is the right answer

Explanation:

The air pressure inside a bicycle tire is caused by the weight of the air molecules pressing down on the surface of the tire. This is why you can sometimes hear a hissing sound when you first get a flat tire – it’s because the air is escaping from the tire and equalizing the pressure inside and outside of the tire.

To name ions from radicals, first identify the charge of the ion by counting the number of protons and electrons.

What do you mean ions?

Ions are atoms or molecules that have gained or lost one or more electrons and thus have a net electric charge. They are formed when an atom gains or loses electrons in a chemical reaction. Examples of common ions include sodium (Na+), chloride (Cl-), calcium (Ca2+), and magnesium (Mg2+).

Then determine the name of the ion based on its charge. For example, if the ion has a positive charge, it is called a cation; if it has a negative charge, it is called an anion. Finally, name the ion using the element's name and its charge. For example, a radical with two protons and one electron would be a cation and would be named “Hydrogen ion”.

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Byron's goal had always been to compete in the Olympics as a runner. He had told all his family and friends, and he was dedicated to his dream: Byron's goal was to run in the Olympics.

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The total number of moles of electrons lost by Mg(s) when 2.0 moles of electrons are gained by Ni2+(ag) is also 2.0 moles of electrons.

This is because in a chemical equation, the number of moles of electrons gained by the reducing agent (in this case Ni2+) is equal to the number of moles of electrons lost by the oxidizing agent (in this case Mg(s)).

In this redox reaction, Mg is being oxidized because it loses electrons and Ni is being reduced because it gains electrons. The oxidation and reduction process are occurring simultaneously, so the number of electrons lost by Mg(s) is equal to the number of electrons gained by Ni2+(ag).

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The electrons that are gained by the [tex]Ni^{2+}[/tex] ion is 2.0 moles of electrons.

We know that when there is a redox reaction, there would be the loss or gain of electrons in the process. The process is a simultaneous one so the electrons that are lost by one specie must as a matter of necessity be gained by another specie.

In this case, as we look at the reaction equation we can see that there are two electrons that have been lost by the magnesium atom and these two electrons would be gained by the Nickel II ion.

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Answer:

similar as they both have valency of 1

different as sodium is metal while chlorine is non metal

As per the balanced reaction, 3 moles or 6 g of hydrogen gas produces 2 moles or 34 g of ammonia. Then, 6.5 g of hydrogen produces 36.8 g of ammonia.

Ammonia is a covalent compound formed from the nitrogen atom and three hydrogen atoms. The process of manufacturing of ammonia is called Haber process.

As per the balanced reaction, 3 moles or 6 g of hydrogen gas produces 2 moles or 34 g of ammonia. Then, 6.5 g of hydrogen produces 36.8 g of ammonia.

The mass of ammonia produced from 6.5 g of hydrogen is calculated as follows:

mass of ammonia   = (6.5 × 34 g) / 6 g = 36.8 g

Therefore, the mass of ammonia produced from 6.5 g of hydrogen gas is 36.8 g.

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According to the question, 0.55 lb many pounds of gold were in the sample of heat to melt it from room temperature.

What is heat?
Heat is the transfer of energy from one object to another due to the temperature difference between them. Heat is the form of energy that is transferred between two objects with different temperatures. Heat moves from the object with the higher temperature to the object with the lower temperature. Heat is also created when an object does work, such as friction or compression. Heat transfer can happen through conduction, convection, and radiation. Conduction occurs when two objects of different temperatures are in direct contact with each other.  

The specific heat of gold is 0.128 J/g°C.

3.25 x 104 J = (3.25 x 104 J) / (0.128 J/g°C x 841.2°C)

= 2.5 x 103 g

2.5 x 103 g = (2.5 x 103 g) / (453.6 g/lb)

= 0.55 lb of gold

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Answer:

Cellular Respiration: C6H12O6 + 6O2 → 6CO2 + 6H2O. 
Photosynthesis: 6CO2 + 6H2O → C6H12O6+ 6O.

Explanation:

:)

Answer: 64.7 [tex]*10^2[/tex]

Explanation:

Significant figures are the number of digits in a value that correlate with the accuracy of that value.

First lets solve the equation:

(1.7x10^6)/(2.63x10^2) + 7.33 = ?

(1,700,000)/(263) + 7.33

(6,463.8783) + 7.33 = 6,471.2083

We have to simplify the answer to the correct amount of significant digits.

6,471.2083 -> 64.7 [tex]*10^2[/tex]

When burning magnesium is lowered in a gas jar full of carbon dioxide, the burning process continues because the carbon dioxide acts as an oxidizing agent.

A combustion reaction is a type of chemical reaction that occurs when a fuel, such as a hydrocarbon, reacts with an oxidizing agent, such as oxygen, to produce heat and light in the form of a flame. The basic equation for a combustion reaction is:

Fuel + Oxidant → Heat + Light + Products

In the case of burning magnesium, the fuel is magnesium and the oxidant is carbon dioxide. The products of the reaction are magnesium oxide and carbon dioxide. Combustion reactions are exothermic, meaning they release energy in the form of heat.

This means that the carbon dioxide provides the oxygen necessary for the combustion reaction to continue, allowing the magnesium to continue burning. Additionally, the carbon dioxide also helps to extinguish the flame by removing the heat and the oxygen from the combustion zone.

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We should be using natural materials because they are safer for our environment.

Claims: We should be using natural materials as opposed to synthetic materials. This is because natural materials are organic and 100% biodegradable. Synthetic materials, on the other hand, are not all naturally biodegradable. Many of them persist in the environment and hurt the environment and living organisms in the process.

Evidence: Most nylons and plastics are good examples of synthetic materials. Both are not biodegradable and persist in the environment. Our oceans are filled with nondegradable plastics. This plastic pollution is a threat to water transportation, aquatic biodiversity and food sustainability of humans.

Reasoning: Most synthetic materials affect the environment and we humans as compared to natural materials who are easily removed from the environment. Thus, our preference should be natural materials.

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Answer:

Explanation:

a

Answer: 32g of oxygen and 4g of hydrogen were reacted in total.

Explanation:

To find out how many grams of reactants were reacted, we need to use the balanced equation of the reaction. The equation for the reaction between hydrogen and oxygen to produce hydrogen peroxide is:

2H2 + O2 --> 2H2O2

From the equation, we know that the reaction involves 2 moles of hydrogen and 1 mole of oxygen. We can use the balanced equation to determine the stoichiometry of the reaction, which tells us the relative number of moles of each reactant and product.

We know that 32g of oxygen was reacted, and since 1 mole of oxygen is equal to 16g, we can calculate the number of moles of oxygen by:

32g / 16g = 2 moles

We know that 2 moles of hydrogen are required for every mole of oxygen. so the number of moles of hydrogen is also 2 moles.

We know that 1 mole of hydrogen is equal to 2g, so we can calculate the number of grams of hydrogen by:

2 moles x 2g = 4g

Therefore, 32g of oxygen and 4g of hydrogen were reacted in total.

Answer: 509.8 g

Explanation:

5 moles Al₂O₃

Al: 2 x 26.98 g = 53.96 g

O: 3 x 16.00 g = 48.00 g

Total grams = 101.96 g

1 mole of Al₂O₃ = 101.96 g

5 mol Al₂O₃ x (101.96 g Al₂O₃/1 mol Al₂O₃) = 509.8 g Al₂O₃

Note that moles of Al₂O₃ cancel and you are left with grams, which is what you want.

Iron hydroxide is the compound that gives off some gold sparks in a flame test and the chemical formula of the compound is Fe(OH)₃.

Compound is defined as a chemical substance made up of identical molecules containing atoms from more than one type of chemical element.

Molecule consisting atoms of only one element is not called compound.It is transformed into new substances during chemical reactions. There are four major types of compounds depending on chemical bonding present in them.They are:

1)Molecular compounds where in atoms are joined by covalent bonds.

2) ionic compounds where atoms are joined by ionic bond.

3)Inter-metallic compounds where atoms are held by metallic bonds

4) co-ordination complexes where atoms are held by co-ordinate bonds.

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If 8.2 moles of Mg are burned, the number of moles of O₂ consumed is 4.1 moles.

Stoichiometry refers to the quantitative relationship between the reactants and products of a specific reaction or equation.

According to this question, magnesium reacts with oxygen to produce magnesium oxide as follows:

2Mg + O₂ → 2MgO

Based on the above equation, 2 moles of magnesium reacts with 1 mole of oxygen gas

This means that 8.2 moles of magnesium will react with 8.2 × ½ = 4.1 moles of oxygen gas.

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The boiling point of benzene when the external pressure is 440 torr is 80.1 °C (176.2 °F).

What is benzene?

Benzene is an organic compound composed of six carbon atoms in a ring structure, with one hydrogen atom attached to each carbon atom. It is a highly flammable, colorless liquid with a sweet smell. Benzene is a natural component of crude oil and is one of the most important organic chemicals used in industry. It is used in the production of plastics, resins, synthetic fibers, rubber, pesticides, detergents, drugs, and dyes. It is also used as a solvent for fats, oils, waxes, resins, and inks. Benzene is classified as a carcinogen and its exposure can cause a variety of adverse health effects, including acute myelogenous leukemia, lymphomas, and other forms of cancer.

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Answer: False

Explanation:

There are no scientific proofs that an increase in co2 levels leads to an increase in the length of days, but there may be an explanation for how the appearance of the day matters to an individual as an increase in co2 concentration leads to an increase in the temperature of the earth (greenhouse effect) also its increases the temperature at the sunset and hence leads to a misunderstanding that the effect of sn is still there hence increasing the length of the day but this is clearly wrong and is reported by very few individuals, there is no direct relation of increase in co2 content and increase in day's length

The thermochemical equation of the reaction is CO (g) + 3H₂ (g) ⇒ CH₄ + H₂O. 48 KJ heat will be released during this reaction if 67.2 liters of methane.

A balanced stoichiometric chemical equation that includes the enthalpy change i.e, ΔH is called as thermochemical equation.

At STP,

1 mole of any gas occupies a volume of 22.4 L.

The volume of 67.2 L corresponds to  67.2 / 22.

= 3  moles.

1 mole of CO₂ obtained from 1 mole of methane.

3 moles of CH₄ will be obtained from 3 moles of CO₂.

The molar mass of methane = 16 g/mol.

Then, the mass of 3 moles of methane = 3 × 16

= 48 KJ

Thus,The thermochemical equation of the reaction is CO (g) + 3H₂ (g) ⇒ CH₄ + H₂O. 48 KJ heat will be released during this reaction if 67.2 liters of methane.

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Below is a list of the temperature change solution.

The source of the temperature change is

Initial Temperature - Final Temperature

Temperature measurements

It is a gauge for determining how hot or chilly a body is.

To quantify temperature variations,

The water and iron's beginning and final temperatures are noted.

To Iron

Iron that has been heated up is submerged in water.

Water is at a lower temperature, so both of the temperatures will change.

These information is saved.

Final temperature minus initial temperature equals temperature change.

a) The difference in temperature for metal is 200 - 100 = 100 0C

Water temperature change = 22.5

Change in temperature for both = 23.3

b) 0.7 for water

Metal 76.6 for iron

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Complete Question -

Put the Metal in the Water and Measure

Temperature Changes (Lead)

Measure the initial temperature of the water to the

nearest 0.1°C. Record in the data table.

Initial temperature of metal =

Initial temperature of water

Final temperature of both = [

27

DONE

26

25

24

23

Intro

Continue

AL

250 ml

=பா-©

200

150

100

1

27

O

°C

°C