(b) The chemical equation for the reaction between lithium and oxygen is 4Li + 0,2L1,0 Write a chemical equation for the reaction between lithium and nitrogen ​

Therefore, the answer is (e) 0.20 mol (rounded to two significant figures).

The balanced chemical equation for the given reaction is:4Fe + 3O2 → 2Fe2O3Given, moles of Fe = 0.45 mol

Moles of O2 = 0.30 mol

According to the balanced chemical equation, 4 moles of Fe react with 3 moles of O2 to form 2 moles of Fe2O3.

So, the mole ratio of Fe to Fe2O3 is 4:2 or 2:1.

To calculate the moles of Fe2O3 produced, we need to convert the given moles of Fe to moles of Fe2O3 using the mole ratio.

Moles of Fe2O3 produced = (0.45 mol Fe) / (2 mol Fe2O3 / 4 mol Fe)

Moles of Fe2O3 produced = 0.45 mol Fe × (2 mol Fe2O3 / 4 mol Fe)

Moles of Fe2O3 produced = 0.225 mol Fe2O3

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Answer:

C10H22

Explanation:

C6H6 is the molecular formula for Benzene. Benzene is an aromatic hydrocarbon which is obtained from the destructive distillation of coal. Benzene is a colourless volatile liquid with a sweet smell. Its vapor is highly toxic and mildly carcinogenic. It is highly inflammable. Benzene is nonpolar which is insoluble in water. Since benzene is insoluble in water , it will take an insoluble compound to be soluble in benzene since "like dissolves like".

From the options given:

C10H22 which is the molecular formula for Decane would be the most soluble in C6H6. This is because Decane is an alkanes which is an aliphatic hydrocarbon and their physical properties increases with increasing molar mass ( i.e melting points, boiling points , density, polarity) etc. The first mfour member of the family are gases. non-polar liquid starts with th fifth member of the family which is pentane and from hexadecane onwards the members are solids at room temperature. Thus, decane is a non-polar hydrocarbon which is insoluble in water but soluble in benzene

Answer: When in a magnetic field, the two electrons in a particular orbital differ very slightly in energy because of a property called electron spin. The theory of electron spin states that the two electrons in a single orbital spin in opposite directions on their axes, causing an energy difference between them

Explanation: I hope this helps!

Answer:

Rate = k [ClCO][Cl2]

Explanation:

Cl2⇌2Cl(fast,equilibrium)

Cl+CO⇌ClCO(fast,equilibrium)

ClCO+Cl2→Cl2CO+Cl(slow)

The rate determining step from which the rate aw is obtained from is the slowest step of a chemical reaction. In this reaction, the slowest step is;

ClCO+Cl2 → Cl2CO+Cl (slow)

The rate equation for the step is;

Rate = k [ClCO][Cl2]

ClCO is an intermediate and would eventually get cancelled out from the overall rate equation.

Phosgene is the chemical used in the formation of pesticides and ios poisonous. The rate law is given as, k [chloroformylradical][chlorine gas].

The rate law is the relation of the concentration of the reactants and the products with that the speed of the reaction.

The reaction for the formation of phosgene is given as,

\(\rm Cl_{2} \rightleftharpoons 2Cl\; (fast,equilibrium)\\\\\rm Cl+CO \rightleftharpoons ClCO\; (fast,equilibrium)\\\\\\rm ClCO+Cl_{2}\rightarrow Cl_{2} CO+Cl\; (slow)\)

The rate law is determined by the rate-determining step which is the slowest step of the reaction.

\(\rm ClCO+Cl_{2}\rightarrow Cl_{2} CO+Cl\; (slow)\)

The rate of the equation is given as,

\(\rm Rate = k [ClCO][Cl_{2}]\)

As COCl is an intermediate the third step will be the rate-determining step.

Therefore, the slow step determines the rate of the reaction.

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Answer:

\(H_2CO_3\rightleftharpoons H_2O + CO_2\)

Explanation:

When carbon dioxide dissolves and reacts with water, the water and the gaseous  \($CO_2$\)   reacts to form a dilute mixture solution of \($H_2CO_3$\) (carbonic acid ).

The reaction is   \(H_2O + CO_2\rightleftharpoons H_2CO_3\)

This is a forward reaction.  And the symbol   \($ \rightleftharpoons $\)  shows that the reaction can be reversible. It means that the reaction can be carried in forward direction as well as in the backward direction.

The reaction attains chemical equilibrium until the reactants and the products no longer changes with time.  

The carbonic acid can also dissociates into carbon dioxide and water in the backward direction.

\(H_2CO_3\rightleftharpoons H_2O + CO_2\)

Answer:

The enthalpy is increased by the increased heat of the reaction.

Explanation:

In this reaction, as the transition from solid to liquid state, enthalpy increases, that is, the heat applied to change its state is greater and this increases, reaching a mayor disorder.

If the reaction increases its heat, and a liquid state passes, the enthalpy increases, therefore the disorder also and the entropy will also be increased.

Answer:

The north atlantic contains the warmest and saltiest water of the major oceans, the southern ocean is the coldest, the north pacific has the lowest average salinity. This density signature is locked into the water parcel when it sinks

Explanation:

i think

Answer:

HCl=18.7g.

Explanation: First, we ensure that the equation is balanced. Then, we convert the given grams to moles of reactant.

Answer:

salt and oil

water and salt

water and sugar

Explanation:

A sound wave would begin with a vibration.

A sound wave begins when there is a disturbance or vibration in a medium, such as air, that sets the particles of the medium into motion. This motion creates a disturbance that travels through the medium as a wave. The vibration could be caused by a variety of sources, such as a speaker, a musical instrument, or a clap of the hands.

The speed at which a sound wave travels through a medium depends on the density and elasticity of the medium, as well as the temperature. In air, sound waves typically travel at a speed of approximately 340 m/s.

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Answer:

The answer to part c is the amount of moles of FeBr₃ that will be formed is approximately 0.179 moles

Explanation:

The given chemical reaction is 2Fe + Br₂ → 2FeBr₃

The mass of iron, Fe, in the reaction = 10 g

a) The amount of moles of iron that reacted = The mass of iron in the reaction/(The molar mass of iron)

The atomic mass of iron = 56 amu

Therefore, one mole of iron = 56 grams

The amount of moles of iron that reacted = 10/(56) ≈ 0.179

The amount of moles of iron that reacted ≈ 0.179 moles

b) The amount of moles of bromine that reacted = 3/2 × The amount of moles of iron that reacted

∴ The amount of moles of bromine that reacted = 3/2 × 0.179 ≈ 0.2685

The amount of moles of bromine that reacted ≈ 0.2685 moles

c) The amount of moles of FeBr₃ that will be formed = The amount of moles of iron in the reaction ≈ 0.179 moles

d) The mass of one molecule of FeBr₃ = Mass of 1 atom of iron, Fe + 3 × The mass of 1 atom of bromine, Br

∴ The mass of one mole of FeBr₃ =  56 + 3 × 80 = 296

The mass of one mole of FeBr₃ = The molar mass of FeBr₃ =  296 grams

The mass of FeBr₃ formed = The molar mass of FeBr₃ × The number of moles of FeBr₃ formed

∴ The mass of FeBr₃ formed = 296 × 0.179 ≈ 52.984

The mass of FeBr₃ formed  ≈ 52.984 grams

Answer:

See explanation

Explanation:

We all know that noble gases are quite stable. The stability of noble gases is the reason why they do not participate in chemical bonding. This stability stems from their possession of a stable duplet or octet structure.

Atoms of other elements attain this stable duplet or octet structure by chemical combination (chemical bonding).

There are two main ways that elements can bod with each other;

If you see the nuclide notation of uranium (u).

The letter in the mid is the symbol of the element.

The number in the bottom left corner is atomic number (Tells you the number of protons)

The number on the upper left corner is the mass number (equal to the mass number ; = the neutrons and protons added together)

At the last, the charge is on the upper right corner, if there is no +ve and -ve symbol then the charge is neutral.

To find the number of neutrons, protons and electron :

1. No. of protons = Atomic Number (Z)

2. No. of neutrons = Mass number (A) - Atomic number(Z)

3. No. of electrons = Atomic number - Charge

To find the charge it is find by the periodic table suppose group 1 alkali metals have +1 charge and in the same way group 16 -2 charge .

Uranium is a radioactive element and hence it is an alpha particle and hence it has a positive charge.

There are many radioactive element who are alpha particles like thorium and plutonium. Beta particles have negative charge.

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Answer:An exact number has absolutely no uncertainty in it. Exact numbers cannot be simplified and have an infinite number of significant figures. Measured numbers have a limited number of significant figures.

Explanation:

Answer:

B) an area in a waterway where no plants or animals live.

Explanation:

A dead zone is an area in a waterway, typically near the mouth of a river or other inlet, where oxygen levels are extremely low or depleted, making it difficult or impossible for most marine life to survive. The lack of oxygen is often caused by excessive nutrient pollution from human activities such as agriculture and sewage treatment, which can lead to harmful algal blooms and subsequent oxygen depletion. The result is a "dead zone" where most fish and other marine life cannot survive.

Hot, molten rock crystallizes and hardens to form igneous rocks, which are named after the Latin word for fire.

Near active plate borders or hot places, the melt begins its journey deep within the Earth before rising to the surface.

Depending on where the molten rock hardens, igneous rocks are classified as either intrusive or extrusive.

Intrusive Igneous Rocks: When magma is imprisoned deep inside the Earth, intrusive, or plutonic, igneous rocks are created. Massive globules of molten rock are rising to the surface.

Thus, Hot, molten rock crystallizes and hardens to form igneous rocks, which are named after the Latin word for fire.

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Answer:

23

Explanation:

1. X is ethanol - CH3CH2OH. Y is Sodium ethoxide  - CH3CH2ONa. Chemical equation for the reaction is: 2CH3CH2OH+2Na→2CH3CH2ONa+H2. When Ethanol is heated with excess of conc. sulphuric acid, it leads to dehydration of ethanol to ethene - CH2=CH2. CH3CH2OHconc.H2SO4CH2=CH2+H2O

Fuel gas is any of a variety of fuels that are gaseous under normal circumstances. The majority of fuel gases are made up of hydrocarbons, hydrogen, carbon monoxide, or a combination of these. These gases are energy sources that can be easily carried and disseminated via pipelines. A combustible gas is one that may burn in either air or oxygen. Combustible gases include hydrogen, methane, propane, and isobutane. In the presence of an ignition source, a mixture of flammable gas and oxygen will explode. Combustible gas is a common cause of gas explosions.

Here,

If a small piece of sodium is dropped into ethanol, it reacts steadily to give off bubbles of hydrogen gas and leaves a colorless solution of sodium ethoxide CH3CH2ONa. Hydrogen gas that is released burns with a pop sound.

1. X is ethanol - CH3CH2OH

2. Y is Sodium ethoxide  - CH3CH2ONa

3. Chemical equation for the reaction is:

     2CH3CH2OH+2Na→2CH3CH2ONa+H2

4. When Ethanol is heated with excess of conc. sulphuric acid, it leads to dehydration of ethanol to ethene - CH2=CH2.

    CH3CH2OHconc.H2SO4CH2=CH2+H2O

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To determine the equation of the parabola that passes through the given points, we can use the standard form of a quadratic equation, which is y = ax² + bx + c.

Substituting the coordinates of the three points into this equation will give us a system of three equations in three variables, which can be solved to find the values of a, b, and c that make up the equation of the parabola. The process is as follows:Substituting (-12, 1333) into the equation, we get: 1333 = a(-12)² + b(-12) + cSimplifying, we get: 1333 = 144a - 12b + c(1)Substituting (4,77) into the equation, we get: 77 = a(4)² + b(4) + cSimplifying, we get: 77 = 16a + 4b + c(2)Substituting (8,403) into the equation, we get: 403 = a(8)² + b(8) + cSimplifying, we get: 403 = 64a + 8b + c(3)Solving equations (1), (2), and (3) simultaneously, we get: a = -3, b = 45, and c = 1427Substituting these values back into the standard form equation, we get: y = -3x² + 45x + 1427Therefore, the equation of the parabola that passes through the points (-12, 1333), (4,77), and (8,403) is y = -3x² + 45x + 1427.

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Answer:

A precipitate is formed as a result of a double displacement reaction. Explanation: When two substances (can be aqueous or liquids) in solution ...

We used the formula percentage of iron magnetite=(Mass of Fe/Mass of Fe3O4)100%. We then calculated the percentages of iron magnetite (68%) and oxygen magnetite (32%).

Magnetite is a mineral and one of the most important iron ores, with the chemical formula Fe2+Fe3+2O4. It is a ferrimagnetic iron oxide that is attracted to a magnet and can be magnetized to become a permanent magnet. With the exception of extremely rare native iron deposits, it is the most magnetic of all naturally occurring minerals on Earth. Naturally magnetized pieces of magnetite, known as lodestone, will attract small pieces of iron, which is how ancient peoples discovered magnetism.

Magnetite is black or brownish-black with a metallic luster, has a Mohs hardness of 5-6, and leaves a black streak. Magnetite grains are very common in igneous and metamorphic rocks.

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ANSWER

EXPLANATION

Given that

The mass of the gas is 10.0g

The volume of the gas is 7.69L

The pressure of the gas is 1.00 atm

The temperature of the gas is 27 degrees Celcius

Follow the steps below to find the molar mass of the gas

Step1; Assume the gas is an ideal gas

Step 2; Find the number of mole of the gas using the equation above

Step 3; find the molar mass of the sample

Answer:

Gibbs equation helps us to predict the spontaneity of reaction on the basis of enthalpy and entropy values directly. When the reaction is exothermic, enthalpy of the system is negative making Gibbs free energy negative. Hence, we can say that all exothermic reactions are spontaneous.

Answer:  Molecular Formula is C5H5

Explanation:   M(CH) = 13.018 g/mol

 Empirical formula of compound is (CH)x in which x = 2,3,4,...

   Molar mass of the substance is 65 g.   x = 65 g/mol : 13 g/mol = 5

Answer:

balanced plz give correct question

Answer:

1. Solid

2. atom

3. faster and farther apart

4.more freely moving than a solid

5.The amount of matte in an object

Explanation:

Answer:

1. Solid

2. Atom

3. Faster and farther apart

4. More freely moving than a solid

5. The amount of matter in an object.

The hybridization of the carbon atom that is double bonded to an oxygen atom is: A. sp.

To determine the hybridization of an atom in a molecule, we can follow these steps:

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Answer:

D) C5H12

Explanation:

The rate of evaporation of a solution depends on the nature of intermolecular forces in the solution. The stronger the magnitude of intermolecular forces present the lower the rate of evaporation.

If we consider the compounds; C7H15OH, C7H15NH2 and C6H13COOH, the presence of polar groups implies that dipole-dipole interactions are present in the molecule leading to stronger intermolecular interaction and a slower rate of evaporation.

On the other hand; C7H16 and C5H12 are alkanes. The intermolecular forces that exists between their molecules is the weak dispersion forces. However, the magnitude of dispersion forces increases as the molecular mass of the compound increases.

Hence, C5H12 has the fastest rate of evaporation since it has the lowest molecular mass.

Answer:

8

Explanation:

there are two ammonium ions with four hydrogen atoms each.

4*2=8

Ammonium carbonate has the chemical formula NH42CO3. 8 hydrogen atoms (H) are in ammonium carbonate.

A salt with the chemical formula (NH4)2CO3 is ammonium carbonate. It is used as a leavening agent and as a smelling salt because it easily breaks down into gaseous ammonia and carbon dioxide when heated.

Ammonium Carbonate is a crystalline (sand-like), colourless or white powder with a powerful ammonia odour. It is utilised in smelling salts, medicinal, reagents, tanning, mordant dyeing, and baking powders.

Food grade ammonium carbonate, sometimes referred to as baker's ammonia or Hartshorn salt, is a leavening agent that is frequently used in traditional recipes. Upon heating, it has the ability to quickly remove gaseous ammonia and carbon dioxide.

There are two ammonium ions with four hydrogen atoms each.

4 * 2 = 8

Thus, 8 hydrogen atoms (H) are in ammonium carbonate.

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