need help on this and explain

Answer:

(a) The molar mass of N2 is 28 g/mol, and the molar mass of H2 is 2 g/mol.

n(N2) = 25.0 g / 28 g/mol = 0.893 mol

n(H2) = 18.75 g / 2 g/mol = 9.375 mol

calculate the maximum amount of product that can be formed from each reactant:

From N2: n(NH3) = 0.893 mol N2 x (2 mol NH3 / 1 mol N2) = 1.786 mol NH3

From H2: n(NH3) = 9.375 mol H2 x (2 mol NH3 / 3 mol H2) = 6.25 mol NH3

Therefore, the limiting reactant is N2

(B) For N2: 0.893 mol - 0.893 mol = 0 mol

For H2: 9.375 mol - (0.893 mol x 3 mol H2 / 1 mol N2) = 6.696 mol

Therefore, 6.696 mol of H2 will be left over. To convert this to a mass, we can use the molar mass of H2:

m(H2) = 6.696 mol x 2 g/mol = 13.392 g H2

Answer:

Balanced equation: N2 + 3 H2 ➞ 2NH3.

a) The limiting reactant is H2

b) The excess reactant is N2

Explanation:

hydrogen will be the limiting reagent as 3 moles are hydrogen are used up for every one mole of nitrogen to form ammonia

Sedimentary rocks and volcanic lava are the fossils that will be older, found in the top layers o in the bottom layer.

The lithified counterparts of sediments are sedimentary rocks. They are primarily created by hardening unconsolidated sediments that already exist via cementing, compacting, as well as other means. Nevertheless, certain types of sedimentary rock do not display an intermediate life as sediment and instead precipitate immediately towards their solid sedimentary form.

Layers or beds are formed by the deposition of volcanic lava flows and sedimentary rocks comprised of mud, sand, gravel, or fossilized shells. The layers just at bottom of the pile typically older than that of the ones at the top because they accumulate over time.

Therefore, sedimentary rocks and volcanic lava are the fossils that will be older, found in the top layers o in the bottom layer.

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The first four periods compared to the group containing nitrogen Group 15 elements have half-filled p orbitals.

A basic part of a whole. In chemistry, refers to a simple substance that cannot be broken down into smaller parts or changed into another substance. The basic part of an element is an atom, which contains protons, neutrons, and electrons. All atoms of an element have the same number of protons.

The elements are classified as metal, non-metal, and metalloid. The extreme left side elements in the periodic table are metals, for example, sodium, calcium, caesium, etc. However, elements on the right side are generally referred to as non-metals, carbon, chlorine, oxygen, etc.

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Thin sheets of gold foil were bombarded with positively charged alpha particles. Most alpha particles passed right through the foil. However, a handful of them were dispersed in various directions.

The fundamental component of chemistry is the atom. It is the smallest piece of matter that can be separated without releasing electrically charged particles. It is also the smallest piece of stuff with the characteristics of a chemical element.

We've made the decision to retire Atom in addition to further our dedication to bringing quick and dependable software development to the internet via Microsoft Visual Studio Code & GitHub Codespaces, even though the goal of expanding the software maker community still exists.

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The formula of lithium hydroxide is LiOH.

The molar mass of LiOH = 24 g/mol

The mass of 1 mole of a chemical is indicated by its molar mass.

It provides you with the amount of grams per mole of a substance, to put it another way. Hence, grams/mole are the units for molar mass.

The mass of a specific chemical element or chemical compound (g) divided by the amount of substance is known as the molar mass (mol). By multiplying the standard atomic masses (in g/mol) of the constituent atoms, one can determine the molar mass of a compound.

The molar mass of lithium hydroxide, LiOH is derived as folows:

Molar mass = 7 + 16 + 1

Molar mass of LiOH = 24 g/mol

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The chemical bonds are generally of two types, they are ionic and covalent bonds. Here the number of bonds in the given compound is 4.

A chemical bond can be defined as the attractive force which holds the constituent atoms or ions of a molecular species together. Bonds arise from the electrostatic forces between the positively charged atomic nuclei and the negatively charged electrons.

The ionic bond is formed by the complete transfer of one or more electrons from one atom to another whereas the covalent bond is formed by the sharing of an electron pair between the atoms.

Here CCl₄ is a covalent compound which contains four non-polar covalent bonds between carbon and chlorine atoms. Here by sharing the electrons, 'C' attains the electronic configuration of 'Ne' and 'Cl' attains the configuration of 'Ar'.

Thus there are 4 bonds in CCl₄.

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The balanced chemical equation for the decomposition of dinitrogen pentoxide(N₂O₅) into nitrogen gas (N₂) and oxygen gas (O₂) is: 2 N₂O₅ → 2 N₂ + 5O₂.

In chemistry, a reaction refers to a process in which one or more substances, called reactants, are transformed into one or more different substances, called products. Reactions can be caused by a variety of factors, such as heat, light, or the presence of a catalyst, and they can occur in a wide range of physical states, including gases, liquids, and solids. There are many different types of chemical reactions, which can be classified based on their mechanisms, the nature of the reactants, and the properties of the products. For example, a reaction can be classified as a redox reaction if there is a transfer of electrons between the reactants, or as an acid-base reaction if there is a transfer of protons between the reactants.

Here,

This equation is balanced because it has the same number of atoms of each element on both the reactant and product side. On the left side, there are 2 nitrogen atoms, 10 oxygen atoms, and 2 molecules of N₂O₅. On the right side, there are 2 nitrogen atoms, 10 oxygen atoms, and 1 molecule of O₂ and 1 molecule of N₂.

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It is accurate what is said about membranes below: an enzyme-mediated mechanism is mostly responsible for lateral diffusion.

A substance can be either hydrophobic or hydrophilic. Given that the word "hydr" is derived from the Greek word "hydor," which means "water," hydrophobic materials are "water-fearing" and do not blend with water, whereas hydrodynamic materials are "water-loving" and have a propensity to become wetted by water.

Non-polar substances with a low affinity for water are referred to as hydrophobic substances and are water-repellent. As opposed to a hydrophobic interaction, which is indicated by a contact angle larger than 90°, a hydrophilic interaction is indicated by a contact angle less than 90°.

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Answer:

≈16.67 grams

Explanation:

To solve this problem, we need to use the atomic mass of titanium to convert the number of atoms to grams. The atomic mass of titanium is 47.867 g/mol, which means that one mole of titanium atoms has a mass of 47.867 grams.

We are given the number of atoms of titanium, which is 2.1 x 10^23. We can use Avogadro's number to convert this to the number of moles of titanium:

2.1 x 10^23 atoms / (6.022 x 10^23 atoms/mol) = 0.349 moles

Now we can use the molar mass of titanium to convert moles to grams:

0.349 moles x 47.867 g/mol = 16.67 grams

Therefore, 2.1 x 10^23 atoms of titanium have a mass of approximately 16.67 grams.

A water solvent-based solution with a pH change of 3.24 is made up of a combination of a weak acid and the conjugate base of the weak acid

A simple buffer is a solution that combines a strong acid with a weak base in relatively high concentrations. These buffers are alkaline because their pH is higher than 7 at 298 K. Consider NH4OH and NH4Cl.

Buffer solutions maintain a constant pH by neutralizing extra acids or bases. These compounds consist of a weak acid and its conjugate base, which exchange protons and hydroxide ions to produce water.

pH = -log(7.1×10−4×0.380.47)7.1×10-4×0.380.47 = 3.24

[H3O+] = 7.1 x 10-4 x 0.380.47

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The compound will likely have a high boiling point and be a solid at STP. Ionic compounds are compounds composed of strong electrostatic bonds between a cation (positive ion) and an anion (negative ion).

These strong electrostatic bonds require a large amount of energy to break, resulting in a high boiling point. This high boiling point is due to the strong bond between the cation and anion, and the need to break these bonds in order for the compound to go from the solid to the liquid phase. Additionally, due to the strong electrostatic bonds, the compound is likely to be a solid at STP. These strong forces require high amounts of energy to break the bond, resulting in a high boiling point.  At STP, the electrostatic forces will be strong enough to keep the ions in a solid state.

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For binary ionic compounds (ionic compounds that include only two kinds of elements), the compounds are named via writing the title of the cation first observed with the aid of the name of the anion. For example, KCl, an ionic compound that incorporates K⁺ and Cl⁻ ions, is named potassium chloride.

Answer and Explanation: Option A is the right reply as ionic compounds are made of positively-charged cations and negatively-charged anions. The ensuing electrostatic appeal between the oppositely charged ions is what creates the ionic bond.

Binary Ionic Compounds Containing a Metal and a Nonmetal. A binary compound is a compound formed from two one-of-a-kind elements. ...

Ionic Compounds Containing a Metal and a Polyatomic Ion. Metals combine with polyatomic ions to provide ionic compounds. ...

Acids and Acid Salts. ...

Binary Compounds Between Two Nonmetals.

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The balanced dissociation equation for solid barium hydroxide in aqueous solution is: Ba(OH)2(s) → Ba2+(aq) + 2OH-(aq)

Strong base barium hydroxide (Ba(OH)2) totally dissociates in water to form barium ions (Ba2+) and hydroxide ions (OH-). One molecule of barium hydroxide splits into two hydroxide ions and one barium ion in this process. The hydroxide ion has a charge of -1 and is opposite to the barium ion, which has a charge of +2. Strong base dissociation in water, where the solid substance entirely dissolves into ions, is exemplified by this process. To demonstrate how the solid barium hydroxide dissolves in water to create ions, the proper phases for each species involved in the reaction are shown.

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Answer:The solubility of a substance in water is defined as the maximum amount of solute that can be dissolved in 100 g of water at a given temperature. Hence, the solubility of sugar in water at 20â °C is 204 g.

Explanation:The solubility of a substance in water is defined as the maximum amount of solute that can be dissolved in 100 g of water at a given temperature. Hence, the solubility of sugar in water at 20â °C is 204 g.

Answer:

2.95

Explanation:

To find K for the reaction C ⇌ B, we need to use the equilibrium constant expression for this reaction, which is:

K = [B]/[C]

We can relate the concentrations of B and C to the concentration of A using the equilibrium constants K1 and K2 and the law of mass action, which states that the product of the concentrations of the products raised to their stoichiometric coefficients divided by the product of the concentrations of the reactants raised to their stoichiometric coefficients is equal to the equilibrium constant for the reaction. Using this law, we can write:

K1 = [B]/[A]

K2 = [C]/[A]

We can rearrange these equations to solve for [A] in terms of [B] and [C]:

[A] = [B]/K1

[A] = [C]/K2

Setting these two expressions for [A] equal to each other and solving for [B]/[C], we get:

[B]/[C] = K1/K2

Substituting this expression for [B]/[C] into the expression for K, we get:

K = [B]/[C] = K1/K2

Plugging in the values for K1 and K2, we get:

K = 5.90/2.00 = 2.95

Therefore, the equilibrium constant for the reaction C ⇌ B is 2.95.

In an ecosystem, 0.0015 joules of energy is available to tertiary consumer in the aquatic ecosystem.

Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.

Energy enters the system through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.

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The number of moles is 2.77 moles Option B

The heat of reaction, also known as the enthalpy of reaction, is the amount of heat absorbed or released when a chemical reaction takes place under constant pressure. It is defined as the difference between the enthalpy of the products and the enthalpy of the reactants.

The heat of reaction can be exothermic or endothermic. An exothermic reaction releases heat into the surroundings, resulting in a negative heat of reaction value. In contrast, an endothermic reaction absorbs heat from the surroundings, resulting in a positive heat of reaction value.

We can see that;

1 mole of MnO2 produces 151 kJ of heat

x moles of MnO2 would produce 418 kJ

x = 2.77 moles

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The time taken to decay is 30 years

In radioactivity, the half-life is the time it takes for half of the radioactive atoms in a sample to decay or disintegrate. The concept of half-life is important in understanding the behavior of radioactive materials and is used to describe the rate of radioactive decay.

Radioactive decay is a random process, which means that the time it takes for an individual atom to decay is unpredictable.

We know that;

N/No = (1/2)^t/t1/2

N = mass at time t

No = initial mass

t = time taken

t1/2 = half life

Thus we have that;

10/40 = (1/2)^t/15

(1/2)^2 = (1/2)^t/15

2 = t/15

t = 30 years

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It is clear from the balanced chemical  equation, that two  moles of ammonia decompose to give one mole of nitrogen gas. Then, 4.52 moles will give 2.26 moles of nitrogen gas.

Ammonia is an inorganic gas formed by the combination of nitrogen gas and hydrogen gas. It is a reversible reaction and the ammonia gas can be decomposed to given the hydrogen and nitrogen gases as written below:

[tex]\rm 2NH_{3}\rightarrow 3H_{2} + N_{2}[/tex]

As per the balanced chemical equation of the decomposition of ammonia gas, it is clear that, 2 moles of ammonia gives on mole of N₂.

Then 4.52 moles of ammonia will give,

4.52 / 2 = 2.26 moles of N₂.

Therefore, 2.26 moles of N₂ is produced from 4.52 moles of NH₃.

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Answer:

a) The balanced chemical equation for the reaction is:

3C (s) + 4H2 (g) → CH4 (g)

In this reaction, 3 carbon atoms combine with 4 molecules of hydrogen to produce one molecule of methane. The representative particles in this reaction are atoms of carbon and molecules of hydrogen and methane.

b) The balanced chemical equation for the reaction is:

2N2 (g) + 7H2 (g) → 2NH3 (g)

In this reaction, 7 molecules of hydrogen react with 2 molecules of nitrogen gas to produce 2 molecules of ammonia. The representative particles in this reaction are molecules of hydrogen, nitrogen, and ammonia.

c) The balanced chemical equation for the reaction is:

H2 (g) + Cl2 (g) → 2HCl (g)

In this reaction, 4 molecules of hydrogen react with 5 molecules of chlorine gas to produce 10 molecules of hydrogen chloride. The representative particles in this reaction are molecules of hydrogen, chlorine, and hydrogen chloride.

To determine the limiting and excess reagents and the amount of unreacted excess reactant, we need to know the initial amounts of each reactant. Without this information, we cannot determine the limiting and excess reagents or the amount of unreacted excess reactant.

The following observations could indicate that a reaction had taken place:

C. A rise in temperature

D. A drop in temperature

A change in temperature can indicate that energy has been released or absorbed during the reaction, which can be an indicator that a chemical reaction has taken place.

Changes in volume, on the other hand, are not always an indicator that a chemical reaction has occurred, as they could also be due to physical changes (such as changes in pressure or the addition/removal of a gas). Therefore, A and B alone are not sufficient to indicate that a reaction has taken place.

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10.7 x 1024 atoms of lithium reacts with nickel (II) bromide to produce 1.04 x 10-1 g of nickel.

Lithium is a chemical element with symbol Li and atomic number 3. It is a soft, silvery-white alkali metal and is the lightest of all metals. It is the least dense solid element and is the only alkali metal that does not react with air at room temperature. Lithium is highly reactive and flammable, and is used in many applications such as batteries, lubricants, pharmaceuticals, glass, ceramics, and nuclear weapons. It is used in the treatment of bipolar disorder, and its compounds are used in specialized glass and ceramics.

The mass of nickel produced in the reaction can be determined by using the atomic mass of each element. The atomic mass of lithium is 6.94 g/mol and the atomic mass of nickel is 58.69 g/mol. Using Avogadro's number, which is 6.022 x 1023 atoms/mol, we can calculate the mass of nickel produced in the reaction.

10.7 x 1024 atoms of lithium = 10.7 x 1024 / 6.022 x 1023 moles of lithium = 1.78 x 10-1 moles of lithium

1.78 x 10-1 moles of lithium x 58.69 g/mol of nickel = 1.04 x 10-1 g of nickel

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The steps required to determine the empirical formula of a compound from the mass % are:

1. Convert the mass percentages of each element to moles using the molar mass formula.

2. Divide the mass percentages among the smallest number to calculate the ratio of atoms of each element present.

3. Ensure that the ratio of atoms of each element is a ratio of integer numbers.

The empirical formula of a compound is the simplest whole number ratio of the elements present in the compound. It is often represented using the symbols of the elements involved and can be calculated from the relative masses of the elements. It is helpful in identifying the composition of a compound. For example, the empirical formula for glucose is CH2O, indicating that there is one carbon atom, two hydrogen atoms, and one oxygen atom present in the compound.

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At 25 °C, the about 194.4 g of table salt would dissolve in 540 ml of water.

At 25 °C, pure water has a concentration of 55.5 M (mol/L). H+ and OH- ions are ionized to a minor extent. Electrical conductivity experiments show that the equilibrium constant, also known as the dissociation constant, is 1.8 10-16 M at 25.

We draw this conclusion from the fact that 39.2 grams of sodium chloride dissolve in 100 grams of water at 100 degrees Celsius. The result is that the solution has exceeded the limit of the maximum permitted amount of NaCl for that mass of water by it is characterized as a supersaturated solution because of the tiny margin.

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Molarity = (moles of solute / volume of solution). Since the moles of solute (trypticase) stays the same, the molarity increases when the volume of solution decreases.

The volume of a word is an expression of the amount of content in a written piece. It can be measured in terms of the number of words, pages, or characters contained within a text. A text with a high volume will contain more content than a text with a low volume. Plagiarism-free writing is essential for a text to have a high volume, as plagiarized content does not contribute to the overall value of the piece.

The new molarity of trypticase in the cell growth medium would be 48 μM.

Molarity = (moles of solute / volume of solution)

Molarity (original) = (12 μM / 58 mL)

Molarity (new) = moles of solute (original) / volume of solution (new)

Molarity (new) = (12 μM * 58 mL) / 16 mL

Molarity (new) = 48 μM

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The empirical formula of ether is C4H10O.

The empirical formula of a compound shows the simplest whole-number ratio of atoms present in the compound. To determine the empirical formula of diethyl ether (C2H5OC2H5), we need to know the mass of each element present in the compound.

In this problem, we are given the mass of diethyl ether that was combusted, which is 2.876 g. When diethyl ether is combusted in an oxygen-rich environment, it produces carbon dioxide and water. The masses of these products are also given: 6.830 g of carbon dioxide and 3.495 g of water.

We can start by calculating the mass of carbon in the original sample of ether. To do this, we use the molar mass of carbon dioxide (44.01 g/mol) and the stoichiometry of the combustion reaction:

2 C2H5OC2H5 + 7 O2 → 4 CO2 + 6 H2O

The balanced equation shows that for every two molecules of ether, four molecules of carbon dioxide are produced. Therefore, we can write:

2.876 g ether × (4 mol CO2 / 2 mol ether) × (1 mol C / 1 mol CO2) × (12.01 g / 1 mol C) = 5.716 g C

We can perform a similar calculation to determine the mass of hydrogen in the sample:

2.876 g ether × (6 mol H2O / 2 mol ether) × (2 mol H / 1 mol H2O) × (1.01 g / 1 mol H) = 4.352 g H

Finally, we can calculate the mass of oxygen by subtracting the masses of carbon and hydrogen from the total mass of the sample:

2.876 g ether - 5.716 g C - 4.352 g H = 0.808 g O

Now that we know the mass of each element, we can use these values to calculate the empirical formula. We divide each mass by the molar mass of the corresponding element, and then divide the resulting values by the smallest value to obtain whole-number ratios:

C: 5.716 g / 12.01 g/mol = 0.476 mol

H: 4.352 g / 1.01 g/mol = 4.31 mol

O: 0.808 g / 16.00 g/mol = 0.0505 mol

Dividing by the smallest value (0.0505 mol) gives the following ratios:

C: 9.43

H: 85.2

O: 1.00

To obtain whole-number ratios, we can divide each value by the smallest value:

C: 9.43 / 1.00 ≈ 9

H: 85.2 / 1.00 ≈ 85

O: 1.00 / 1.00 = 1

Therefore, the empirical formula of diethyl ether is C4H10O.

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Henry’s law states that the amount of a gas that dissolves in a solution is proportional to the pressure of the gas.

Henry's law is a gas law that states that the amount of a given gas that will dissolve in a given type and volume of liquid is directly proportional to the partial pressure of that gas above the liquid. The law was named after chemist William Henry, who first proposed it in 1803. Henry's law is expressed mathematically as: P = kH x c, where P is the partial pressure of the gas, kH is the Henry's law constant, and c is the concentration of the gas in the liquid. This law is applicable to gases that are relatively insoluble in liquids, such as nitrogen, oxygen, and carbon dioxide.

As the diver ascends to the surface, the pressure on the nitrogen gas decreases rapidly which results in an increased amount of gas being released from the solution. This release of nitrogen gas forms bubbles in the diver’s bloodstream, leading to decompression sickness.

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The correct option for the catalyzed decomposition for given dinitrogen monoxide are- A. 1, 2, and 4

Nitrous oxide, also referred to as laughing gas, nitrous, simply nos, is a chemical substance that has the formula N2O and is also known as dinitrogen oxide as well as dinitrogen monoxide.

The fundamental procedures for dinitrogen monoxide's catalyzed breakdown are:

N2O (g) + NO (g) → N2 (g) + NO2 (g)

2 NO2 (g) → 2 NO (g) + O2 (g)

Thus, the correct statements are-

1. The overall balanced reaction is 2 N2O (g) → 2 N2 (g) + O2 (g).

2. NO (g) is a catalyst for the reaction.

4. NO2 (g) is a reaction intermediate.

Therefore, A. 1, 2, and 4 is the correct option.

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Answer:

i like butting hole

Explanation:

mkrkr

Answer:

Approx. 1200g

Explanation:

You have given the stoichiometric equation:

2LiOH(s)+CO2(g)→Li2CO3(s)+H2O(l)

.And this unequivocally tells us that each mole of carbon dioxide required 2 moles of lithium hydroxide:

Moles of LiOH = 1.3×103⋅g/23.95⋅g⋅mol−1=54.3⋅mol

And thus

27.1⋅mol

CO2 can be absorbed:

27.×44.01gmol−1≅1.2 kg

Explanation: