Describe how the organelles in a cell work together to keep an organism alive​

The percent yield shows the extent to which the reactants are converetd into products . The limiting reactant is used up in the reaction.

A limiting reactant is the reactant that is in the least amount in the system.  Now;

Number of moles of Fe =  12.21 g/56 g/mol = 0.22 moles

Number of moles of O2 = 13.54 g/32 g/mol = 0.42 moles

Balanced reaction equation;

3Fe(s) + 2 O2(g) = Fe3O4(s)

If 3 moles of Fe reacts with 2 mole of O2

0.22 moles of Fe reacts with  0.22 moles * 2 mole/3 moles = 0.15 moles

Hence, Fe is the limiting reactant

If 3 mole of Fe produces 1 mole of  Fe3O4(s)

 0.22 moles  of O2   produces   0.22 moles * 1 mole/3 moles of  Fe3O4(s) = 0.1073 moles

Mass of  Fe3O4(s) =0.1073 moles  * 232 g/mol =16.9 g

Number of moles of excess reactant = 0.42 moles - 0.15 moles = 0.27 moles

Mass of excess reactant = 0.27 moles * 32 g/mol = 8.64 g

percent yield = 15.88 g/16.9 g * 100/1

= 93.4%

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The solution with the greatest boiling-point elevation among the given options is Mg(NO₃)₂.

The boiling-point elevation of a solution depends on the concentration of solute particles. In this case, we have three solutions: Mg(NO₃)₂, NaNO₃, and C₂H₄(OH)₂.

Mg(NO₃)₂ dissociates into three ions: Mg²⁺ and two NO₃⁻ ions. NaNO₃ dissociates into two ions: Na⁺ and NO₃⁻. C₂H₄(OH)₂ does not dissociate, so it remains as one molecule.

Since the boiling-point elevation is directly proportional to the number of solute particles, Mg(NO₃)₂, with three ions per formula unit, will have the greatest boiling-point elevation. NaNO₃ has two ions per formula unit, and C₂H₄(OH)₂ has no ionization, resulting in fewer solute particles and lower boiling-point elevation compared to Mg(NO₃)₂.

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Answer:

It began to rust.

Explanation:

Because it had been left out for a long time

Answer:

Fluid friction describes the friction between layers of a viscous fluid that are moving relative to each other

Hope it helps

Please mark me as the brainliest

Thank you

Answer:

151.33 g/mol

Explanation:

TRUST ME -_-

Answer:

-1670.24 kJ

QUICK Explanation:

ΔH * moles of limiting reactant  = Energy produced

-572 kJ/mol * 2.92 moles of O2 = -1670.24 kJ

LONGER EXPLANATION :

2 H2 + O2 -> 2 H2O

ΔH * moles of limiting reactant  = Energy produced

enthalpy change or heat of reaction formula

1. Calculate the number of moles of oxygen (O2):

  Number of moles = mass / molar mass

  Number of moles of O2 = 93.5 g / 32.00 g/mol

                      ≈ 2.92 mol O2

2. Calculate the number of moles of hydrogen (H2):

  Number of moles = mass / molar mass

  Number of moles of H2 = 13.2 g / 2.02 g/mol

                      ≈ 6.53 mol H2

3. Determine the limiting reactant:

  According to the balanced equation,

  2 moles of H2 react with 1 mole of O2.

  Calculate the moles of O2 based on the moles of H2:

  (6.53 mol H2) / (2 mol H2/O2) = 3.27 mol O2

we need 3.27 mol O2  to react with the available H2

BUT only have 2.92 mol of O2 available

O2 is the limiting reactant

4.

Calculate the heat given off by assuming the complete consumption of the limiting reagent

calculate the amount of energy produced using the given enthalpy change (ΔH):

Energy produced = ΔH * moles of limiting reactant

Energy produced = ΔH * moles of O2 reacted

Calculate the energy produced using the given enthalpy change (ΔH):

  Energy produced = ΔH * moles of O2 reacted

                 = -572 kJ/mol * 2.92 mol

                 ≈ -1670.24 kJ

Therefore, approximately -1670.24 kJ of energy is produced when 93.5 grams of oxygen react with 13.2 grams of hydrogen in the given reaction. Note that the negative sign indicates that the reaction is exothermic (energy is released).

chatgpt

To neutralize a given volume of household bleach, you would need a similar volume of a solution containing a reducing agent.

Household bleach is typically a solution of sodium hypochlorite (NaClO), which is an oxidizing agent.

To neutralize its oxidizing properties, a reducing agent is required. A reducing agent is a substance that can donate electrons and counteract the oxidizing effects.

Common examples of reducing agents that can be used to neutralize bleach include sodium bisulfite (NaHSO3), sodium thiosulfate (Na2S2O3), or ascorbic acid (vitamin C).

These reducing agents react with the hypochlorite ions in bleach, converting them into harmless compounds.

When neutralizing bleach, it is important to carefully follow safety guidelines and use appropriate protective measures, as bleach and its reactions can release harmful gases or generate heat.

It is advisable to consult professional advice or refer to specific instructions for the safe neutralization of household bleach.

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Answer:

0.3mol C8H18

Explanation:

For this we must first look at the reaction taking place:

C8H18+O2 --> H2O + CO2

Balancing the equation we get:

2(C8H18)+25(O2) --> 18(H2O) + 16(CO2)

Form there we now need to know how many moles of Octane are needed to produce 2.4moles of H2O. The conversion is as follows:

2.4molH2O ((2mol of C8H18)/(18mol of H2O)) = 0.3mol C8H18

Answer:

1039.482

Explanation:

Answer:

Explanation:

Here, we want to get the new volume of the gas

What we need to know is the law that connects volume and pressure at constant temperature

The law that supports this is the Boyle's law

It states that the volume of a given mass of gas is inversely proportional to its pressure at constant temperature

Mathematically, we can have this as represented as:

We can proceed mathematically to solve as follows;

Answer:

Frog, shark, snake, Lion, tortoise, salamander, ostrich

Answer:

The person above me is correct it is frog, shark, snake, Lion, tortoise, salamander, ostrich

Explanation:

Answer:

different versions of existing forms

Explanation:

Answer:

To convert among units in the metric system, identify the unit that you have, the unit that you want to convert to, and then count the number of units between them. If you are going from a larger unit to a smaller unit, you multiply by 10 successively. If you are going from a smaller unit to a larger unit, you divide by 10 successively

Explanation:

hope it helps

The solubility of a compound refers to the maximum amount of the compound that can dissolve in a given solvent under specific conditions. The solubility of a compound depends on various factors, such as temperature, pressure, and the pH of the solution. In this case, we are given the solubility product constant (Ksp) for Al(OH)3, which is an indicator of the compound's solubility.

To calculate the solubility of Al(OH)3 in water (a), we need to find the concentration of the hydroxide ions (OH-) in the solution. Since Al(OH)3 dissociates into three OH- ions, we can use the Ksp expression to solve for the concentration of OH-. The Ksp expression for Al(OH)3

Therefore, the solubility of Al(OH)3 in water is 1.24 x 10^-11 moles per liter (mol/L).

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There would be an increase in the concentration of carbonic acid - this is how an increase in carbon dioxide concentration influences the system.

In chemistry, a dynamic equilibrium lives once a reversible reaction occurs. Substances transition between the reactants and products at equal rates, indicating there is no net change. Reactants and products exist formed at such a rate that the concentration of neither changes. It is a precise example of a system in a steady state. After a time, a reversible reaction in a closed system can get what we call a dynamic equilibrium.

The correct answer is option D.

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The graph to the left represents the relationship between ΔG° because S° is positive, TS° becomes a larger positive number as T increases.

The relationship between ΔG° (standard free energy change) and temperature (T) of a reaction is described by the following equation:

ΔG° = -RTlnK

where R is the gas constant, T is the temperature in Kelvin, and K is the equilibrium constant of the reaction. This equation is known as the Gibbs-Helmholtz equation.

From this equation, ΔG° and temperature are inversely proportional to each other. As the temperature increases, the value of ΔG° becomes less negative (or more positive), which means that the reaction becomes less spontaneous. Similarly, as the temperature decreases, the value of ΔG° becomes more negative (or less positive), which means that the reaction becomes more spontaneous.

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The activation of fatty acids for degradation takes place in two steps, Acetyl CoA derived from fatty acids inhibits pyruvate dehydrogenase, the enzyme that converts pyruvate into acetyl CoA.

A saturated or unsaturated carboxylic acid with an aliphatic chain is referred to as a fatty acids. The majority of naturally occurring fatty acids have an unbranched chain with 4 to 28 carbon atoms, which is an even number. Fatty acids are crucial nutritional sources of energy for animals in any of these forms, as well as crucial cellular building blocks. environmental degradation is the process by which anything loses its beauty or quality. Degradation of the environment is the outcome of the complex interaction of socioeconomic, institutional, and technical activity. Economic expansion, population increase, urbanization, intensification of agriculture, rising energy usage, and transportation are just a few of the elements that may contribute to environmental changes.

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You must go to the mountain or apraturakados to answer this question. It will be a daring adventure, but the journey will be worth it. Good luck, student.

The actual answer is 7.58, sorry...

When A solution at 25 degrees Celsius has a pOH of 6.42. So here the pH of the solution is 7.58.

Since we know that

pH + pOH = 14

here

pOH is 6.42

So,

pH = 14 - pOH

= 14 - 6.42

= 7.58

hence, When A solution at 25 degrees Celsius has a pOH of 6.42. So here the pH of the solution is 7.58.

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The required heat in BTU, for the water at 50°C to become ice at -50°C is 209 BTU/lb.

To determine the required heat in BTU, for the water at 50°C to become ice at -50°C, we need to calculate the heat of fusion and the heat of cooling of water. We can use the following formula to calculate the required heat.

Q = mL

Where:Q is the required heat in BTU.

m is the mass of water in pounds.L is the specific heat of water at the desired temperature.

Lf is the heat of fusion of water.

Lc is the specific heat of ice.

Using the above formula, we get;

Q = mLf + mL + mLc

The heat of fusion of water is 144 BTU/lb

The specific heat of water at 50°C is 1.00 BTU/lb °F.

The specific heat of ice is 0.5 BTU/lb°F.

We know that: 1°C = 1.8°F.

So,50°C = 122°F and -50°C = -58°F

Also, the mass of water is not given, so let us assume that the mass of water is 1 lb.

Thus;

Q = mLf + mL + mLc

Q = 1(144) + 1(1.00)(122-32) + 1(0.5)(-50-0)

Q = 144 + 90 + (-25)

Q = 209 BTU/lb

Therefore, the required heat in BTU, for the water at 50°C to become ice at -50°C is 209 BTU/lb.

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The number of the molecules of water is 1.8 g is  6.02 * 10^22 molecules.

We can be able to obtain the molecules from the Avogadro's number. We know that the number of the molecules that we find in the compound can be gotten by the use of the proposition that was put forward by Avogadro.

Number of moles of the water = 1.8g/18 g/mol = 0.1 moles

We know that;

1 mole of water contains 6.02 * 10^23 molecules of water

0.1 moles of water would contain 0.1 mole * 6.02 * 10^23 molecules/ 1 mole

= 6.02 * 10^22 molecules

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When a piece of copper wire is placed in a solution of nitric acid, the following balanced redox (acidic) equation is formed:3 Cu + 8 HNO3 → 3 Cu(NO3)2 + 2 NO + 4 H2OWhen copper (Cu) is oxidized by nitric acid (HNO3), the copper atoms are transformed into Cu2+ ions.

Nitric acid acts as a reducing agent in this reaction. It causes the reduction of some of its nitrate ions (NO3-) to nitrogen dioxide (NO) gas. Here, nitric acid is an oxidizing agent. The nitrogen dioxide that is generated reacts with the water in the solution to form nitric acid and nitrogen oxide.

It is an intermediate species that is further oxidized by the nitric acid solution to nitrate ions. Therefore, the balanced redox (acidic) equation for this reaction is 3 Cu + 8 HNO3 → 3 Cu(NO3)2 + 2 NO + 4 H2O.

This equation is balanced with respect to both mass and charge. The total mass of the reactants equals the total mass of the products, and the total charge of the reactants equals the total charge of the products.

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All six electrons from the 3p sublevel are included in the Lewis symbol. The valence electrons are the electrons in the outermost energy level which in this case is the 3p sublevel.

The electron configuration of an element specifies the number of electrons in each energy level or orbital. The Lewis symbol, on the other hand, shows the valence electrons of an element, which are the electrons in the outermost energy level. To determine the Lewis symbol of an element, we only consider the valence electrons.

The first part of the notation, "2p²", refers to the 2p sublevel of the atom, which is a region of space where two electrons are located.

The second part of the notation, ".223 1:22:22p", refers to the 3p sublevel of the atom, which is a region of space where six electrons are located. The numbers "223" indicate the specific arrangement of the electrons in the sublevel, while the numbers "1:22:22" refer to the arrangement of electrons in other sublevels.

The valence electrons are the electrons in the outermost energy level, which in this case is the 3p sublevel. Therefore, the Lewis symbol for this electron configuration includes only the valence electrons, which are the six electrons in the 3p sublevel. The Lewis symbol for this electron configuration is thus:

3p⁶.

Therefore, all six electrons from the 3p sublevel are included in the Lewis symbol.

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A redox reaction is a chemical reaction in which one or more of the reacting species undergoes oxidation and one or more undergoes reduction. An oxidizing agent is an element or compound that oxidizes another substance, while a reducing agent is an element or compound that reduces another substance.

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The coefficient of Fe would be 2, the coefficient of Cl2 would be 3, while the coefficient of FeCl2 would be 2.  

The balanced equation of the reaction would be as follows:

\(2Fe(S) + 3Cl_2 ---> 2FeCl_3(S)\)

Thus, the coefficients of Fe, Cl2, and FeCl3 respectively would be 2, 3, and 2.

In other words, 2 moles of Fe require 3 moles of Cl2 to produce 2 moles of FeCl3 in a complete reaction.

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Answer: The charge on the cobalt ion is 2+.

Explanation:

Consider the substance cobalt phosphate: Co3(PO4)2.

We memorize that the phosphate ion has negative 3 charge:  PO4^3-

So, with two phosphate ions, the charge will be negative 6 overall.

With three cobalt ions, we require a charge of 2+ on each to balance the substance.

The charge on each cobalt (Co) Ion in cobalt phosphate [Co3(PO4)2] is 2+ as this is required to balance the 6- charge of the two phosphate ions in the compound.

The charge on a cobalt (Co) Ion in cobalt phosphate [Co3(PO4)2] is determined based on the balance ion charge in the compound. The phosphate ion (PO4) has a charge of 3- and there are two of these ions in the compound, summing up to a total charge of 6-. There are three cobalt ions in the compound, so to balance the 6- charge of the phosphates, each cobalt Ion must carry a charge of 2+. In other words, the cobalt ion in cobalt phosphate [Co3(PO4)2] is 2+ (or option B).

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Extrusion is the feature form at Earth's surface from the cooling of lava.

They are the ones that originate from a sudden cooling of the incandescent magma when it comes to the surface, which means that there is no time for crystals to form, either partially or totally.

Therefore, we can conclude that typical volcanic rocks are formed by the rapid cooling of lava and pyroclastic fragments.

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Answer:

A.

Explanation: