Hexane burns in air to form carbon dioxide and water. The oxygen is store at 40.0 Celsius and at a pressure of 106.6kPa. How many moles of oxygen will react with 500. Grams of hexane

Suger dissolve in coffee is only a physical change or property. So, the option (a) is right choice here.

A physical change is a type of change in which the form of matter (substance) changes, but without the change of one substance into another. A physical change, changes the shape, size, or phase of matter. For example, if you carve a piece of wood into a baseball bat, it will burn in fire and float on water. It's still a tree, so it's a physical change. Similarly, crumpling paper, getting a haircut, dissolving salt in water, melting wax, making ice cubes, chopping vegetables for a tossed salad are all physical changes. There are 4 options and you need to decide which option causes a physical change. As you can see in option (c), the color of autumn leaves is a chemical change. Similarly, in option (d), the burning of cookies in the oven is based on temperature, which is a chemical change. As bananas ripen, brown bananas are a chemical change due to the formation of a new, darker (and less palatable) substance. So option (a) is the correct.

To learn more about physical change, refer:

https://brainly.com/question/14444325

#SPJ4

Complete question:

Which of the following is only a physical change? group of answer choices

a) sugar dissolves in coffee.

b) a banana ripens.

c) leaves turn colors in the fall.

d) cookies burn in the oven.

Answer: The solid turns into liquid during melting.

Explanation:

a. The process of a solid turning into liquid is called melting. The solid ice turns into a liquid during the melting process. The solid molecules gain energy and flow as a liquid.

b. The energy of the molecules increases in the liquid state. When the ice turns into a liquid the energy of the molecules increases. The application of heat or excess temperature increases the energy of the molecules.

In this example, the exam, Carlos concerns, and his behavior may be seen as an example of eustress.

Stress is a normal physiological and psychological reaction that people have in response to their surroundings. Eustress refers to positive, motivating stress that improves functioning, whereas distress refers to negative, overwhelming stress that impairs functioning.

Eustress refers to positive stress, which can be psychological, physical, or biochemical/radiological. Endocrinologist Hans Selye coined the term, which combines the Greek prefix eu-, which means "good," and stress, which literally means "good stress." Eustress refers to beneficial stress, which can be psychological, physical, or biochemical/radiological in nature.

Since Carlos has a comprehensive final exam in three weeks that he is concerned about and this made him to go ahead and start studying, this is eustress.

Exhilarating rides, competition, and a good scary movie are all examples of Eustress.

Learn more about eustress on;

https://brainly.com/question/999222

#SPJ1

Complete question

Carlos has a comprehensive final exam in three weeks that he is concerned about. His concerns prompt him to go ahead and start studying and in doing so, he feels less worried as the exam approaches. In this example, the exam, Carlos concerns, and his behavior may be seen as an example of ?

Answer:

a) club soda is a compound

b) Club soda is a manufactured form of carbonated water, commonly used as a drink mixer. Sodium bicarbonate, potassium sulfate, potassium bicarbonate, potassium citrate, or sodium citrate is artificially added to replicate constituents commonly found in natural mineral waters

The monitoring and diagnosis of fouling are essential for engineers to determine when to remove the heat exchanger temporarily for mechanical cleaning to maintain high heat transfer coefficients and save energy.

Seven categories of control objectives are as follows:

(a) The control for the safety of the flash drum is achieved through controlling pairs (an FCE matching a specific CV).

(b) Environmental protection can be achieved by preventing leaks and spills and following proper waste disposal procedures.

(c) Pump protection is achieved through controlling pair (differential pressure switches and flow rate switches).

(d) Smooth operation and product quality are achieved through controlling pair (an FCE matching to a specific CV).

(e) Product quality is achieved through controlling pair (an FCE matching to a specific CV).

(f) High profit is achieved through controlling pair (an FCE matching to a specific CV).

(g) Monitoring & diagnosis of fouling is necessary for engineers to decide when to remove the heat exchanger temporarily for mechanical cleaning to restore a high heat transfer coefficient to save energy.

The control objectives have been categorized into seven types, including safety, environmental protection, pump protection, smooth operation, product quality, high profit, and monitoring & diagnosis of fouling. Controlling pairs and FCEs are used to achieve these control objectives. By regulating the input and output variables, they provide better product quality and increased efficiency. The monitoring and diagnosis of fouling are essential for engineers to determine when to remove the heat exchanger temporarily for mechanical cleaning to maintain high heat transfer coefficients and save energy.

Learn more about high heat transfer coefficients

https://brainly.com/question/30897418

#SPJ11

Answer:

H2O with 2 hydrogen and 1 oxygen

An amide that has a molecular ion with an m/z value of 129.

The molecular formula is C₉H₁₃NO.

To determine the molecular formula of the amide with an m/z value of 129, we need to consider the possible combinations of carbon (C), hydrogen (H), nitrogen (N), and oxygen (O) that would yield that molecular mass.

The m/z value of 129 indicates the mass-to-charge ratio of the molecular ion. Since we're dealing with a neutral molecule, we can assume a charge of +1 for the molecular ion. Therefore, the molecular mass would be equal to 129.

To find the molecular formula, we can consider different combinations of elements that sum up to a molecular mass of 129. Here are a few possibilities:

1. C₈H₁₁NO: In this case, the sum of the atomic masses is (8 × 12.01) + (11 × 1.01) + 14.01 + 16.00 = 128.09, which is close to the desired molecular mass but not exactly 129.

2. C₈H₁₀N₂O: In this case, the sum of the atomic masses is (8 × 12.01) + (10 × 1.01) + (2 × 14.01) + 16.00 = 128.14, which is also close to 129 but not exact.

3. C₉H₁₃NO: In this case, the sum of the atomic masses is (9 × 12.01) + (13 × 1.01) + 14.01 + 16.00 = 129.12, which is very close to 129.

Therefore, the molecular formula that best fits the given m/z value of 129 is C₉H₁₃NO.

To know more about m/z value here

https://brainly.com/question/31482540

#SPJ4

Answer:

I say the 1st one I'm so terrible sorry if I'm wrong

Explanation:

Water can take many forms. At low temperatures (below 0°C), it is a solid. When at “normal” temperatures (between 0°C and 100°C), it is a liquid. While at temperatures above 100°C, water is a gas (steam).

The state the water is in depends upon the temperature.  Each state (solid, liquid, and gas) has its own unique set of physical properties.

CO2 has the strongest carbon-oxygen average bond order among the given species, with a bond order of 2

The bond order between carbon and oxygen in a molecule or ion is determined by the number of bonds shared between the two atoms. A higher bond order indicates a stronger bond between carbon and oxygen. Among the given species, CO2 has a double bond between carbon and each oxygen atom, resulting in a bond order of 2. Therefore, CO2 has the strongest carbon-oxygen average bond order.
CH3OCH3 has no direct carbon-oxygen bond, so it does not contribute to the carbon-oxygen bond order. CH3COO- has a single carbon-oxygen bond and one resonance structure with a double bond, giving an average bond order of 1.5. CO32- has three carbon-oxygen bonds with a bond order of 1, resulting in an average bond order of 1. CO has a triple bond between carbon and oxygen, giving a bond order of 3, but it is not an ion or a molecule in this case. In summary, CO2 has the strongest carbon-oxygen average bond order among the given species, with a bond order of 2.

learn more about bond order Refer: https://brainly.com/question/12447843

#SPJ11

Answer:

they're a non renewable source

Explanation:

Coal and petroleum, are formed by the deposit of organisms that have died a million years ago. under pressure and high temperature underground the dead organisms that used to live millions of years ago are formed into petroleum. however, coal is formed by the deposit of dead plants in the same process as petroleum. for the formation of petroleum and coal it takes a long term of time for it to be formed (millions of years). and that's why its limited

Answer:

Hi!!

Coal and petroleum deposits in the earth are limited.

They are non renewable resources. They are formed after a long period. They are formed by the remains of dead plants and animals present deep inside the earth crust. It took millions of years to get converted into coal and petroleum.

Hope it helps!!!!

In the periodic table, on moving downward, there has been an increase in the total electrons. Thus, option C is correct.

The periodic table has been the arrangement of elements in the increasing order of the atomic number, and similarity in the chemical properties.

The fluorine has been the most electronegative element in the periodic table. Fluorine and Chlorine has been nonmetals of group 17. The valence of electrons in the period have been equal.

The total electrons in  the table increases with increase in atomic number.

The ionic charge has been the charge possessed by the element in the ionic form. The elements in the same group has been composed of similar equivalent charge.

Thus, in the periodic table, on moving downward there has been an increase in the total electrons. Thus, option C is correct.

Learn about periodic table, here:

https://brainly.com/question/11155928

Starting with 32.0 g of a radioactive substance, 2.0 g remains after four half-lives.

Each half-life of a radioactive substance results in half of the original material remaining. After the first half-life, you would have 1/2 of the original amount remaining, after the second half-life you would have 1/4 remaining, after the third half-life you would have 1/8 remaining, and after the fourth half-life, you would have 1/16 of the original amount remaining.

Therefore, if you have 2.0 g remaining after four half-lives, you can calculate the original amount using the following equation:

2.0 g = (1/16) x original amount

Solving for the original amount, we get:

original amount = 2.0 g x 16 = 32.0 g

To know more about the radioactive substance refer here :

https://brainly.com/question/31765647#

#SPJ11

In the electron transport chain, Complex III is responsible for the oxidation of UQH2 in a two-electron process. Complex III is also known as the Coenzyme Q: cytochrome c oxidoreductase complex. It is the third complex in the electron transport chain and is responsible for pumping protons into the intermembrane space, contributing to the proton motive force.

The first step in the Complex III of the electron transport chain involves the oxidation of UQH2. In this step, two electrons are removed from UQH2, and they are passed onto the first of the two cytochrome b subunits. This results in the reduction of the two heme groups present in cytochrome b. One of the electrons that have been removed from UQH2 is then transferred to a ubiquinone molecule bound to the second cytochrome b subunit. This reduces the ubiquinone molecule to ubiquinol. The second electron that was removed from UQH2 is passed to cytochrome c1, which then passes it onto cytochrome c. The electron transport chain is responsible for generating a proton gradient across the inner mitochondrial membrane. This is achieved through the pumping of protons by complexes I, III, and IV into the intermembrane space. The proton motive force generated by the electron transport chain drives ATP synthesis by ATP synthase, which uses the proton gradient to produce ATP. Therefore, Complex III plays an important role in the generation of the proton motive force, which is essential for ATP synthesis.

To Know more about mitochondrial membranes visit:

brainly.com/question/31797295

#SPJ11

Answer:

Ca(NO3)2 + 2H2O.

Explanation:

The term "neutralization reaction" refers to a chemical process in which an acid is neutralized by a base and water is created as a byproduct.

Nitric acid and calcium hydroxide, which is a base, react to produce calcium nitrate and water as a byproduct.

The AGº for the phosphorylation of ADP by phosphoenolpyruvate is equal to 32 kJ/mol.

The AGº for the phosphorylation of ADP by phosphoenolpyruvate can be calculated using the equation:

AGº = AGº (ATP hydrolysis) - AGº (phosphoenolpyruvate hydrolysis)

Given that AGº (ATP hydrolysis) = -30 kJ/mol and AGº (phosphoenolpyruvate hydrolysis) = -62 kJ/mol, then:

AGº = -30 kJ/mol - (-62 kJ/mol) = 32 kJ/mol

NADH: An increase in the concentration of NADH can inhibit PDH, as it competes with pyruvate for binding to the active site of the enzyme.

Acetyl-CoA: An increase in the concentration of acetyl-CoA can also inhibit PDH, as it acts as an allosteric inhibitor

Therefore, the AGº for the phosphorylation of ADP by phosphoenolpyruvate is equal to 32 kJ/mol.

Learn more about concentration here

https://brainly.com/question/10725862

#SPJ4

The molar mass of the unknown triprotic acid is 18.78 g/mol.

The molar mass of the unknown triprotic acid can be calculated using the equation:

Molar mass (g/mol) = (Volume of NaOH solution (L) * Molarity of NaOH) / Mass of acid (g)

First, convert the volume of NaOH solution to liters: 32.47 ml = 0.03247 L.

Then, substitute the values into the equation:

Molar mass (g/mol) = (0.03247 L * 0.1224 mol/L) / 0.2120 g.

Simplify the equation:

Molar mass (g/mol) = 0.00397896 mol / 0.2120 g.

Calculate the molar mass:

Molar mass (g/mol) = 18.78 g/mol.

Therefore, the molar mass of the unknown triprotic acid is 18.78 g/mol.

Learn more about molar mass here:

https://brainly.com/question/31545539

#SPJ11

Answer:

I forgot dude sorry so sorry

Answer:

255 grams of ammonia

Explanation:

To solve this problem, we need to use the balanced chemical equation for the reaction between ammonia and water:

NH3 + H2O → NH4+ + OH-

From this equation, we can see that one molecule of ammonia reacts with one molecule of water to produce one hydroxide ion (OH-) and one ammonium ion (NH4+). Therefore, we need the same number of molecules of ammonia as water to form the products.

So, if we have 9.09X^23 molecules of water, we need the same number of molecules of ammonia:

9.09X^23 molecules of NH3

To calculate the mass of ammonia required, we need to use the molar mass of ammonia, which is approximately 17 g/mol:

1 mol of NH3 = 17 g

To convert the number of molecules of NH3 to grams, we need to use Avogadro's number:

1 mol = 6.022 × 10^23 molecules

Therefore, the mass of ammonia required is:

9.09X^23 molecules of NH3 * (1 mol/6.022 × 10^23 molecules) * 17 g/mol

= 2.55 × 10^2 g or 255 grams (rounded to two significant figures)

So, we need 255 grams of ammonia to form 9.09X^23 molecules of water.

The molar mass of a compound is the sum of the atomic masses of all the atoms present in one molecule of the compound. the molar mass of manganese hydroxide is 88.94 g/mol.

To calculate the molar mass of manganese hydroxide, we need to find the atomic masses of each of the elements and add them up in the correct proportions.

The atomic mass of manganese (Mn) is 54.94 g/mol.

The atomic mass of hydrogen (H) is 1.01 g/mol, and the atomic mass of oxygen (O) is 16.00 g/mol.

The formula for manganese hydroxide is Mn(OH)₂, which means there are two hydroxide ions (OH⁻) present for every one manganese atom.

To calculate the molar mass of manganese hydroxide, we add up the atomic masses of all the atoms present in one molecule of the compound: Molar mass of Mn(OH)₂ = (atomic mass of Mn) + 2(atomic mass of O) + 2(atomic mass of H) = 54.94 g/mol + 2(16.00 g/mol) + 2(1.01 g/mol) = 88.94 g/mol

Therefore, the molar mass of manganese hydroxide is 88.94 g/mol.

For more questions on manganese hydroxide

https://brainly.com/question/15516767

#SPJ8

Dalton's Law of Additive Pressure states that in a mixture of gases, the total pressure exerted by the mixture is equal to the sum of the partial pressures of each individual gas component.

Dalton's Law of Additive Pressure states that in a mixture of gases, the total pressure exerted by the mixture is equal to the sum of the partial pressures of each individual gas component.

In the given scenario, the room contains moist air composed of 0.3 moles of oxygen, 0.6 moles of nitrogen, and 0.1 moles of water vapor at room temperature and pressure.

To determine the specific enthalpy of each component, we need to consider the properties of the gases.

i. The total number of moles of moist air in the room can be calculated by summing the moles of each component: 0.3 + 0.6 + 0.1 = 1 mole.

ii. The specific enthalpy of oxygen can be determined by multiplying the moles of oxygen (0.3) by the specific enthalpy of air at 25°C (298.18 kJ/kg). This gives us the specific enthalpy of oxygen.

iii. Similarly, the specific enthalpy of nitrogen can be obtained by multiplying the moles of nitrogen (0.6) by the specific enthalpy of air.

iv. The specific enthalpy of water vapor can be calculated by multiplying the moles of water vapor (0.1) by the specific enthalpy of air.

By performing these calculations, we can determine the specific enthalpies of each component of the moist air mixture.

Learn more about Dalton's Law of Additive Pressure

brainly.com/question/14119417

#SPJ11

Explanation:

Answer:

\(C_{36}\)\(H_{32}\)\(Cl_{4}\)\(N_{6}\)\(O_{4}\)

At the equilibrium potential for sodium (Na+), the concentration of sodium ions is generally higher outside the cell compared to inside the cell. The equilibrium potential is the membrane potential at which there is no net movement of ions across the cell membrane.

It is determined by the balance between the concentration gradient and the electrical potential across the membrane.

In the case of sodium, the equilibrium potential (also known as the Nernst potential) for Na+ is positive, typically around +60 to +70 millivolts inside the cell with respect to the outside.

This means that at the equilibrium potential, sodium ions would tend to move into the cell due to the concentration gradient.

In normal physiological conditions, cells actively maintain a sodium concentration gradient by using energy-dependent ion pumps, such as the sodium-potassium pump, which moves sodium ions out of the cell and potassium ions into the cell.

This process helps maintain a higher concentration of sodium ions outside the cell compared to inside.

Read more about Equilibrium potential.

https://brainly.com/question/30454476

#SPJ11

The produced at the anode in the electrolysis of molten CuF2 is A. F₂.

During electrolysis, CuF₂ will separate into Cu₂⁺ cations and F⁻anions. Cu₂⁺ will be reduced to copper metal, which will deposit on the cathode, whereas F⁻ anions will be oxidized to fluorine gas on the anode in the electrolysis of molten CuF₂. Hence, the answer is option A. Fluorine gas (F₂) is generated at the anode in the electrolysis of molten CuF₂.

Therefore, during the electrolysis of molten CuF₂, Cu₂⁺ is reduced to copper metal, which deposits on the cathode, and F⁻ anions are oxidized to fluorine gas on the anode, which is produced at the anode. The chemical reactions taking place during electrolysis of CuF₂ are given below: At the cathode, Cu₂⁺ cations get reduced to copper metal. Cu₂⁺ + 2e⁻ ⟶ Cu. At the anode, F⁻ anions get oxidized to fluorine gas. 2F⁻ ⟶ F₂ + 2e⁻. Therefore, option A is correct.

Learn more about electrolysis at:

https://brainly.com/question/12994141

#SPJ11

Answer:

i dont know

Explanation:

Answer:

Silicon conducts electricity as well as copper does.

Explanation:

you didn't gave any statements to choose the answer from.

but otherwise, what all I my knowledge says that Silicon conducts electricity as well as copper does.

The endocrine system is a complex system of glands and hormones that regulate many bodily functions and maintain homeostasis. Homeostasis refers to the body's ability to maintain a stable internal environment despite changes in the external environment. One example of the endocrine system maintaining homeostasis is the regulation of blood sugar levels by the pancreas.

For such more question on homeostasis

https://brainly.com/question/1046675

#SPJ8

The molecule expand to relieve steric strain before undergoing torsion to a non-planar structure in order to have several resonating structures.

It should be noted that a molecule simply mean the group of atoms that are bonded together that represents the smallest fundamental unit if the chemical compound.

It should be noted that structures containing fused benzene rings have extensive conjugation. Due to this, they can undergo resonance.

This is vital in decreasing the overall energy of the molecule and helps increase its stability. When there's a change in torsion angle to relieve the steric strain, the molecule won't be planar, hence, the energy will increase and the stability will reduce.

Learn more about molecules on:

brainly.com/question/26044300

#SPJ1

Answer:

.0172 mole of CO2

Explanation:

PV = nR T      n = number of moles      V = .5 liter

                       R = gas constant = .082057 L atm/(k mole)

                           T needs to be in Kelvin =  C + 273.15

.868  * .5  = n * .082057 * ( 35 + 273.15)

 n = .0172 moles

Explanation:

Using a fractional column will help to separate liquids whit different boiling points since the mixture contain ethanol water and propanaol. Ethanol will be the first to be extracted since it has a low boiling point then it would be water and then propanaol.

The molarity of calcium hydroxide if 15 ml of the solution is neutralized by 15.8 ml of. 90M phosphoric acid​ is 0.22 M.

The balanced chemical equation for the reaction between calcium hydroxide and phosphoric acid is:

Ca(OH)₂ + H₃PO₄ → Ca₃(PO₄)₂ + 2H₂O

The molar ratio of calcium hydroxide to phosphoric acid is 1:3.

The volume of the phosphoric acid solution is 15.8 mL and the molarity of the phosphoric acid solution is 0.90 M.

Use the following equation to calculate the moles of phosphoric acid:

moles of H₃PO₄ = molarity × volume

moles of H₃PO₄ = 0.90 M × 15.8 mL

moles of H₃PO₄ = 14.22 mmol

Since the molar ratio of calcium hydroxide to phosphoric acid is 1:3, the moles of calcium hydroxide is 1/3 of the moles of phosphoric acid.

moles of Ca(OH)₂ = moles of H₃PO₄ / 3

moles of Ca(OH)₂ = 14.22 mmol / 3

moles of Ca(OH)₂ = 4.74 mmol

Use the following equation to calculate the molarity of calcium hydroxide:

molarity of Ca(OH)₂ = moles of Ca(OH)₂ / volume

molarity of Ca(OH)₂ = 4.74 mmol / 15 mL

molarity of Ca(OH)₂ = 0.28 M

Therefore, the molarity of calcium hydroxide is 0.22 M.

Find out more on molarity here: https://brainly.com/question/30404105

#SPJ1

The standard enthalpy change of the explosive reaction is -11408 kJ/mol.

The standard enthalpy change of the reaction can be calculated using the enthalpy of formation values of the reactants and products.

The enthalpy of the formation of ammonium nitrate (NH4NO3) is -393.5 kJ/mol, the enthalpy of the formation of the fuel oil (C10H22) is -249.7 kJ/mol, the enthalpy of the formation of oxygen (O2) is 0 kJ/mol.

The enthalpy of the formation of nitrogen (N2) is 0 kJ/mol, the enthalpy of the formation of water (H2O) is -285.8 kJ/mol, and the enthalpy of the formation of carbon dioxide (CO2) is -393.5 kJ/mol.

The equation for the explosive reaction is 3NH4NO3(s)+C10H22(l)+14O2(g)>3N2(g)+17H2O(g)+10CO2(g). Therefore, the standard enthalpy change of the reaction can be calculated using the following equation:

ΔH = [3(-393.5) + (-249.7) + (14*0) + (3*0) + (17*-285.8) + (10*-393.5)] - [3(-393.5) + (-249.7) + (14*0)]

ΔH = -11408 kJ/mol.

Therefore, the standard enthalpy change of the explosive reaction is -11408 kJ/mol.

For more questions like Enthalpy change click the link below:

https://brainly.com/question/29556033

#SPJ4

The complete question is attached below.

The bond and the force present between molecules is called intermolecular force. A hydrogen bond is present between the stearic acid and a water molecule.

Hydrogen bonds are the intermolecular force that forms a dipole-dipole interaction with an electronegative atom in the presence of the lone pair of electrons.

In stearic acid, \(\rm C_{18}H_{36}O_{2}\), hydrogen bonding exists between the oxygen and the hydrogen atom of the molecule.

Therefore, a hydrogen bond is present between stearic acid and the water molecule.

Learn more about intermolecular force here:

https://brainly.com/question/25359736