when a hydrocarbon burns, water is produced as well as carbon dioxide. the density of gasoline is . assume gasoline to be represented by octane, c8h18, for which the combustion reaction is . calculate the mass of water produced from the combustion of 1.0 gallon (3.8 l) of gasoline

Answer:

131.293 u

Explanation:

Answer:

Hexanal, once commonly called caproic aldehyde, is a six-carbon straight-chain aldehyde. It is a clear liquid with an atmospheric-pressure boiling point of 131 ºC

Answer:

the answer is B the biggest one

Explanation:

The sodium-potassium pump does not run out of ions since ion exchange is essential for the action potential to take place and to maintain homeostasis.

The cell has variable concentrations of different substances compared to the environment that surrounds it, with significant differences with sodium and potassium.

Therefore, we can conclude that the sodium potassium pump produces an exchange of potassium ions for sodium ions which keeps the cellular system functioning properly.

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The molar mass of the gas can be calculated using the ideal gas law. Given that the gas occupies a volume of 12.620L at a pressure of 92.5kPa and a temperature of 42.6°C, and knowing the mass of the gas is 19.08g, the molar mass can be determined.

To calculate the molar mass, we need to convert the temperature from Celsius to Kelvin by adding 273.15. So, the temperature becomes 42.6°C + 273.15 = 315.75K. We can then rearrange the ideal gas law equation PV = nRT to solve for the molar mass (M):

M = (mRT) / (PV)

where:

m = mass of the gas (19.08g)

R = ideal gas constant (8.314 J/(mol·K))

T = temperature in Kelvin (315.75K)

P = pressure (92.5kPa)

V = volume (12.620L)

Substituting the values into the equation:

M = (19.08g * 8.314 J/(mol·K) * 315.75K) / (92.5kPa * 12.620L)

After performing the calculations, the molar mass of the gas is found to be approximately 31.43 g/mol.

In summary, the molar mass of the gas is calculated using the ideal gas law equation by plugging in the known values for pressure, volume, temperature, and mass of the gas. By rearranging the equation and performing the necessary calculations, we find that the molar mass of the gas is approximately 31.43 g/mol.

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Answer: 25.0 L

Explanation:

For this problem, we will need to use Boyle's Law.

Boyle's Law: P₁V₁=P₂V₂

Since we are looking for V₂, we can rewrite the equation.

V₂=P₁V₁/P₂

The pressure should be in atm, so let's convert kPa to atm.

P₁=100 kPa=0.99 atm

P₂=200 kPa=1.97 atm

Now that we know the pressure in atm, we can plug it into the equation and solve.

\(V_{2} =\frac{(0.99 atm)(50.0L)}{1.97atm}\)

\(V_{2} =25.0 L\)

Answer:

B ~ transmission on edge 2020

Explanation:

transmission: the passing of a wave through an object

The process which is occurring when a light wave goes through a pane of glass in a window is transmission.

Transmission is a process in which light can travel from any object without any deviation and distraction.

So when a light wave is going through a pane of a glass mirror which is present in window then it will transmit from the glass.

Hence the process which occur is transmission.

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Furan is an aromatic compound because it has a cyclic conjugated structure that allows the molecule to delocalize its electrons.

This delocalization gives the molecule a stable structure and makes it highly resistant to chemical reactions.

An aromatic compound is a type of organic compound that contains a ring of atoms with alternating single and double bonds. This ring is made up of carbon and hydrogen atoms and is held together by a special type of strong bond called a pi bond. Aromatic compounds are usually aromatic in nature, meaning they have a pleasant smell. Examples of aromatic compounds include benzene, toluene, and xylene.

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a. If the initial HI concentration was 0.250 mol/l, the concentration of HI at 25 minutes is 0.007 M.

b. The decomposition of hydrogen iodide will take 2083.33 seconds for all of the 0.250 MHI to decompose.

Thus, the correct answera are

a. 0.007 M

b. 2083.33 seconds.

А reаction is referred to аs decomposition while which а given chemicаl breаks аnd forms more thаn one sub-compound or simple pаrts. For exаmple, when wаter breаks then it forms oxygen аnd hydrogen (here the reаction of the breаkdown of wаter is а decomposition reаction).

Since we hаve а zero-order reаction, we cаn determine the reаction constаnt through rаte lаw:

rate = K = 1.20 × \(10^{-4}\) mol/\(Ls^{-1}\)

a. Calculating the concentration of HI at 25 minutes

[HI] = -Kt + \([HI]_{0}\)

[HI] = -1.20 × \(10^{-4}\) mol/\(Ls^{-1}\) × 1500 s + 0.250 M

[HI] = 0.007 M

Thus, the concentration of HI at 25 minutes is 0.007 M.

b. Calculating the time required for 0.250 MHI to decompose:

t = \(\frac{[HI]}{K}\)

t = \(\frac{0.250}{1.20 (10^{-4}mol/Ls^{-1})  }\)

t = 2083.388 seconds

Thus, it will take 2083.33 seconds for all of the 0.250 MHI to decompose.

Your question is incomplete, but most probably your full question can be seen in the Attachment.

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This balanced redox reaction involves the transfer of electrons from Fe (s) to MnO4- (aq), resulting in the formation of Mn2+ (aq) and Fe3+ (aq) ions

The half-reaction occurring at the anode in the balanced reaction shown is the oxidation half-reaction, where electrons are lost. In this case, the anode is where Fe (s) is located. Therefore, the half-reaction at the anode is the oxidation of Fe (s) to Fe3+ (aq), which is represented as follows:

Fe (s) → Fe3+ (aq) + 3e-

This half-reaction involves the loss of electrons by Fe (s), resulting in the formation of Fe3+ (aq) ions. The electrons released in this half-reaction are then transferred through the external circuit to the cathode, where reduction occurs. Overall, this balanced redox reaction involves the transfer of electrons from Fe (s) to MnO4- (aq), resulting in the formation of Mn2+ (aq) and Fe3+ (aq) ions.

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Answer:

A heterogeneous mixture is simply any mixture that is not uniform in composition - it's a non-uniform mixture of smaller constituent parts. By contrast, a mixture that is uniform in composition is a homogeneous mixture.

Option A is correct way of representation of electronic configuration.

The answers to the given problem are monthly energy use of household in m3 of natural gas equivalent = 787.5 m³, Monthly energy use of household in kg of oil equivalent = 0.29484627 ktoe, CO2 footprint of household in kg = 1500 kgCO2 (1.5 metric tonnes of CO2).

1) Calculation of monthly energy use in m3 of natural gas equivalent:For every 1 kWh of electricity produced, the gas turbines consume 0.21 m³ of natural gas equivalent.

The consumption of natural gas equivalent can be calculated by multiplying the monthly average electric energy consumption by the quantity of natural gas equivalent that is consumed by gas turbines for every 1 kWh of electricity produced.

So, the monthly consumption of natural gas equivalent will be,

3750 kWh * 0.21 m³/kWh = 787.5 m³ of natural gas equivalent

Calculation of monthly energy use in kg of oil equivalent:

Assuming that natural gas has a calorific value of 55.5 MJ/m³, and that the conversion efficiency of natural gas turbine is 33%, the equivalent energy that will be produced from 1 m³ of natural gas is 55.5 x 0.33 = 18.315 MJ/m³.

In order to calculate the equivalent energy that will be produced from 787.5 m³ of natural gas, we can use the formula:

Equivalent energy = calorific value of natural gas x volume of natural gas x conversion efficiency

So, the equivalent energy that will be produced from 787.5 m³ of natural gas is,

Equivalent energy = 55.5 x 787.5 x 0.33

= 12337.3125 MJ

= 12.337 GJ

So, the monthly consumption of oil equivalent will be:

12.337 GJ / 41.868 = 0.29484627 ktoe (kilo tonnes of oil equivalent)

2) Calculation of CO2 footprint in kg:

Assuming the average CO2 emissions coefficient for gas fired power plants is 400 g/kWh.

The CO2 footprint in kg can be calculated by multiplying the monthly average electric energy consumption by the CO2 emissions coefficient of gas-fired power plants.

So, the CO2 footprint in kg will be:

3750 kWh x 0.4 kg/kWh = 1500 kgCO2 (i.e., 1.5 metric tonnes of CO2).

Therefore, the answers to the given problem are:

Monthly energy use of household in m3 of natural gas equivalent = 787.5 m³

Monthly energy use of household in kg of oil equivalent = 0.29484627 ktoe

CO2 footprint of household in kg = 1500 kgCO2 (1.5 metric tonnes of CO2).

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Answer:

a drought !

- little to no water causes it

- it causes for organisms to die and organisms need water !

[HCHO₂] < [NaCHO₂]. This means that there are more NaCHO₂molecules present in the solution than HCHO₂ molecules, making option b the correct answer.

This is because when the pH of the solution is lower than the pKa of the weak acid (in this case, HCHO₂), the acid is in its protonated form (HCHO₂) and the conjugate base (NaCHO₂) is in its deprotonated form.

The formula "The molarity of products is divided by the molarity of reactants" is used to calculate the equilibrium constant of a process.

The equilibrium constant would be the ratio of the product concentration to the reactant concentration.

The amount of a solute per unit volume of solution, or the concentration of a chemical entity in a particular form of solution, has been determined by its molar concentration.

The formula "The molarity of products is divided by the molarity of reactants" is used to calculate the equilibrium constant of a process.
Additionally, it is possible to make a buffer from HCHO₂ and NaCHO₂ at this pH, as long as the ratio of the two is appropriate. The buffer capacity would be highest when the concentrations of HCHO₂ and NaCHO₂ are equal, making option e also a correct statement.

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The maximum percent recovery for acetanilide can be calculated using the formula:

% recovery = (actual yield / theoretical yield) * 100%

The theoretical yield is the maximum amount of acetanilide that can be obtained from the recrystallization, assuming complete recovery of all the solute.

The actual yield is the amount of acetanilide that is actually obtained from the recrystallization.

Since the solubility of acetanilide in water increases with temperature, we can assume that all 5.0 g of acetanilide will dissolve when the water is heated to boiling.

When the solution cools, some of the acetanilide will recrystallize out of the solution, while the rest will remain in solution.

Assuming that all of the acetanilide in the solution recrystallizes out, the theoretical yield would be 5.0 g.

However, since some acetanilide may remain in solution or be lost during filtration, we cannot assume that the actual yield will be equal to the theoretical yield.

Therefore, the maximum percent recovery cannot be calculated without knowing the actual yield of acetanilide obtained from the recrystallization.

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Answer:

1,110.48 mL

Explanation:

37°C is 310K and 132°C is 405K

V/V' = T/T'

850/V' = 310/405

V' = (850×405)/310

=> V' = 1110.48 mL

Answer:i

i believe its contraction but i might be wrong

Explanation:

Answer:

It might be expansion, sorry if it's wrong.

Answer:

the tempeture increases

Explanation:

Zn(s) + CuSO4(aq) � ZnSO4(aq) + Cu(s) An important aspect of these experiments is that they are exothermic.

Answer:

1- gram of oxygen, 2- 3.01x1023 atoms of oxygen, 3- 1 molecule of oxygen, 4- 1mole of oxygen, 5- 1atom of oxygen.

The mole fraction of solute in a 3.61 m aqueous solution is 0.0616.

The mole fraction of solute in a 3.61 m aqueous solution can be calculated using the following formula;

Mole fraction of solute = moles of solute / (moles of solute + moles of solvent)

Formula used: Molarity = Moles of solute/ Volume of solution in liters.

We are given;Molarity (M) = 3.61 molarity (m)

To find:Mole fraction of solute (X2)

Mole fraction of solvent (X1)In order to find the moles of solute, we need to know the volume of the solution.

Let's assume that the volume of the solution is 1 liter.

Molarity = Moles of solute/ Volume of solution in liters3.61 M = Moles of solute / 1 liter

Moles of solute = 3.61 moles.

Now we need to calculate the moles of solvent.

The solvent is water and it has a molar mass of 18 g/mol.

Let's assume the volume of the solution is 1 liter.

The density of water is 1 g/mL.

Therefore, the mass of 1 liter of water is 1000 g.1 mole of water = 18 g.

Therefore, the number of moles of water is 1000 g/18 g = 55.56 moles.

Moles of solvent = 55.56 moles

Mole fraction of solute = Moles of solute / (Moles of solute + Moles of solvent)

                             = 3.61 / (3.61 + 55.56)= 0.0616

The mole fraction of solute in a 3.61 m aqueous solution is 0.0616..

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Answer:

Liquid and gas is the matter that takes shape of a container

It can also be called fluid since fluid is distributed into liquid and gas

Explanation:

I hope that is enough for your answer, hope this will help

For every mole of NaN3 that is broken down, one mole of N2(g) is produced. Using the molar mass of NaN3, which is 68.99 g/mol, we can determine how many moles of NaN3 are present given that we have 50.0 g of the substance.

We get 0.724 mol of NaN3 by dividing 50.0 g by 68.99 g/mol. We can determine that 0.724 mol of NaN3 will result in 0.724 mol of N2(g) since 1 mole of NaN3 yields 1 mole of N2(g). We may use the molar mass of N2(g), which is 28.02 g/mol, to determine the mass of N2(g) produced.

0.724 mol is multiplied by 28.02 g/mol to yield 20.3 g of N2(g). Therefore, 20.3 g of N2(g) will be created from 50.0 g of NaN3.

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Answer:

true

Explanation:

Now, we can plug in the values for [A-] and [HA] into the Henderson-Hasselbalch equation: pH = 3.82 + log(0.15/0.30) pH = 3.52 (long answer)

To find the pH of a buffer prepared with 0.30 M H2S and 0.15 M HS−, we need to use the Henderson-Hasselbalch equation:
pH = pKa + log([A-]/[HA])
where pKa is the acid dissociation constant, [A-] is the concentration of the conjugate base (HS−), and [HA] is the concentration of the acid (H2S).
First, we need to find the pKa of hydrosulfuric acid (H2S) using the given Ka value:
Ka = [H3O+][HS−]/[H2S]
9.1 × 10-8 = x^2/0.30
x = [H3O+] = [HS−] = 1.51 × 10-4 M
pH = -log[H3O+] = 3.82

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Answer: False

Explanation:

false

The change described in the process of reconstituting frozen orange juice is a physical change. A physical change refers to a transformation that affects one or more physical properties of a substance, such as its size, shape, or state, without altering its chemical composition.

Adding water to frozen orange juice to reconstitute it causes a change in its volume, but it does not create new substances or cause a chemical reaction. Therefore, it is considered a physical change. Other examples of physical changes include cutting an apple, melting ice, and boiling water.

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Answer:

–2400 N

Explanation:

This is a physics question. However, the answer to the question is given below.

We'll begin by converting 36 Km/hr to m/s. This can be obtained as follow:

3.6 Km/hr = 1 m/s

Therefore,

36 Km/hr = 36 Km/hr × 1 m/s / 3.6 km/hr

36 Km/hr = 10 m/s

Thus, 36 Km/hr is equivalent 10 m/s.

Next, we shall determine the acceleration of the car. This can be obtained as follow:

Initial velocity (u) = 10 m/s

Final velocity (v) = 0 m/s

Time (t) = 5 s

Acceleration (a) =?

a = (v – u) / t

a = (0 – 10) / 5

a = – 10 / 5

a = –2 m/s²

Finally, we shall determine the force required to stop the car. This can be obtained as follow:

Mass (m) = 1200 Kg

Acceleration (a) = –2 m/s²

Force (F) =?

F = ma

F = 1200 × –2

F = –2400 N

NOTE: The negative sign indicate that the force is in opposite direction to the motion of the car.