Octane (C8H18) is found in gasoline. It is burned for fuel in a combustion
reaction. The unbalanced combustion reaction for octane is shown below.
C8h18+ O2 → C02 + H2O + heat
When the reaction is balanced, how many carbon dioxide molecules are
produced for every octane molecule burned?

Answer:  Ratio : 4, 3, 4, 3 are the answers.

Explanation:

Answer: The quantity of heat required is 358.644 J.

Explanation:

Given: Specific heat capacity = [tex]4.18 J/g^{o}C[/tex]

Mass = 1.50 g

[tex]T_{1} = 26.5^{o}C[/tex]

[tex]T_{2} = 83.7^{o}C[/tex]

Formula used to calculate heat energy is as follows.

[tex]q = m \times C \times (T_{2} - T_{1})[/tex]

where,

q = heat energy

m = mass

C = specific heat capacity

[tex]T_{1}[/tex] = initial temperature

[tex]T_{2}[/tex] = final temperature

Substitute the values into above formula as follows.

[tex]q = m \times C \times (T_{2} - T_{1})\\= 1.50 \times 4.18 J/g^{o}C \times (83.7 - 26.5)^{o}C\\= 358.644 J[/tex]

Thus, we can conclude that quantity of heat required is 358.644 J.

Answer:

see picture below

Explanation:

The mechanism is in the following picture.

In the first step, the lone pair of oxygen (from the OH) as it's a strong activating group in the molecule, will go to the ring. This will cause that the double bond of the ring of the ortho position, attacks as nucleophyle to the Br2, causing the breaking of the bond.

In the second step, the bromine ion substract the hydrogen from the ortho position, and then, by resonance, the pair of electrons returns to the oxygen of the phenol.

Answer:

Option D, Calcium and Aluminum levels

Explanation:

The coal fired power plant releases huge amount of particulate and gaseous emissions such as mercury, sulphur dioxide, nitrogen oxide etc. When there is rain, these gaseous and particulate matter comes to the ground along with rain water and pollute the soil. There are also chances of acid rain due to the presence of sulphur dioxide. Polluted soil and acid rain negatively impact the growth of the plants and causes leaching of Aluminium thereby decreasing the availability of calcium for the plants. Thus, the trees die. Hence, if the amount of Aluminium and Calcium in soil is determined, one can easily deduce the cause of death of trees.

Hence, option D is correct

Answer:

Explanation:

It's 8

The population likely to increase as a result is otter.

Option B is correct.

Population is described as  the term typically used to refer to the number of people in a single area.

When the yellow perch population decreases, there is a decrease in predation pressure on the otter  population which means that there are fewer yellow perch preying on the otters, which could lead to an increase in the otter population.

An organism population is described by characteristics that include: population size and the population density.

Learn more about population at:

https://brainly.com/question/29885712

#SPJ1

Answer:

yes it is true

Explanation:

evaporation occurs when burning liquid water changes into gas.

Answer:

Finally, coagulation occurs and reinforces the platelet plug with threads of fibrin which are like a molecular binding agent. The hemostasis stage of wound healing happens very quickly.

Explanation:

Hope it helps u

FOLLOW MY ACCOUNT PLS PLS

Answer:

(C) NO2 has covalent bonds.

Answer:

55.9 g KCl.

Explanation:

Hello there!

In this case, according to the definition of molality for the 0.500-molar solution, we need to divide the moles of solute (potassium chloride) over the kilograms of solvent as shown below:

[tex]m=\frac{mol}{kilograms}[/tex]

Thus, solving for the moles of solute, we obtain:

[tex]mol=m*kilograms[/tex]

Since the density of water is 1 kg/L, we obtain the following moles:

[tex]mol=0.500mol/kg*1.50kg\\\\mol=0.75mol[/tex]

Next, since the molar mass of KCl is 74.5513 g/mol, the mass would be:

[tex]0.75mol*\frac{74.5513g}{1mol}\\\\55.9g \ KCl[/tex]

Regards!

Answer:

not a mineral but is a “mineraloid

Explanation:

not mineral

Explanation: its an element but it is not a mineral

Answer:

A

Explanation:

Reactants are on the right side of the chemical reaction

In order to balance the chemical equation, the coefficient of Na should be 2.

Answer: It depends equilibrium constant K

Explanation:   You need to to have reaction formula.

If K >> 1 then concentrations of products are much bigger than

concentrations of reactants. If K < < 1, concentration of products is small.

Answer:

0.068 moles of sodium hydroxide would have to be added to 150 mL of a 0.483 M acetic acid solution

Explanation:

As we know  

pH = pKa + log [salt]/[acid]

4.480= 4.74 + log [salt]/[acid]

log [salt]/[]acid] = -0.06

[salt]/[acid] = 0.87

moles acid = 0.150 L x 0.483 mol/L = 0.07245 moles acid

x/0.07245-x = 0.87

X- 0.07245 X = 0.87 *0.07245

X = 0.068 moles

Answer:

Ofc D. bc if the temp decreases, that means it is getting colder u dummy! But if it increases, it is getting warmer.

Explanation:

I got it right on USATestprep for using common sense, mark me the brainliest.

Answer: b because Potential energy is converted to kinetic energy as a stationary object begins to move.

Explanation:

Answer:

P(C₆H₆) = 0.2961 atm

Explanation:

I found an exercise pretty similar to this, so i'm gonna use the data of this exercise to show you how to do it, and then, replace your data in the procedure so you can have an accurate result:

"At a certain temperature the vapor pressure of pure benzene (C6H6) is measured to be 0.63 atm. Suppose a solution is prepared by mixing 79.2 g of benzene and 115. g of heptane (C7H16) Calculate the partial pressure of benzene vapor above this solution. Round your answer to 2 significant digits. Note for advanced students: you may assume the solution is ideal".

Now, according to the data, we want partial pressure of benzene, so we need to use Raoul's law which is:

P = Xₐ * P°    (1)

Where:

P: Partial pressure

Xₐ: molar fraction

P°: Vapour pressure

We only have the vapour pressure of benzene in the mixture. We need to determine the molar fraction first. To do this, we need the moles of each compound in the mixture.

To get the moles:   n = m / MM

To get the molar mass of benzene (C₆H₆) and heptane (C₇H₁₆), we need the atomic weights of Carbon and hydrogen, which are 12 g/mol and 1 g/mol:

MM(C₆H₆) = (12*6) + (6*1) = 78 g/mol

MM(C₇H₁₆) = (7*12) + (16*1) = 100 g/mol

Let's determine the moles of each compound:

moles (C₆H₆) = 79.2 / 78 = 1.02 moles

moles (C₇H₁₆) = 115 / 100 = 1.15 moles

moles in solution = 1.02 + 1.15 = 2.17 moles

To get the molar fractions, we use the following expression:

Xₐ = moles(C₆H₆) / moles in solution

Xₐ = 1.02 / 2.17 = 0.47

Finally, the partial pressure is:

P(C₆H₆) = 0.47 * 0.63

Hope this helps

The crust + upper mantle is called the lithosphere.

Answer:

Explanation:

fdcdf

Answer:

10.22g

Explanation:

Using the formula as follows:

Q = m × c × ∆T

Where;

Q = amount of heat required (J)

m = mass of substance (g)

c = specific heat of substance (J/g°C)

∆T = change in temperature (°C)

According to the information given in this question;

Q = 341J

m = ?

∆T = 55.0ºC - 18.0ºC = 37°C

c of aluminum = 0.902J/g°C

Using Q = m × c × ∆T

341 = m × 0.902 × 37

341 = 33.374m

m = 341 ÷ 33.374

m = 10.22g

Answer:

Scavengers

Explanation:

Check G the answer is up theree

Answer:

This question is incomplete, however, it is asking to calculate the empirical formula of the compound.

The empirical formula is N2O3

Explanation:

The following information about a compound was got from the question:

N = 36.8%

O = 63.2%

It can be said that the compound contains 36.8g of nitrogen (N) and 63.2g of oxygen (O).

Next, we convert each mass composition to moles by dividing by their respective molar masses.

N = 36.8g ÷ 14g/mol = 2.628mol

O = 63.2g ÷ 16g/mol = 3.95mol

Next, we divide each mole value by the smallest value (2.628mol).

N = 2.628mol ÷ 2.628 = 1

O = 3.95mol ÷ 2.628 = 1.5

We multiply each value by 2 to get a empirical ratio.

N = 2

O = 3

The ratio of N:O is 2:3, hence, the empirical formula is N2O3.

Answer:

[tex]\Delta T_{w}=-0.715\°C[/tex]

Explanation:

Hello there!

In this case, according to the given information, it is possible to realize that the heat relationship between iron and water is given by:

[tex]-Q_{Fe}=Q_{w}[/tex]

Which in terms of mass, specific heat and temperature is:

[tex]-m_{Fe}C_{Fe}\Delta T_{Fe}=m_{w}C_{w}\Delta T_{w}[/tex]

Thus, by solving for the change in the temperature of water we will obtain:

[tex]\Delta T_{w}=\frac{-m_{Fe}C_{Fe}\Delta T_{Fe}}{m_{w}C_{w}} \\\\\Delta T_{w}=\frac{-200.0g*0.449\frac{J}{g\°C} 50.0\°C}{1500.0g4.184\frac{J}{g\°C}} \\\\\Delta T_{w}=-0.715\°C[/tex]

Which is negative because iron increases its temperature and therefore water decreases it.

Regards!

Answer:

64.7g

Explanation:

The balanced chemical equation of this question is as follows;

AlI + HgCl2 → HgI + AlCl2

Based on the above equation, 1 mole of AlI (aluminum monoiodide) reacts to produce 1 mole of HgI (mercury iodide).

Using mole = mass/molar mass to convert mass of HgI to moles.

Molar mass of HgI = 200.59 + 127

= 327.59g/mol

Mole = 138/327.59

= 0.42mol

- If 1 mole of AlI (aluminum monoiodide) reacts to produce 1 mole of HgI (mercury iodide)

- Then 0.42 mol of HgI will be produced by 0.42mol of AlI.

Using mole = mass/molar mass

Mass = mole × molar mass

Molar mass of AlI = 27 + 127

= 154g/mol

Mass of AlI = 0.42 × 154

= 64.7g of AlI

Answer:

h2

Explanation:

Answer:

(1) Income Associated with the Production Process

(a) Compensation of employees

(b) Taxes and subsidies on products and

production .

(2) Property Income

(a) Investment income:

• Dividends and withdrawals from income of

quasi-corporations

• Reinvested earnings

• Interest

(b) Rent .

I hope this is correct :-)