1. The octane present in gasoline burns according to the following equation:

2 C8H18 + 25 O2 → 16 CO2 + 18 H2O

(a) How many moles of O2 are needed to react fully with 27.5 moles of octane?

Answers

Answer 1

Answer:

[tex]n_{O_2}=343.75molO_2[/tex]

Explanation:

Hello there!

In this case, according to the combustion of octane:

[tex]2C_8H_1_8+25O_2\rightarrow 16CO_2+18H_2O[/tex]

We can see there is a 2:25 mole ratio of octane to oxygen; therefore, we can calculate the moles of oxygen via the following stoichiometric factor:

[tex]n_{O_2}=27.5molC_8H_1_8*\frac{25molO_2}{2molC_8H_1_8} \\\\n_{O_2}=343.75molO_2[/tex]

Best regards!


Related Questions

How many moles of solute are in 53.1 mL of 12.5M HCI?

Answers

Molarity = moles of solute/volume of solution in liters.

From this relation, we can figure out the number of moles of solute by multiplying the molarity of the solution by the volume in liters.

We have 53.1 mL, or 0.0531 L, of a 12.5 M, or 12.5 mol/L, solution. Multiplying 12.5 mol/L by 0.0531 L, we obtain 0.664 moles. So, in this volume of solution, there are 0.664 moles of solute (HCl).

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Classify the following alcohol as primary,
secondary or tertiary.
OH
A. primary
B. secondary
C. tertiary

Answers

Answer:

The correct answer is C, tertiary.

The following alcohol is a tertiary alcohol. Hence, option C is correct.

What is primary alcohol?

A primary alcohol is a compound in which a hydroxy group, ‒OH, is attached to a saturated carbon atom which has either three hydrogen atoms attached to it or only one other carbon atom and two hydrogen atoms attached to it.

Here, the carbon atom holding the OH group is attached directly to three alkyl groups.

Hence, the following alcohol is a tertiary alcohol.

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James made a poster showing the two body systems that regulate a person's pulse. Which two systems did james represent on his poster? F nervous and circulatory G resiratoty and endocrine systems H circular and digestive system I digestive and nervous system

Answers

Answer:

F

Explanation:

Provide a balanced molecular equation, total ionic, and net ionic equation for sodium phosphate and zinc acetate.

Answers

Answer: Balanced molecular equation :

[tex]2Na_3PO_4(aq)+3(CH_3COO)_2Zn(aq)\rightarrow 6CH_3COONa(aq)+Zn_3(PO_4)_2(s)[/tex]

Total ionic equation:

[tex]6Na^+(aq)+3PO_4^{2-}(aq)+6CH_3COO^-(aq)+3Zn^{2+}(aq)\rightarrow 6CH_3COO^-(aq)+6Na^+(aq)+Zn_3(PO_4)_2(s)[/tex]  

The net ionic equation:

[tex]2PO_4^{3-}(aq)+3Zn^{2+}(aq)\rightarrow Zn_3(PO_4)_2(s)[/tex]

Explanation:

Complete ionic equation : In complete ionic equation, all the substances that are strong electrolyte are present in an aqueous state as ions.

Net ionic equation : In the net ionic equations, we are not include the spectator ions in the equations.

Spectator ions : The ions present on reactant and product side which do not participate in a reactions. The same ions present on both the sides.

When sodium phosphate and zinc acetate then it gives zinc phosphate and sodium acetate as  product.

The balanced molecular equation will be,

[tex]2Na_3PO_4(aq)+3(CH_3COO)_2Zn(aq)\rightarrow 6CH_3COONa(aq)+Zn_3(PO_4)_2(s)[/tex]

The total ionic equation in separated aqueous solution will be,

[tex]6Na^+(aq)+2PO_4^{3-}(aq)+6CH_3COO^-(aq)+3Zn^{2+}(aq)\rightarrow 6CH_3COO^-(aq)+6Na^+(aq)+Zn_3(PO_4)_2(s)[/tex]

In this equation, and  are the spectator ions.

By removing the spectator ions from the balanced ionic equation, we get the net ionic equation.

The net ionic equation will be,

[tex]2PO_4^{3-}(aq)+3Zn^{2+}(aq)\rightarrow Zn_3(PO_4)_2(s)[/tex]

Calculate the number of copper atoms in a 63.55 g
sample of copper.​

Answers

Answer:

there are N_A, "Avogadro's number" of copper atoms in a 63.55*g mass of copper wire. And N_A, "Avogadro's number" = 6.022xx10^23 individual copper atoms. I look on the Periodic Table, and at Z=29, i.e. copper, the quoted atomic mass is 63.55*g.

Explanation:

One mole of every substance contains 6.022×10²³ atoms. The atomic mass of copper is 63.55 g. Thus it is one mole of copper which contains copper 6.022×10²³ atoms.

What is copper?

Copper is 29th element in periodic table. It is a transition metal classified into d-block. Transition metals are named so because they in between the metals and non-metals in periodic table.

Transition metals have varying oxidation state. Copper exists in +1, +2 and +3 oxidation states.

Any substance containing 6.022×10²³ atoms is called one mole of that substance. This number is called Avogadro number. Hence one mole of each element contains avogadro number of its atoms.

Similarly one mole of each compound contains 6.022×10²³ number of molecules. Here, the atomic mass of copper is 63.55 g. That is one mole of copper weighs 63.55 g. Hence, number of atoms in 63.55 g of copper is 6.022×10²³ atoms.

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The electric field around a positive charge will:

Answers

The electric field of a positively charged particle points radially away from the charge.

What chemical test to differentiate propane and propene

Answers

Answer:

If you add bromine water, an aqueous solution of bromine, to the test tubes, you can tell which is propene, the alkene. The bromine reacts with and saturates the double bonds in alkenes, and so decolourises.

please give brainly

Using bromine water..the bromine will react with double bond in propene so it will decolourise the bromine water

How many moles would be present in a gas contained in a 100.0 mL vessel at 25.0oC at a pressure of 2.50 atm?

Answers

Answer:

n = 0.0102 mol.

Explanation:

Hello there!

In this case, according to the ideal gas law, which allows us to set up a relationship among volume, pressure, temperature and moles, we can define it as:

[tex]PV=nRT[/tex]

Thus, given the volume in liters (0.1000 L), temperature in kelvins (298.15 K) and pressure in atmospheres (2.50 atm), we can solve for moles as shown below:

[tex]n=\frac{PV}{RT}[/tex]

Thereafter, we plug in the aforementioned values to obtain:

[tex]n=\frac{2.50atm*0.1000L}{0.08206\frac{atm*L}{mol*K}*298.15K}\\\\n=0.0102mol[/tex]

Best regards!

A solution has a
pH of 2.5.
Answer the following questions.
pOH =
[H]=
[OH]=

Answers

Answer:

pOH = 11.5

[H⁺] = 0.003 M

[OH⁻] = 3 × 10⁻¹² M

Explanation:

The computation is shown below:

Given that

pH = 2.5

Based on the above information

We know that

pH + pOH = 14  ⇒  pOH = 14 - pH

pOH = 14 - 2.5

pOH = 11.5

[H⁺] = 10^(-pH) = 10^(-2.5)

[H⁺] = 0.003 M

[OH⁻] = 10^(-pOH)

= 10^(-11.5)

= 3 × 10⁻¹² M

[OH⁻] = 3 × 10⁻¹² M

Hence, the above represents the answer

plz, help me I'm so confused!

(this is also science)

Answers

Answer:

Well, there is no photo...

Explanation:

PLEASE HELP
How many chlorine atoms are needed to satisfy the octet rule when forming an ionic compound with a cation of charge 3+?

Answers

Answer:

not the right answer but I need this for the answer the question thing

3 chlorine atoms are needed to satisfy the octet rule when forming an ionic compound with a cation of 3+ charge.

Sally rides her bike to the store to get some Skittles. The store is 5 km
away. If it takes her 10 minutes to get to the store what is her average
speed?

0.5 km/hr
0.5 mph
0.5 km/min
5 km/min

Answers

Answer:

Sally's average speed is 0.5 km/min

Explanation:

speed=distance/time

so, 5km/10min=0.5 km/min

how many grams are in 6.8L of Oxygen gas (O2) at STP

Answers

Answer:

9.7 g

Explanation:

From the question,

Note: The molar volume of all gas at stp is 22.4 dm³ or 22.4 L

1 mol of  oxygen gas (O₂) at stp = 22.4 dm³

X mole of oxygen gas (O₂) at stp = 6.8 L

X = (1 mol×6.8 L)/22.4 L

X = 0.3036 mol.

But,

Number of mole (n) = mass (m)/molar mass (m')

n = m/m'

m = n×m'.................. Equation 2

Where n = 0.3036 mol, m' = 32 g/mol

Substitute into equation 2

m = 0.3036×32

m = 9.7 g

Convert 6.62 X 10^23 atoms to moles

Answers

Answer:

1.099

Explanation:

Hope this helps

Answer:

1.09944660051578e-23

Explanation:

Meat-eating animals are:

decomposers
second-order consumers
producers
first-order consumers
HELP

Answers

Answer:

decomposers

Explanation:

Is carbonic acid (H2CO3) soluble in water?

Answers

Answer:

it is soluble in water

Explanation:

mark brainliest pliiz cutee:)

Yes it is soluble in water

how many liters of 0.150 m hcl would be required to react completely with 8.00 grams of magnesium hydroxide

Answers

Answer:

how many liters of 0.150 m hcl would be required to react completely with 8.00 grams of magnesium hydroxide

Explanation:

please give me brainlist and follow

I have to make question longer this question
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Do you breathe air?

Answers

Answer:

Of course I breathe air.

Explanation:

I'm not a fish.

Answer:

[tex]ummmmmmm \: yes \: [/tex]

The following substances dissolve when added to water. Classify the substances according to the strongest solute-solvent interaction that will occur between the given substances and water during dissolution. Drag the appropriate items to their respective bins. Not all bins may contain an item and some bins may contain multiple items.NH3 AlBr3 CH3OH AlCl

Answers

Answer:

NH3 ------dipole - dipole forces

CH3OH ------ dipole - dipole forces

AlBr3 ------- ion - dipole forces

AlCl3 ------- ion - dipole forces

Explanation:

Let us recall that water is a polar molecule. This means that water has a positive as well as a negative end. NH3 also has a dipole. The interaction between solute and solvent dipoles leads to the dissolution of NH3 in water. Hence the strongest intermolecular force here is dipole - dipole forces.

Similarly, CH3OH  possesses a polar -O-H group which can interact with water via dipole - dipole interaction as its strongest intermolecular force.

As for AlBr3 and AlCl3, the two substances dissociate into ions in solution and these ions interact with the dipole in water via ion - dipole interaction as its strongest intermolecular interaction.

Answer:

Dipole -dipole forces :

Ammonia [tex]NH_3[/tex]

Aluminium Chloride [tex]AlCl[/tex]

Methanol [tex]CH_3OH[/tex]

Ion dipole forces :

Aluminium bromide [tex]AlBr_3[/tex]

Explanation:

Because water is not in ionic form it can only forms dipole forces which are strongest. Methanol, Ammonia and AlCl are also dipoles not ions . Thus dipole dipole forces exist.

On the other hand, aluminium bromide are ionic and it can forms ion dipole bonds with water.

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How is gravity an attractive force?

Answers

Gravitational force -an attractive force that exists between all objects with mass; an object with mass attracts another object with mass; the magnitude of the force is directly proportional to the masses of the two objects and inversely proportional to the square of the distance between the two objects.
an attractive force that exists between all objects with mass Because mass is always positive. There are different notions of mass, but they're equivalent. ... The masses in Newton's law of gravitation, F=Gm1m2r2, are gravitational masses.

what do protons determine about an element

Answers

The number of protons in an atoms determines the atoms identity. Electrons determine the electrical charge.

Answer:

The number of protons in one atom of an element determines the atom's identity, and the number of electrons determines its electrical charge. The atomic number tells you the number of protons in one atom of an element. It also tells you the number of electrons in a neutral atom of that element.

Explanation:

Explain why a city that receives 10 hours more light each day has colder average temperatures. Explain

Answers

Explanation:

This would be similar to how the poles work in the North and South. Due to their placement, they recieve much more sun light than the rest of the Earth since we rotate horizontally. However, their placement also makes them farther from the sun than the rest of Earth, therefore not receiving as much heat.

There are 3 gases in a container, methane has a partial pressure of 1.23 atm, ethane's partial pressure is 1.48 atm and an unknown pressure of propane. The pressure in the container was measure to be 4.43 atm. What is the partial pressure of propane?

A) 1.72
B) 1.35
C) 1.69
D) 1.53

Answers

Answer:

A) 1.72 atm

Explanation:

Dalton's Law of Partial Pressures

[tex]P_{t} = P_{1} + P_{2} + P_{3} ....[/tex]

4.43 atm = 1.23 atm + 1.48 atm + x

x = 4.43 atm - (1.23 atm + 1.48 atm)

x = 1.72 atm

If a sample of oxygen gas has a pressure of 810 torr at 298 K, what will be its pressure if its temperature is raised to 330K?

Answers

Answer:

The pressure is = 897 torr

Explanation:

We use Gay Lussac's Law.

17. The equation below represents a chemical reaction that occurs in living cells.
CoH1206 + 602 -- 6002 + 6H20 + energy
How many atoms are represented in the reactants of this equation?

Answers

Answer:

36 atoms

Explanation:

C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O + energy

The reactants are in the left side of the equation. First we determine how many atoms are there in the C₆H₁₂O₆ molecule:

6 C atoms + 12 H atoms + 6 O atoms = 24 atoms in total

There are two atoms in a O₂ molecule, and there are 6 O₂ molecules in the equation:

2 * (6 O atoms) = 12 atoms in total

The total number of atoms in the reactants is

24 + 12 = 36 atoms

1.1
Which of these is NOT an intermolecular force?
A
Covalent bonding
B
Hydrogen bonding
с
London / dispersion forces
Dipole - dipole forces
1.2
London forces are found between ...
A two polar molecules.
B two non-polar molecules.
C a polar molecule and a non-polar molecule.
Da polar molecule and an ionic substance.
(2
1.3 Which of the following compounds have a shape that can be described as
trigonal bipyramidal?
A
CH4
B
PCL5
с
SF6
D
BF3
(2)
1.4
Which of the following have the same molecular geometry?
CO2, H20, BeCl2 and N20
A
CO2, BeCl2 and N2O
B
H20 and N20 only
C
H20, BeCl2 and CO2
CO2 and N20 only
(2)​

Answers

Answer:

1.1) Covalent bonding

Explanation:

All of the above are intermolecular forces except covalent, which is intramolecular.

A dilute solution of hydrofluoric acid has a volume of 3.0 L and a molarity of 3.0
M. If the original solution had a volume of 2.0L, what was the initial molarity?

Answers

Answer:

4.5M

Explanation:

The solution was diluted from 2.0L to 3.0L, the dilution factor was:

3.0L / 2.0L = 1.5.

That means the solution was diluted 1.5 times.

As the final molarity of the diluted solution is 3.0M, the initial molarity of the solution was:

3.0M * 1.5 =

4.5M is the molarity of the original solution

What is the formula for sodium selenide?

Answers

The formula for sodium selenide is Na2Se

N2 + 3H2 → 2NH3
How many moles of hydrogen, H2, are needed to react with 3.5 moles of nitrogen, N2?

Answers

Answer:

10.5 got it!!!!

Sandy is conducting an investigation to find out which
food his dog likes best. Which is the dependent variable
in his investigation?
color of the
dog's dish
BROWN
amount of
food eaten
the type of
food given
PINK
LIGHT GREEN

Answers

Answer: Whats the question?

Amount of food eaten.
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Read the following excerpt from A Room of One's Own by Virginia Woolf:[A]ny woman born with a great gift in the sixteenth century would certainly have gone crazed, shot herself, or ended her days in some lonely cottage outside the village, half witch, half wizard, feared and mocked at. For it needs little skill in psychology to be sure that a happily gifted girl who had tried to use her gift for poetry would have been so thwarted and hindered by other people.Which statement best states the idea that this excerpt helps to develop?A. Historians have glossed over women's achievements.B. Emotions have prevented women from success.C. Men have conspired to keep women powerless.D. Society has held women back from greatness. Prepare summary journal entries to record the following transactions and events a through g for a company in its first month of operations.a. Raw materials purchased on account, $92,000. b. Direct materials used in production, $40,000. Indirect materials used in production, $25,000.c. Paid cash for factory payroll, $65,000. Of this total, $45,000 is for direct labor and $20,000 is for indirect labor. d. Paid cash for other actual overhead costs, $7,750. e. Applied overhead at the rate of 120% of direct labor cost. f. Transferred cost of jobs completed to finished goods, $69,000. g. Jobs that had a cost of $69,000 were sold. h. Sold jobs on account for $98,000. PLEASE HELP! ASAP I WILL GIVE BRAINLIESTThis table represents the monthly fees for checking accounts at two banks. Which statement is best supported by the information in the table?The fee at Sunset Bank will always be less than the fee at Oceanview Bank.The fee at Sunset Bank will be less than the fee at Oceanview Bank only when the checking account balance is less than $200.The fee at Sunset Bank will be less than the fee at Oceanview Bank only when the checking account balance is more than $200.The fee at Sunset Bank will always be more than fee at Oceanview Bank. For this structural characteristic, decide if it is a characteristic of DNA, a characteristic of RNA, a characteristic of both or a characteristic of neither? It contains thymine as a base On the top of a hill stands a tower that is 50 feet tall. From a point that is on the samelevel as the base of the hill, the angle of elevation to the top of the tower is 56 and theangle to the bottom of the tower is 51. What is the distance from the given point to thebottom of the tower?a. 74 feetb. 321 feetc. 446 feetd. 47 feet if a= 3 and b= 4 what would c= Can anybody please help me out??? A teacher changed to grading from 50 points + 5 for each correct answer to 50 points + 7 for each correct answer. What would change: the slope. The y intercept, both the slope and the y intercept or nothing Read the passage. Then write a paragraph that explains why the two ecosystems have such different kinds of plants. Use the terms biotic factor, abiotic factor, and limiting factor in your explanation. Passage A group of students is studying the types of plants that grow in a field next to the school. The field is mowed regularly, but it does not get any water other than rainfall. The field has several kinds of plants that are typically found in a grassland ecosystem. But it has none of the plants found in a nearby forest ecosystem. Which equation does this model represent what is the central idea of THE LURE OF SHAKESPEARE The question is in the picture below^^Giving brainliest so no links____________________________________________________________________ v ---- in the book marigolds, what might explain the children's reactions to the marigolds critically evaluate how two conflict management skills and one communication skill can help you in sustaining positive relationships with other people answers r 26820115167 pls pls pls help me giving brainlist The Founding of VirginiaName the two main goal of Virginia Colony.Check all the boxes that applymine for gold and silver.freely practice religion. find a river route the the Pacific Ocean.What is the significance of the Straving Time?Check all the boxes that applyRelations with the Powhatan Indians improved.Nearly all the colonists died.People were forced to eat things they normally would not. Find the distance between the two points rounding to the nearest tenth (if necessary).(8,-3) and (4,6) Please help no link as answers Which object will have more potential energy (PE), a book on the edge of a small bookshelf or a penny sitting on the edge of the Empire State building? EXPLAIN your reasoning.