what is octane number​

Answers

Answer 1

Answer:A measure of performance of fuel for internal combustion engines. Stated simply, a higher octane rating corresponds to more engine power and less knocking or other pre-ignition problems.

Explanation:

I'm also in chemistry.

Answer 2

Answer:

Explanation:

figure indicating the antiknock properties of a fuel, based on a comparison with a mixture of isooctane and heptane.


Related Questions

in one to 2 sentences explain how a stimulus to one type of receptor might be percieved as a simulus to another type of receptor in people who have synesthesia???
HELP

Answers

Synesthetes — or people who have synesthesia — may see sounds, taste words or feel a sensation on their skin when they smell certain scents.

I don't know if this helps at all, but i hope it does.

help :(
If 4.7 moles of oxygen gas are allowed to react with 3.9 moles of iron according to the following equation:
4 Fe + 3 O2 → 2 Fe2O
How many moles of Fe2O3 can be formed?​

Answers

Moles of Fe₂O₃ formed : 1.95

Further explanation

A reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reagents and products.

[tex]\tt 4Fe+3O_2\rightarrow 2Fe_2O_3[/tex]

We find the limiting reactant from the ratio of the mole and the reaction coefficient

Fe ⇒ 3.9 : 4 = 0.975

O ⇒ 4.7 : 3 = 1.56

Because the ratio of Fe is smaller, then Fe becomes the limiting reactant

Reaction

4Fe + 3O₂ ⇒ 2Fe₂O₃

mol Fe₂O₃ from mol of Fe as limiting reactant

mol ratio Fe₂O₃ : Fe = 2 : 4, then mol Fe₂O₃ :

[tex]\tt =\dfrac{2}{4}\times 3.9=\boxed{\bold{1.95}}[/tex]

a student collected data about how different fertilizers affect a plant growth. which type of graph should they use to show the data? PLS HELP ASAP :C worth 100 points lol

Answers

Answer:

I think they should use a bar graph

Explanation:

Because if they use a bar graph they could mark each of the different kind of fertilizer and they could easily see which one affected it the most, either good or bad, by the looking at the heights of the bars to determine your conclusion.

Hi there!

:bar graph:

If they use a bar graph they could mark each of the different kind of fertilizer and they could see easier to tell which one affected it the most, by looking at the heights of the bars to determine the answers.

A piece of aluminum has a mass of 12.0 g. When it is placed into a graduated
cylinder with 14.0 mL of water, the water level rises to 18.5 mL. What is the density
of aluminum?
0 2.66667g/ml
O 2.67 g/mL
O 2.667g/mL
O 2.7 g/mL

Answers

Answer:

The answer is 2.7 g/mL

Explanation:

The density of a substance can be found by using the formula

[tex]density = \frac{mass}{volume} \\[/tex]

From the question

mass = 12 g

volume = final volume of water - initial volume of water

volume = 18.5 - 14 = 4.5 mL

So we have

[tex]density = \frac{12}{4.5} \\ = 2.66666666...[/tex]

We have the final answer as

2.70 g/mL

Hope this helps you

Chelsea adds a 65% acid solution to 25 milliliters of a solution that is 30% acid. How much of the 65%
acid solution should be added to create a solution that is 40% acid?

Answers

Answer:

10 ml

Explanation:

The concentration of the acid solution Chelsea adds to the 25 milliliters of 30% acid solution = 65%

The concentration of the acid solution Chelsea requires = 40%

The volume, X, of the 65% acid solution required is given as follows;

65% × X + 30% × 25 = 40% × (25 + X)

As fractions, we have;

0.65 × X + 0.3 × 25 = 0.4 × (25 + X)

0.65·X + 7.5 = 10 + 0.4·X

0.65·X  - 0.4·X = 10 - 7.5

0.25·X = 2.5

X = 2.5/0.25 = 10

X = 10 ml

The volume of the 65% acid that should be added to create a solution that is 40% acid = 10 ml.

Put the following scientists in order of their discoveries: 1. Dalton, 2. Bohr, 3. Rutherford, 4. Democritus, 5. Thomson
Please help me I really need the answer

Answers

democritus, dalton, thomson, rutherford, bohr

Which of the following is the best structure for CH2O2? Explain your reasoning.

Answers

Answer:

I'm guessing structure 1

Answer:

no

Explanation:

no

g. I am present in meteorites and in the sun. When pure, I am a strong, lustrous, white metal, with a low
density. I have excellent corrosion resistance. I burn in air and am the only element that burns in
nitrogen. I am marvelous in fireworks. What am I, and what is my symbol?

Answers

I think the answer should be titanium, the symbol is Ti.

how are electrons arranged in elements with atomic numbers 1 through 10?

Answers

Answer:

See explanation

Explanation:

For elements with atomic numbers 1-10, the arrangement of electrons is as follows; 1s 2s 2p.

These elements are found in the second period that commences at lithium and ends in neon.

The ten electrons that may be found in the atoms of these elements are arranged in orbitals as shown above.

How many nitrogen atoms are in the chemical
formula below?
5C8H10N402

Answers

Answer:

4 ATOME nitrogen in the formula

There are  20 nitrogen atoms in the chemical formula mentioned.

What is chemical formula?

Chemical  formula is a way of representing the number of atoms present in a compound or molecule.It is written with the help of symbols  of elements. It also makes use of brackets and subscripts.

Subscripts are used to denote number of atoms of each element and brackets indicate presence of group of atoms. Chemical formula does not contain words. Chemical formula in the simplest form  is called empirical formula.

It is not the same as structural formula and does not have any information regarding structure.It does not provide any information regarding structure of molecule as obtained in structural formula.They are used to describe the chemical reactions.

There are four types of chemical formula:

1)empirical formula

2) structural formula

3)condensed formula

4)molecular formula

Learn more about chemical formula ,here:

https://brainly.com/question/11995171

#SPJ2

List 3 properties of solids. Do the same for liquids and gases.

Answers

Answer:

GAS .assumes the shape and volume of its container

particles can move past one another    

.compressible

lots of free space between particles

.flows easily

particles can move past one another

LIQUID assumes the shape of the part of the container which it occupies

particles can move/slide past one another

.not easily compressible

little free space between particles

.flows easily

particles can move/slide past one another

SOLID .retains a fixed volume and shape

rigid - particles locked into place

.not easily compressible

little free space between particles

.does not flow easily

rigid - particles cannot move/slide past one another

What strategy should be done to provide quality education without discrimination?​

Answers

Explanation:

The Committee has already adopted general comment No. ... Non-discrimination - education must be accessible to all, especially the most ... developmental strategy for its school system.as poverty and discrimination and to provide education of sufficient quality, in a manner that ensures children can benefit from it.

A hiker tries to prepare a hard-boiled egg on the high slopes of Mount Everest. The base camp is located 5,300 meters above sea level. The hiker observes that the water begins to boil at 82⁰C, much lower than the 100⁰C needed to cook the raw egg. He hopes that just leaving the egg in the boiling water longer will let the egg cook. Will he have hard-boiled eggs for breakfast?

Answers

Answer:

He will not have hard-boiled eggs for breakfast

Explanation:

The given parameters are;

The elevation at which the base camp of the hiker is located = 5,300 meters

The boiling point of water at the elevation of the base camp = 82°C

The temperature required to cook the raw egg = 100°C

Therefore, we have;

The temperature of the boiling water at the given elevation of the base camp 82°C < The temperature required to cook the raw egg 100°C

Therefore, the eggs will not be hard boiled.

The hiker won't have hard-boiled eggs for breakfast as a result of the

boiling point of water being less than 100⁰C.

The boiling point decreases with an increase in altitude. The hiker was at

5,300 meters above sea level which made the boiling point of water to be

decreased to 82⁰C.

Since the water isn't able to achieve the boiling point of 100⁰C, then the raw

egg won't be hard boiled for breakfast.

Read more on https://brainly.com/question/25725550

3
1 point
1
Select ALL of the true statements
An atom of a given element will still be that element if the number of protons changes
Atoms are mostly made of empty space
An atom of a given element will still be that element if the number of electrons changes
OOGOOO
An atom of a given element will still be that element if the number of neutrons changes
Electrons have a negligible mass compared to the rest of the atom
The atoms mass comes mostly from the neutrons
Previous

Answers

Answer:

Not 100% sure but...

Explanation:

I know that the second, third and fifth one are correct, not sure if there are any more.

which statement describes what happens inside
a liquid thermometer that shows an increase in
temperature?
a. the volume of the liquid decreases because
of an increase in kinetic energy.
b. the movement of the particles decreases
because of a decrease in kinetic energy. .
c. the volume of the liquid increases because
the movement of the particles decreases.
d. the movement of the particles increases
because of an increase in kinetic energy.

Answers

Answer:the volume of the liquid increases

Explanation:

If you were to decrease thermal energy, what would happen to the particles?

Answers

Answer: Explanation:

You can change an object's state of matter by adding or removing thermal energy. When you add thermal energy to an object, these things can happen: Particles move faster (increased kinetic energy). Particles get farther apart (increased potential energy).

why hot water is hot on touching?​

Answers

Thermal Energy

When a rise in temperature causes atoms and molecules to move faster and collide with each other. The energy that comes from the temperature of the heated substance is called thermal energy.

Why don't molecular compounds conduct electricity when dissolved in water?

Answers

Answer:

Ionic compounds conduct electricity when dissolved in water, because the dissociated ions can carry charge through the solution. Molecular compounds don't dissociate into ions and so don't conduct electricity in solution.

Autism is a disability that results from a disorder in the central nervous system. It has been speculated that the increasing number of cases of autism in recent years is due to the increase in the number of vaccinations given to young children. What might be another possible explanation for this phenomenon?

Answers

Answer:

Explanation:

As described in the question, autism is a disability that arises from a disorder in the central nervous system which is actually characterized by abnormality in the brain structure and then function. Autism is known for symptoms such as challenges with communication and interaction and some obsessive behaviors. While there is generally no known scientific cause for autism but trends have suggested that vaccination in young children causes autism.

However, genes could also be involved in this phenomenon because there have been reports of unusual genetic sequence in children that have autism. Hence, there is a possibility that vaccination actually triggers this genetic sequence which is then expressed as autism in the children.

Please note this isn't a scientific fact and just a possibility as requested in the question.

The elements least likely to form bonds are found in which group? 15 16 17 18

Answers

Answer:

i think 15 but dont get mad if not (❁´◡`❁)

Explanation:

Answer:

The answer is 18

Explanation:sorry if im wrong TwT

What element have 5 energy levels of electrons. Which as an atom the last electron is found in the 5p^3

Answers

Answer:

I hope this answer is correct

Explanation:

Element having electronic configuration 1s

2

,2s

2

,2p

6

,3s

2

,3p

6

,3d

10

,4s

2

,4p

6

,4d

10

,5s

2

,5p

3

Infer what the term “biogeochemical cycles” means. How do you think the term relates to a food chain?

Answers

Answer: Biogeochemical cycles are usually described with box models.

Explanation: Matter flows through trophic levels and elements are recycled among ecosystems using biogeochemical cycles. As nutrients move through ecosystems, the compounds they form are usually transformed.

is sandy, silt, or clay loam better? and why?

Answers

clay soils are often rich in plant nutrients. In contrast, sandy soils can drain water too quickly for healthy plant growth and tend to be low in nutrients, but they are easier to work.

write the addition reaction of butane and bromine ​

Answers

They react rapidly with bromine, for example, to add a Br2 molecule across the C=C double bond. ... When it is mixed with an alkene or alkyne, the color of Br2 rapidly disappears. The reaction between 2-butene and bromine to form 2,3-dibromobutane is just one example of the addition reactions of alkenes and alkynes.

A substance with a pH of 3 has more ____________ions than ____________ions

Answers

Answer:

Hydrogen... Hydroxide

Explanation:

The number in pH is a logarithm, so when something has a higher pH by 1, it is 100 times more powerful.

Besides, the H in pH is Hydrogen.

Explain why rain water is not pure

Answers

Answer:

before it evaporated into the air, it was on the Earth...and it could have been contaminated/dirtied. There isn't a process during evaporation that cleans water...you have to purify it yourself.

Explanation:

How many atoms of aluminum (Al) are contained in 3.73 moles of alumni

Answers

Number of atoms : 2.245 x 10²⁴

Further explanation  

A mole is a number of particles(atoms, molecules, ions)  in a substance

This refers to the atomic total of the 12 gr C-12  which is equal to 6.02.10²³, so 1 mole = 6.02.10²³ particles  

Can be formulated :

N = n x No

N = number of particles

n = mol

No = 6.02.10²³ = Avogadro's number

n= 3.73 moles

Number of atoms :

[tex]\tt 3.73\times 6.02\times 10^{23}=\boxed{\bold{2.245\times 10^{24}}}[/tex]


How many oxygen atoms are in the formula Tetrasulfur pentoxide?

a. 3
b. 4
c. 5
d. 2

Answers

B.4 sorry this might not be right

Convert each measurement into scientific notation. For example, 8.73 Ms is the same as 8.73 x 106 because the “M” stands for 106
107pg

(I'm assuming I have to convert the 107pg but I am unsure of how to answer this)

Answers

Answer:

[tex]107pg = 107 \times {10}^{ - 12}g =1.07 \times {10}^{ - 10} g\\ because \: pico, \: p = {10}^{ - 12} .[/tex]

Johnny wanted to paint the ceiling of his room to show the stars of the Milky Way galaxy. What color(s) should he use?

Answers

Answer:

He should use black a light purple brown, tan, blue, and just a tiny bit of pink!

Hope this helps!!

Explanation:

If Johnny wanted to show the brightness of the stars, he should use blue, light blue, yellow, orange, red, and white.

What is Milky way??

The Milky Way is a huge collection of stars, dust and gas .

The Milky Way is seen as a mostly flat, irregularly-shaped feature that stretches from side to side The Milky way is the mixture of the colors as blue , yellow , orange  and white so that it express the appearance of brightness of stars , dust and gas

Hence , Johnny should use blue, light blue, yellow, orange, red, and white.

Learn more about milky way below

https://brainly.com/question/13956361

#SPJ2

   

Other Questions
Can I have help with an algebraic equation? 1. What is the width of a rectangle with a length of 14 cm and area 161 cm2? Formula: A=L*W2. What is the radius of a circle with a circumference of 13 ft? Formula: C=2PI*R3. A rectangle has a perimeter 182 in. and length 52 in. What is the width? Formula: P=2*L+2*W4. A triangle has a base of 7 m and an area of 17.5 m2. What is the height? Formula: A=1/2*b*hPls Show Work What does the word keep mean in keep change flip a) keep everything the same b) keep the first fraction the same c) keep the second fraction the same d) keep the sing the same. what was the treaty of paris what describes the ancient empire of Ghana? Form questions for the given answers.A. I was born in the national capital of India. plzzz answer al 5 How does the section "You've Got To Think Ahead" best contribute to the development of ideas in the Newsela article "50 Below is Quite Cold, Even for Alaska"?1 It describes how Alaskans struggle against cold weather.2 It indicates that Alaska is suffering from much colder weather than usual.3 It describes how Alaskans adapt to the cold weather to carry out their daily tasks.4 It shows how the cold weather affects Alaskas economy.What is the authors purpose in mentioning that there are no airplanes flying over Fairbanks and that cars are parked in the Newsela article "50 Below is Quite Cold, Even for Alaska"?1 to inform readers about the distance between Fairbanks and other cities2 to persuade Alaskans to walk to their destinations when able3 to explain how hard it is to travel throughout Alaska4 to describe how the cold weather affects transportation in AlaskaHow does the setting affect the speaker at the end of the poem "The Cremation of Sam McGee"?The quiet setting of the Arctic convinces the speaker to visit Sam McGee's home in Tennessee.The distant setting of the Arctic motivates the speaker to travel a long distance to find Sam McGee.The strange setting of the Arctic causes the speaker to see Sam McGee in the furnace, alive and warm.The unfamiliar setting of the Arctic causes the speaker to lose his mind at the end of the poem.1 What is a theme of Part I of "The Highwayman"?2 When people are in love, they live happily.3 Being in love can give one's life purpose.4 It is hard to find love when one leads a life of crime.5 Leaving a loved one behind is often a mistake.How does the poet show that the highwayman has a positive view of Bess in Part I of "The Highwayman"?The highwayman calls to his beloved Bess by whistling "a tune to the window."The highwayman calls Bess his "bonny sweetheart" and promises to return "though hell should bar the way."The highwayman promises to return with "yellow gold before the morning light."The highwayman repeats the phrase "by moonlight" to show his feelings toward Bess. Drs. Glenn Feltham and David Ambrose began operations of their physical therapy clinic, called Northland Physical Therapy, on January 1, 2017. The annual reporting period ends December 31. The trial balance on January 1, 2018, was as follows (the amounts are rounded to thousands of dollars to simplify):Account Titles Debit CreditCash $ 6Accounts Receivable 2Supplies 2Equipment 10Accumulated Depreciation $3Software 8Accumulated Amortization 3Accounts Payable 6Notes Payable (short-term) 0Salaries and Wages Payable 0Interest Payable 0Income Taxes Payable 0Deferred Revenue 0Common Stock 13Retained Earnings 3Service Revenue 0Depreciation Expense 0Amortization Expense 0Salaries and Wages Expense 0Supplies Expense 0Interest Expense 0Income Tax Expense 0Totals $28 $28Transactions during 2018 (summarized in thousands of dollars) follow:Borrowed $13 cash on July 1, 2018, signing a six-month note payable.Purchased equipment for $16 cash on July 2, 2018.Issued additional shares of common stock for $6 on July 3.Purchased software on July 4, $2 cash.Purchased supplies on July 5 on account for future use, $8.Recorded revenues on December 6 of $47, including $9 on credit and $38 received in cash.Recognized salaries and wages expense on December 7 of $21; paid in cash.Collected accounts receivable on December 8, $8.Paid accounts payable on December 9, $9.Received a $2 cash deposit on December 10 from a hospital for a contract to start January 5, 2019. Data for adjusting journal entries on December 31:Amortization for 2018, $3.Supplies of $2 were counted on December 31, 2018.Depreciation for 2018, $3.Accrued interest of $1 on notes payable.Salaries and wages incurred but not yet paid or recorded, $4.Income tax expense for 2018 was $3 and will be paid in 2019.Record journal entries for transactions (a) through (j).Cash 13Notes-payable (short term) 13Equipment 16 Cash 16Cash 6Common Stock 6Software 2Cash 2Supplies 8Accounts Payable 8Accounts Receivable 9Cash 38Service Revenue 47Salaries and Wages Expense 21Cash 21Cash 8Accounts Receivable 8Accounts Payable 9Cash 9Cash 2Deferred Revenue 2Set up T-accounts for the accounts on the trial balance. Enter beginning balances and post the transactions (a)-(j), adjusting entries (k)-(p), and closing entry.Prepare an unadjusted trial balance and a trial balance. did the federalists or the republicans best embody the principles of the revolution? Dont understand algebra 1 Consider the reaction when aqueous solutions of calcium nitrate and potassium carbonate are combined. The net ionic equation for this reaction is: Hola, cmo ests? Espero que todos estn bien. Estoy sper aburrido y quiero ir a dormir, pero no puedo, as que tambin necesito puntos. Podras bonita? Por favor, haz algunas preguntas para que pueda responder. Sera muy apreciado When given a system of equations in slope-intercept form, is graphing or substitution the most efficient method to solve? With regard to voting rights, what issues do you think still may be up for debate? Is it ok to wait to see a doctor after breaking your ankle? 4. Vector A is 7.00 units in length and points along the positive x-axis. Vector B is 5.00 units in length and points along the negative x-axis. find the magnitude and direction of A+2B 1 point What is the difference between chromosome translocation and crossing over? Plzzzz I need help plz I will do Anything what is this problem please answer fast I am in a test thank you I need a,b,c answered Nicole won 85 super bouncy balls playingthe bean bag toss at her school's gamenight. Later, she gave four to each of herfriends. She only has 5 remaining. Howmany friends does she have? PLEASE HELP ASAPTriangle ABC is transformed to triangle ABC, as shown below:A coordinate grid is shown from negative 4 to 0 to 4 on both x- and y-axes. A triangle ABC has A at ordered pair negative 1, 3, B at ordered pair 0, 1, C at ordered pair negative 3, 0. A triangle A prime B prime C prime has A prime at ordered pair negative 1, negative 3, B prime at ordered pair 0, negative 1, C prime at ordered pair negative 3, 0.Which equation shows the correct relationship between the measures of the angles of the two triangles?The measure of angle CAB = The measure of angle C prime B prime A primeThe measure of angle BCA = The measure of angle A prime B prime CThe measure of angle CAB = The measure of angle C prime A prime B primeThe measure of angle BCA = The measure of angle C prime A prime B prime