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djyliett [7]
3 years ago
7

Consider the picture of a gas pump. Which type of gasoline has the highest percentage of octane (the main component of gasoline)

?
unleaded: 87 octane rating

mid-grade: 89 octane rating

premium: 91 octane rating
Chemistry
2 answers:
Readme [11.4K]3 years ago
5 0

Answer:

premium: 91 octane rating

Explanation:

Octane number refers to the percentage or volume fraction of isooctane in a fuel.

The octane number gives a picture of how safe a fuel is for an engine. The higher the octane rating the lesser the tendency of the fuel to cause knocking of the engine.

The type of gasoline with the highest percentage of octane among the options is premium.

riadik2000 [5.3K]3 years ago
4 0

Answer:

c. premium: 91 octane rating

Explanation:

i got it right on EDG2021

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What type of reaction is: 4 Fe + 3 O2 → 2 Fe2O3
Dafna11 [192]

Answer:

A. synthesis

Explanation:

The reaction given is a synthesis reaction in which two substances combines to give a product.

In this reaction:

      4Fe + 3O₂ →  2Fe₂O₃

The reaction involves the formation of a single product from two or more reactants.

The formation of a compound from union of the constituent elements also falls into this category of reaction.

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3 years ago
Reason the Carbon Cycle is necessary to sustain life on Earth
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<span>Most living things on Earth are made of carbon.


Living things need carbon in order to live, grow, and reproduce.


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6 0
3 years ago
If 1.00 calorie = 4.18kj, how many kj of energy can be released by an apple containing 125 cal?
Georgia [21]

Answer:

the answeerrrr issues c

6 0
3 years ago
Solid material whose atoms are arranged in a repeating pattern is ______
Alenkasestr [34]

Answer:

crystal structure

Explanation:

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7 0
3 years ago
A gas sample occupies a volume of 1.264 L when the temperature is 168.0 °C and the pressure is 946.6 torr. How many molecules ar
alukav5142 [94]

Answer:

0.26×10²³ molecules

Explanation:

Given data:

Volume of gas = 1.264 L

Temperature = 168°C

Pressure = 946.6 torr

Number of molecules of gas = ?

Solution:

Temperature = 168°C (168+273= 441 K)

Pressure = 946.6 torr (946.6/760 = 1.25 atm)

Now we will determine the number of moles.

PV = nRT

P= Pressure

V = volume

n = number of moles

R = general gas constant = 0.0821 atm.L/ mol.K  

T = temperature in kelvin

n = PV/RT

n = 1.25  atm ×1.264 L / 0.0821 atm.L/ mol.K   ×441 K

n = 1.58 /36.21 /mol

n = 0.044 mol

Now we will calculate the number of molecules by using Avogadro number.

1 mol = 6.022×10²³ molecules

0.044 mol × 6.022×10²³ molecules/ 1mol

0.26×10²³ molecules

5 0
3 years ago
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