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3 years ago

13. The quality of petrol as an engine

Chemistry

1 answer:

quester [9]3 years ago

8 0

Answer:

The correct option is;

A. Branched chain alkanes

Explanation:

By the process of cracking of petroleum, higher quality petrol are formed by converting straight chain petrol to branched petrol, which are the grade of petrol that burns more smoothly and therefore efficiently within internal combustion engines

The cracking process includes;

a) The conversion of alkanes which are large molecules into branched octanes

b) The conversion of alkanes with straight chain into branched chain alkanes

c) The formation of a branched chain alkane and an alkene from straight chain alkanes

d) The formation of branched chain alkane and hydrogen gas from a straight chain alkane.

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How many molecules are in 20.0 L(liters) of SO2 at STP

Finger [1]

5.4 x 10²³ molecules

Explanation:

Given parameter

Volume of gas = 20L

Condition of reaction = STP

Unknown:

number of molecules

Solution:

The number of molecules of a substance is given by;

Number of molecules = Number of moles x avogadro's constant

Number of moles at stp = $\frac{volume of gas}{22.4}$

Number of moles of SO₂ = $\frac{20}{22.4}$ = 0.893mole

Number of molecules = 0.893 x 6.02 x 10²³ = 5.4 x 10²³ molecules

learn more:

Number of molecules brainly.com/question/10818009

#learnwithBrainly

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3 years ago

Express 7.25 in scientific notation

sergeinik [125]

Considering that scientific notation has to move the decimal over so there is only one digit in the Tens place, that is the scientific notation.

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3 years ago

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Given 1.00 grams of each of the following radioisotopes, Ca-37, U-238, P-32 and Rn-222,which would have the least remaining orig

erica [24]

1) Ca-37, with a half-life of 181.1(10) ms.

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4 years ago

What is the maximum value of the secondary quantum number (l) allowed for atomic electrons with a principal quantum number n = 7

Elis [28]

Explanation:

Principal quantum number=n=7

Azimuthal quantum number=l:-

$\\ \sf\longmapsto n-1$

$\\ \sf\longmapsto 7-1$

$\\ \sf\longmapsto \ell=6$

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3 years ago

Vikki [24]

Answer: ar

Explanation:

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3 years ago