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tatiyna
3 years ago
10

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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Mass = 325.2 volume = 62.5 cm what's the density ?
boyakko [2]

Answer:

159571 lb or cubic feet

Explanation:

3 0
3 years ago
Read 2 more answers
What mass of sodium hydroxide is needed to neutralise 24.5kg of sulfuric acid <br> H2SO4 + N2 = 2NH3
sveticcg [70]

Answer:

23.92 g

Explanation:

Molar mass of H2SO4 = (2×1)+32+(16×4)= 2+32+48= 82g/mol

H2SO4 + 2NaOH ---> Na2SO4 + 2H2O

I mole of H2SO4 = 2 moles of NaOH

24.5/82 = 24.5/82 × 2

= 0.598 moles of NaOH will neutralize

Mass= mole× molar mass

Molar mass of NaOH= 23+16+1 = 40g/mol

Mass= 0.598 × 40 = 23.92g of NaOH

7 0
3 years ago
The relative strengths of covalent bonds and van der Waals interactions remain the same when tested in a vacuum or in water. How
trasher [3.6K]

Answer and Explanation:

The explanation given in the problem is correct but not totally encompassing.

Van der waals interactions are a type of hydrophobic interaction, in which they do not interact with the polar water molecule. Covalent bonds involve the sharing of electrons between atoms of relatively similar electronegativities, and are most often too strong to disrupt by polar molecules of water. Therefore, covalent bonds and van der waals forces have an Intrinsic bond strength value that is independent of the environment.

However, either the partial negative oxygen atom or the partial positive hydrogen atoms in water molecules disrupt hydrogen or ionic bonds. Water is known to form hydrogen bonds with other polar or charged molecules, thus reducing the strength of interaction these molecules would normally have in the absence of water. Basically, these compounds with Hydrogen or Ionic bonds ionize, whether partially or fully in water, thereby leading to a decrease in bond strength in water.

QED!

7 0
3 years ago
Convert the following numbers of calories or
nignag [31]

Answer:

a 32823.48joules

b  1979.8688 joules

c. 1979.8688

Explanation:

4 0
3 years ago
If an equal number of moles of the weak acid HF and the strong base KOH are added to water, is the resulting solution acidic, ba
s344n2d4d5 [400]

Answer:

Being a weak acid and a strong base, where it is diluted in a neutral medium such as water, the basic medium predominates, almost alkaline pH.

Explanation:

The acidity of the solution, being weak, means that its pH is not so low, therefore it will be easier to reach the values of 7 or 7 where alkalinity or basity is indicated.

6 0
3 years ago
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