what ere the different types of petrol used in petrol pumps?what is the composition of each and what type of vehicle is each suitable for?is there a difference in the price?

Answers

Answer 1

Answer: Petrol is primarily characterised by its octane number which defines its ability to burn efficiently and produce more energy per unit. A low octane petrol particle blast inside the engine instead of burning from spark this is called knocking as it produces knocking sound in the engine, to counter this an anti-knocking agent is added to petrol. Earlier Lead was used as an anti-knocking agent but it is highly toxic ,also the researchers who experimented lead with petrol died unnatural death. In later stages when effects of lead toxicity started showing up lead was replaced by benzene compounds as anti-knocking agents this is know as Unleaded petrol. Benzene is carcinogenic and started showing its ill effects after few years especially in densely populated cities. Govts have reduced the concentration of benzene in petrol thereafter and emphasised on implementation of Euro iv standards.

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Why aren't the atomic masses of most elements whole numbers

Answers

Isotopes and most average aren't whole numbers

Which statement best explains the symbol [NaCl]? moles of water per liter of NaCl moles of water per liter of solution moles of NaCl per liter of solution moles of NaCl per liter of water

Answers

Answer:

moles of NaCl per liter of solution.

Explanation:

[NaCl] is an expression of the concentration of NaCl.

If the concentration is the molarity;

Molarity can be defined as the no. of moles of solute dissolved per a 1.0 L of the solution.

For [NaCl] is a symbol for: moles of NaCl per liter of solution.

Answer: moles of $NaCl$ per liter of solution

Explanation:

Molarity of a solution is defined as the number of moles of solute dissolved per Liter of the solution.

$Molarity=(n)/(V_s)$

where,

n= moles of solute

$V_s$ = volume of solution in L

Square brackets represents the concentration of a substance i.e. amount of solute dissolved per liter of the solution.

Thus $NaCl$ represents moles of $NaCl$ per liter of solution.

What hypotheses could you propose about the relationship between the position of a type of atom in a molecule and the number of bonds that the atom forms?

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The answer is: the atom with more valence electrons are in the middle of a molecule and it form more bonds.

For example, molecule hydrogen cyanide (HCN).

Lewis structure for hydrogen cyanide is H:C:::N:

Hydrogen has valence one (I), it means it has one single bond and electron configuration like closest noble gas helium.

Carbon has valence four (IV), it has four bonds (one with hydrogen and three with nitrogen) and full octet.

Nitron has valence three (III), it has full octet and electron configuration like noble gas neon (Ne).

Hydrogen cyanide has linear shape (the bond angles of 180 degrees).

It depends entirely upon the number of electrons in the valence electrons. There is no correlation between the position in the molecule and the number of bonds the atom forms.

Which type of landforms forms at the plate boundary as a result of this stress

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The different landforms at the plate boundaries are volcanoes, mid-ocean ridges, mountains, trunches, islands etc.

What is a plate boundary?

A plate boundary is the boundary between two tectonic plates. There are three types of plate boundaries, namely convergent boundary formed by the converging movement of two plates, divergent boundaries and transform boundaries formed by slide past of two plates each other.

Volcanoes and ridges are landforms generated by tectonic plate movement. Some volcanoes form when plates pull apart beneath the ocean. A crack appears in the earth's crust. As magma rises through the crack, ridges form.

If , neither plate slides beneath the other the pressure between the two plates must be relieved, which is accomplished by thrusting the colliding plate's edges upward. In the collision zone, land folds, bends, and twists, and mountain landforms rise.

To find more on plate boundaries, refer here:

brainly.com/question/18256552

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Answer:

Landform: MID-OCEAN RIDGE Plate Boundary: DIVERGENT Type of Plates: 2 Oceanic Plates (OP) pull apart How is it formed? Two oceanic plates (OP) move away from each other, allowing magma to rise up from inside the Earth. The magma reaches the bottom of the ocean, turns in to lava and cools (forming new rock)

Explanation:

Gina pours some sugar in a hot pan. The sugar melts. She placesthe pan with the melted sugar in a cool place. The sugar hardens inone single piece. How does Gina's model compare to the way an actualigneous rock would form?

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the sugar is melted like the magma then cooled to make the sugar hard like the magma cooling and hardening to for into a igneous rock

2 The change in the velocity of an object is defined as its

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Answer:

Acceleration is the rate of change in velocity

Answer:

The rate of change of velocity of an object is defined as its acceleration

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