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3 years ago

The octane number of fuel is 79%. What does that mean

Chemistry

1 answer:

sladkih [1.3K]3 years ago

6 0

Answer:

Octane number, measure of the ability of a fuel to resist knocking when ignited in a mixture with air in the cylinder of an internal-combustion engine.

Octane number is also known as octane rating. Octane numbers are based on a scale on which isooctane is 100 (minimal knock) and heptane is 0 (bad knock). The higher the octane number, the more compression required for fuel ignition. Fuels with high octane numbers are used in high performance gasoline engines.

(Hope this helps) Sky

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Oxidation number of sulphur in H2SO4

DochEvi [55]

Answer

let the oxidation of sulphur is x

2(+1)+x+4(-2)=0

+2+x-8=0

+2-8+x=0

-6+x=0

x=6

Explanation:

i hope this will help you:)

8 0

4 years ago

What is the necessary voltage to power the electrolysis of molten sodium chloride?

sammy [17]

4V is the necessary voltage to power the electrolysis of molten sodium chloride.

To create sodium metal and chlorine gas, molten (liquid) sodium chloride can be electrolyzed. A Down's cell is the name of the electrolytic cell utilised in the procedure. The liquid sodium ions in a Down's cell are converted to liquid sodium metal at the cathode. Liquid chlorine ions are oxidised to chlorine gas at the anode. Below is an illustration of the reactions and cell potentials:

oxidation: $2Cl^{-} (l)$ → $Cl_{2} (g)$ + $2e^{-}$ E°= -1.36V

reduction: $Na^{+} (l) + e^{-}$ → $Na (l)$ E°= -2.71V

overall : $2Na^{+} (l) + 2Cl^{-} (l)$ → $2Na(l) +Cl_{2} (g)$ E° $_{cell}$ = -4.07V

For this electrolysis to take place, the battery needs to supply more than 4 volts. The only means to obtain pure sodium metal is by this reaction, which also serves as a significant source of chlorine gas generation. Swimming pools and other surfaces are frequently cleaned and disinfected with chlorine gas.

Learn more about sodium chloride here;

brainly.com/question/9811771

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6 0

2 years ago

Can someone help, please ??

Zinaida [17]

Number 13 is D. Mendeleev. He was a Russian chemist and inventor who formulated the periodic table.

5 0

3 years ago

Read 2 more answers

A 1 mol sample of gas has a temperature of 225K, a volume of 3.3L, and a pressure of 500 torr. What would the temperature be if

serg [7]

<h3>Answer:</h3>

78.75 K

<h3>Explanation:</h3>

<u>We are given;</u>

Initial pressure, P₁ = 500 torr
Initial temperature,T₁ = 225 K
Initial volume, V₁ = 3.3 L
Final volume, V₂ = 2.75 L
Final pressure, P₂ = 210 torr

We are required to calculate the new temperature, T₂

To find the new temperature, T₂ we are going to use the combined gas law;
According to the combined gas law;

P₁V₁/T₁ = P₂V₂/T₂

We can calculate the new temperature, T₂;

Rearranging the formula;

T₂ =(P₂V₂T₁) ÷ (P₁V₁)

= (210 torr × 2.75 L × 225 K) ÷ (500 torr × 3.3 L)

= 78.75 K

Therefore, the new volume of the sample is 78.75 K

5 0

4 years ago

_A1Br3+_K=_KBr+_A1<br> fill in the correct coefficients.

Nataly_w [17]

1 A1Br3 + 3 K = 3 KBr + 1 A1

3 0

3 years ago