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Serhud [2]
3 years ago
6

An internal combustion engine relies primarily on the efficient production of energy by the combination of oxygen (02) and gasol

ine (assume this is primarily octane, C8H18). Write the chemical equation for this reaction and derive the exact ratio of oxygen to octane for 100% efficiency.
Chemistry
1 answer:
jeka57 [31]3 years ago
7 0
Answer is: <span>the exact ratio of oxygen to octane for is 12.5 : 1.
</span>Balanced chemical reaction: C₈H₁₈ + 25/2O₂ → 8CO₂ + 9H₂O or multiply by 2:
2C₈H₁₈ + 25O₂ → 16CO₂ + 18H₂O.
There same number of atoms on both side of balanced chemical reaction: eight carbon atoms, eighteen hydrogen atoms and twenty five oxygen atoms.

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Identify the effect of increasing acidity on the solubility of the given compounds.
Ilia_Sergeevich [38]

All the given compounds are basic on acidifying their solubility increases.

<u>Explanation:</u>

  • C a_{3}\left(P O_{4}\right)_{2} solubility will increase, since it is basic in nature, on acidifying  solubility increases.
  • F e S being basic on acidification, the solubility increases.
  • M g C O_{3} is alkaline in nature, it gets neutralized and there is no increase in acidity.
  • M g B r_{2} is a salt and it shows no effect on acidification.
  • A g I is a salt but insoluble in water and shows no effect on acidification.
  • M g(O H)_{2} is strongly basic in nature, on acidifying the solubility increases.
4 0
4 years ago
Please help meeee ;-;
Elena-2011 [213]

Answer:

number (12 is c)  (13 is 5) (14 is 5)

Explanation:

3 0
3 years ago
Read 2 more answers
If the pH of a wine is too high, say, 4.0 or above, the wine becomes unstable and has a flat taste. (a) A certain California red
Cerrena [4.2K]

Answer:

The Californian red wine (pH 3.5) has a hydrogen concentration of 0.00032M

The italian white wine (pH 2.9) has a hydrogen concentration of 0.00126 M

Explanation:

<u>Step 1:</u> Data given

Wine 1 has a pH of 3.5

Wine 2 has a pH of 2.9

Wine 2 is more acid so should have more hydrogen ions

<u>Step 2:</u> Calculate hydrogen concentration

pH = -log [H+]

Wine 1: pH = 3.5 = -log[H+]

[H] = 10 ^-3.5 M = 0.00032 M

Wine 2: pH =2.9 = -log[H+]

[H+] = 10^-2.9 = 0.00126 M

The Californian red wine (pH 3.5) has a hydrogen concentration of 0.00032M

The italian white wine (pH 2.9) has a hydrogen concentration of 0.00126 M

The italian white wine has a higher concentration of hydrogen ions, what means it's more acid than the californian red wine.

8 0
3 years ago
What is the connection between Archimedes and the Mass-Volume lab
Usimov [2.4K]

Answer:

Explanation:

This question is not very clear, however, going by the key words in the question, Archimedes' principle shows a relationship between mass and volume.

Archemedes' principle states that when a body is fully or partially immersed in fluid, it is acted upon by an upward force which is equal to the weight of the fluid displaced by the body.

The volume displaced here can be determined using the formula

Density of liquid = mass displaced ÷ volume

Hence, volume = mass displaced ÷ density of liquid

4 0
3 years ago
The density of silicon is 2.33 g/cm 3 . What is the volume of a piece of silicon that has a mass of 83.8 g ?
horrorfan [7]
Density is found by dividing mass over volume:
d=M/V. In this problem, we know the density, and the mass. Solve the general equation for volume, then enter the values from the problem and evaluate:
d=m/v [multiply v to both sides, then divide d from both sides]

v=m/d
v=83.8g/(2.33g/cm³)
v=35.965 cm³
v=36.0 cm³ to three significant figures (since your given information only has 3  sig figs)
5 0
3 years ago
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