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ankoles [38]
1 year ago
7

One of the compounds used to increase the octane rating of gasoline is toluene (right). Suppose 20.0 mL of toluene (d = 0.867 g/

mL) is consumed when a sample of gasoline burns in air.
(a) How many grams of oxygen are needed for complete combustion of the toluene?
Chemistry
1 answer:
Nadusha1986 [10]1 year ago
5 0

<u>54.12g </u>of oxygen are needed for complete combustion of the toluene.

<h3>What is toluene?</h3>

Toluene is a transparent, colourless liquid that, when heated to room temperature, turns into a vapour. A strong or sweet smell coming from toluene vapour indicates exposure.

Typically, toluene is combined with other solvents, chemicals, and substances like paint pigments. Many sectors and workplaces utilise products that may include toluene, such as paint, metal cleaners, and adhesives. Toluene is also present in fuels such as gasoline. Workers exposed to toluene may work with paints, varnishes, shellac, nail polish, glues & adhesives, rust inhibitors, or printing inks.

Toluene exposure in the workplace can occur by inhalation, skin contact, splashing into the eyes, and ingestion. Workers who are exposed to this kind of thing may become ill right away or experience repercussions later. Exposures to toluene have been investigated in auto repair, construction, nail salons, and printing facilities.

Learn more about toluene?

brainly.com/question/8696404

#SPJ4

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5 0
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Oksi-84 [34.3K]

Your question has been heard loud and clear.

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Because , scientific laws are proven and so they are real not hypothetical.

Whereas scientifc theories can be hypothetical.

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4 0
3 years ago
Which characteristics are common to the three isotopes of hydrogen?
allsm [11]
D should be the correct answer.  isotopes are atoms that have the same atomic number (number of protons) but different atomic masses (number of protons and neutrons).  isotopes also have the same number of electrons since atoms need to have equal numbers of protons and electrons to not be considered ions.  Since the number of protons determines the chemical properties of the atom, we can say that all isotopes have the same chemical properties due to the fact that all isotopes have the same atomic number.

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8 0
3 years ago
Which of the following is TRUE? a neutral solution does not contain any H3O+ or OH- a neutral solution contains [H2O] = [H3O+] a
Gnom [1K]

Answer:

Options B and C

Explanation:

Let's take a look at the options and get our answer by way of elimination. The basic definition of a neutral solution is given as;

A neutral solution is a substance which is neither acid nor basic . it has a PH of 7. it will have equal amount of H+ AND OH- ions in it.

a) a neutral solution does not contain any H3O+ or OH- This is wrong because take water as an example, it is neutral but contains both ions.

b) a neutral solution contains [H2O] = [H3O+]. This option is correct cause it is in line with the definition above.

c) an acidic solution has [H3O⁺] > [OH⁻]. Acidic solutions are any solution that has a higher concentration of hydrogen ions than water. This option is correct.

d) a basic solution does not contain any H3O⁺. This option is wrong. Basic solutions are any solution that has a higher concentration of hydroxide ions than water. This means they contain H3O⁺ but  [OH⁻] is greater.

7 0
3 years ago
How long does it take to electroplate 0.5 mm of gold on an object with a surface area of 31 cm^^ from an Au3+(aq) solution with
konstantin123 [22]

Answer:

It will take 5492 seconds to electroplate 0.5 mm of gold on an object .

Explanation:

Mass of gold = m

Volume of gold = v

Surface area on which gold is plated = a=31 cm^2

Thickness of the gold plating  = h = 0.5 mm = 0.05 cm

1 mm = 0.1 cm

V=a\times h=31 cm^2\times 0.05 cm=1.55 cm^3

Density of the gold = d=19.3 g/cm^3

m=d\times v=19.3 g/cm^3\times 1.55 cm^3=29.915g

Moles of gold = \frac{29.915 g}{197 g/mol}=0.152 mol

Au^{3+}+3e^-\rightarrow Au

According to reaction, 1 mole of gold required 3 moles of electrons,then 0.152 moles of gold will require :

\frac{3}{1}\times 0.152 mol=0.456 mol of electrons

Number of electrons = N =0.456\times \times 6.022\times 10^{23}

Charge on single electron = q=1.6\times 10^{-19} C

Total charge required = Q

Q=N\times q

Amount of current passes = I = 8 Ampere

Duration of time  = T

I=\frac{Q}{T}

T=\frac{N\times q}{I}

=\frac{0.456\times \times 6.022\times 10^{23}\times 1.6\times 10^{-19} C}{8 A}=5492 s

It will take 5492 seconds to electroplate 0.5 mm of gold on an object .

7 0
3 years ago
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