1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
lakkis [162]
3 years ago
10

How many moles of steam are produced when 5.74 moles of octane (C8H18) react?

Chemistry
1 answer:
crimeas [40]3 years ago
3 0
This is a combustion reaction, which always has the hydrocarbon and oxygen as reactants and then carbon dioxide and water (which is steam in this case) as products.

C8H18 + O2 —> CO2 + H2O

Balance your carbons first. You want to get 8 carbons on both sides.

C8H18 + O2 —> 8CO2 + H2O

Now balance your hydrogens. You want 18 hydrogens on both sides.

C8H18 + O2 —> 8CO2 + 9H2O

Now balance your oxygens. You have 2 on the left and 25 on the right. The O2 reactant needs a coefficient of 12.5 to balance this.

C8H18 + 12.5O2 —> 8CO2 + 9H2O

However, you can’t have decimals for coefficients in a reaction. So, multiply everything by 2.

2C8H18 + 25O2 —> 16CO2 + 18H2O

Now, use your mole ratio of 18 mol H2O for every 2 mol C8H18 to solve.

5.74 mol C8H18 • (18 mol H2O / 2 mol C8H18) = 51.7 mol H2O (steam)
You might be interested in
The reaction C 4 H 8 ( g ) ⟶ 2 C 2 H 4 ( g ) C4H8(g)⟶2C2H4(g) has an activation energy of 262 kJ / mol. 262 kJ/mol. At 600.0 K,
ludmilkaskok [199]

Answer: 4.3\times 10^{-13}s^{-1}

Explanation:

According to the Arrhenius equation,

K=A\times e^{\frac{-Ea}{RT}}

or,

\log (\frac{K_2}{K_1})=\frac{Ea}{2.303\times R}[\frac{1}{T_1}-\frac{1}{T_2}]

where,

K_1 = rate constant at 600.0K = 6.1\times 10^{-8}s^{-1}

K_2 = rate constant at 775.0 = ?

Ea = activation energy for the reaction = 262 kJ/mol = 262000J/mol

R = gas constant = 8.314 J/mole.K

T_1 = initial temperature = 600.0K

T_2 = final temperature = 775.0K

Now put all the given values in this formula, we get

\log (\frac{6.1\times 10^{-8}}{K_2})=\frac{262000}{2.303\times 8.314J/mole.K}[\frac{1}{600.0K}-\frac{1}{775.0K}]

\log (\frac{6.1\times 10^{-8}s^}{K_2})=5.150

(\frac{6.1\times 10^{-8}}{K_2})=141253.8

Therefore, the value of the rate constant at 775.0 K is 4.3\times 10^{-13}s^{-1}

5 0
2 years ago
How many moles of hydrogen molecules (h2) would be required to produce two moles of hydrogen peroxide (h2o2)?
SashulF [63]
Their should be two molecules of hydrogen (h2) to produce 2 moles of h2O2
3 0
3 years ago
Electrochemistry might be considered a subspecialty of which of the following areas of chemistry
riadik2000 [5.3K]
Hey there!

<span> Electrochemistry might be considered a subspecialty of which of the following areas of chemistry?

Answer: </span>
<span>D. Organic chemistry

Hope this helps
Have a great day (:
</span>
3 0
3 years ago
????????????????????????????
aliina [53]

Answer:

<h2>The answer you are looking for is (B)</h2>

Explanation:

hope this helps

<h2>please mark as brainliest!!!</h2>
8 0
3 years ago
Read 2 more answers
The direction of movement of the cold front shown in the figure at left is _____.
Mice21 [21]

Answer:

northwest

Explanation:

Cmon man adleast try before you ask it on brainly or else you will never get any smarter

7 0
3 years ago
Read 2 more answers
Other questions:
  • Consider three 10-g samples of water: one as ice, one as liquid, and one as vapor. how do the volumes of these three samples com
    11·1 answer
  • How does the way a buffer stabilizes ph during addition of acid differ from the way the same buffer stabilizes ph during additio
    6·2 answers
  • Cobalt III hydroxide and nitric acid react according to the following balanced equation:
    7·1 answer
  • It is possible to prepare ethanol by nucleophilic substitution. For an electrophile, you could choose EtCl, EtBr, or EtI; for a
    9·1 answer
  • Many antacids contain solid calcium carbonate. Explain how antacids with calcium carbonate function.
    13·2 answers
  • Balancea las siguientes ecuaciones por el método de redox. Determina el
    8·1 answer
  • What are the coefficients that will balance the skeleton equation below?
    13·1 answer
  • 2. The two naturally occurring isotopes of hydrogen are hydrogen-1 ( 1.00783 amu; 99.9885 percent) and hydrogen-2 (2.01410 amu;
    13·1 answer
  • Write a balanced equation for rusting. (Assume rust becomes Fe+2)
    8·1 answer
  • Which of the following are used to make predictions?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!