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
bixtya [17]
2 years ago
9

Please answer! Will receive brainliest

Chemistry
1 answer:
Cloud [144]2 years ago
4 0
Coefficient for KOH is 6
You might be interested in
Use bond energies to calculate ΔHrxn Δ H r x n for the reaction. 2H2(g)+O2(g)→2H2O(g) 2 H 2 ( g ) + O 2 ( g ) → 2 H 2 O ( g )
Olenka [21]

Answer:

\large \boxed{\text{-486 kJ}}

Explanation:

You calculate the energy required to break all the bonds in the reactants.

Then you subtract the energy needed to break all the bonds in the products.

                      2H₂   +   O₂ ⟶ 2H-O-H

Bonds:          2H-H    1O=O       4H-O

D/kJ·mol⁻¹:     436      498          464

\begin{array}{rcl}\Delta H & = & \sum{mD_{\text{reactants}}} - \sum{nD_{\text{products}}}\\& = & 2 \times 436 +1 \times 498 - 4 \times 464\\&=& 1370 - 1856\\&=&\textbf{-486 kJ}\\\end{array}\\\text{The enthalpy of reaction is $\large \boxed{\textbf{-486 kJ}}$}.

3 0
2 years ago
Which Reference Tables must be used to determine the number of carbon atoms in a parent chain and the type of bonding between th
777dan777 [17]

Answer:

Explanation:

Did you get the answer to the test, I have the same one but don’t understand the questions that well

4 0
3 years ago
Help it's science so help
bija089 [108]
1.b
2.b
3.a
 3 was the the opposite of the scenario stated   

 
7 0
3 years ago
Name the following <br> Cr(SO4)2
inessss [21]
Chromium sulfate.
Cr is chromium, and SO4 is sulfate.
3 0
3 years ago
What is Artificial selection???
kati45 [8]

Answer:

The process of selection conducted under human direction.

Explanation:

For example, by allowing only like individuals to breed, breeders have created the great variety of dog breeds and crop plants

7 0
2 years ago
Other questions:
  • What is the actual amount of phosphorous in a fertilizer with a NPK ratio of 15-15-20?
    12·1 answer
  • Under laboratory conditions of 25.0 degrees C and 99.5 kPa, what is the maximum number of liters of ammonia that could be produc
    11·1 answer
  • How many molecules of co2 are equivalent to 112g of CO2
    6·2 answers
  • The speed of light in a vacuum is constant. If the frequency of a light wave increases, what happens to the wavelength of the li
    8·1 answer
  • A sample of i-131 decays from 12 microcuries to 3.0 microcuries in 16 days. what is the half-life of i-131?
    11·1 answer
  • Which of the following processes is spontaneous?
    13·2 answers
  • What is the molar mass of al (clo2)3
    8·1 answer
  • View the video clip below and answer the question.
    15·2 answers
  • 10. What two effects can the wrong pH have on an enzyme?
    14·1 answer
  • Th ph value of milk is close to
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!