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
bogdanovich [222]
4 years ago
11

Given the balanced equation: 4Fe(s) + 30₂(g) → 2Fe₂O₃(s) + 1640 kJ Which phrase best describes this reaction?

Chemistry
1 answer:
Troyanec [42]4 years ago
3 0

Answer:

yeah the answer under the explanation

<em>Explanation:</em>

<em>The answer is (4) exothermic with ΔH = -1640 kJ. The 1640 kJ energy is at the right side of equation means that it releases energy. The enthalpy change means the energy of production minus the energy of reactants. If it is exothermic, the ΔH < 0.</em>

You might be interested in
(100 POINTS) WILL MARK BRAINLIEST
frosja888 [35]

Answer:

the first option is the correct answer

7 0
2 years ago
The sulfur dioxide (so2) stack-gas concentration from fossil-fuel combustion is 12 ppmv. determine the stack-gas so2 concentrati
sergejj [24]

The concentration of SO_{2} in the stack gas = 12 ppmv

That means 12 L of  SO_{2} is present per 10^{6} L gas

The given temperature is 273 K (0 C) and pressure is 1 atm. At these conditions, 1 mol of gas would occupy,

PV = nRT

(1 atm) (V) = (1 mol)(0.08206\frac{L.atm}{mol.K}) (273 K)

V = 22.4 L

1 mol SO_{2} occupies 22.4 L

Moles of SO_{2} = 12 L *\frac{1 mol}{22.4 L} = 0.5357 mol SO_{2}

Mass of  SO_{2} =0.5357 mol *\frac{64.06 g}{1 mol}  = 34.32 g SO_{2}  *\frac{10^{6} microgram}{1 g} =3.432 *10^{7}μg

Converting 10^{6} L to m^{3}:

10^{6} L *\frac{1 m^{3}}{1000 L} = 10^{3}   m^{3}

Calculating the concentration in μg/m^{3}:

\frac{3.432 * 10^{7} microgram}{10^{3} L}    = 3.432 * 10^{4}  microgram/m^{3}

3 0
3 years ago
Hợp chất A công thức có dạng SxOy biết tỉ lệ khối lượng S:O=16:24. Tìm công thức của A
lord [1]

Answer:

SO3

Explanation:

mS/ mO = 32x/16y = 16/24

x/y = 1/3

4 0
3 years ago
Among the following scenarios, which best demonstrates resilience when confronted with stress?
Valentin [98]
B. Everyone else aren't trying to grow, they only complain.
8 0
3 years ago
What is the frequency of this wave?<br><br> 1<br> 2<br> 3<br> 4
lilavasa [31]
Hey it is 
2

hope l helped
3 0
3 years ago
Read 2 more answers
Other questions:
  • Which came first M or O
    15·1 answer
  • Changing in boiling point is directly proportional to the ____.
    15·2 answers
  • H A and H B are both weak acids in water, and HA is a stronger acid than HB. Which of the following statements is correct? Selec
    14·1 answer
  • What is the volume of an object whose dimensions are 5.54 cm, 10.6 cm, and 199 cm? Round your answer to the correct number of si
    7·1 answer
  • Which atom is oxidized in the reaction of benzhydrol with bleach? redraw the structures and indicate the oxidation number of tha
    10·1 answer
  • The term used to describe the Doppler shift in wavelength of light emitted by a star moving away from the Earth is:
    6·1 answer
  • 14 points!!! Pls tell me answer :3
    7·2 answers
  • I need this question ASAP please
    9·1 answer
  • 1) A box has a mass of 8 kg and a volume of 2 m? What is its density? |
    7·1 answer
  • At what temperature would the volume of a gas be equal to 45.7 L, if the volume of that gas was 33.9 L at 12.4ºC? 241.9 K 241.9
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!