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
AnnyKZ [126]
2 years ago
15

What is the enthalpy in KJ of reaction for the initial combustion if the delta H for vaporization is 75.75 KJ and the net delta

H is -700 kJ?
Write your answer to hundredths, including a negative sign if needed. Do not write the unit.
Chemistry
1 answer:
Gnesinka [82]2 years ago
4 0

Answer:

-775.75

Explanation:

You might be interested in
Poseen ocho, electrones de valencia, exepto el helio que tiene solo dos. Estan ubicados en el grupo VIIIA o 18. Son conocidos ta
Salsk061 [2.6K]

Answer:

c

Explanation:

5 0
3 years ago
The combustion of hydrogen gas releases 286 kJ per mol of hydrogen. If 13.0 L of hydrogen at STP was burned to produce electrici
photoshop1234 [79]

Combustion of hydrogen produces electricity:

It would power a 100-watt (W) light bulb in 27.66 min.

Calculation:

At STP conditions, we know that 1 mole of any gas is contained in 22.4L.

So let's make the operation:

The volume of one mole of gas at STP is 22.4 L

Then, 13.0 L may be the volume for (13.0) /22.4  = 0.58 moles.

The total energy is released = 0.58 x 286 kJ

Total energy = 165.98 kJ

Energy = Power x time

Time = energy / power

where power = 100W = 100 J/s

Therefore, Time = 165.98 kJ/ 100J/s = 1659.8 sec

Time = 1659.8 sec / 60 min = 27.66 min

∴ Time = 27.66 min

Learn more about combustion here,

brainly.com/question/13746752

#SPJ4

5 0
2 years ago
What is the best classification for this sample of crude oil?
Nata [24]
Its have a classification of light and heavy crude oil
6 0
2 years ago
Read 2 more answers
How many grams are there in a 14.5 moles lithium permanganate
frutty [35]

There are 1825.6 g in a 14.5 moles Lithium permanganate

<h3> Further explanation</h3>

The mole is the number of particles(molecules, atoms, ions) contained in a substance  

1 mol = 6.02.10²³ particles

Can be formulated

N=n x No

N = number of particles

n = mol

No = Avogadro's = 6.02.10²³

Moles can also be determined from the amount of substance mass and its molar mass :

\tt mol=\dfrac{mass}{MW}

moles of Lithium permanganate = 14.5

Lithium permanganate (LiMnO4) MW=125.9 g/mol, so mass :

\tt mass=mol\times MW\\\\mass=14.5\times 125.9~g/mol\\\\mass=1825.6~g

5 0
3 years ago
What is the temperature, in degrees Celsius, of a substance with a temperature of 49K? –322°C –224°C 224°C 322°C
vichka [17]

Answer:

-224ºC

Explanation:

4 0
2 years ago
Other questions:
  • How does the scientific process generally begin
    6·1 answer
  • What is iridium iii phosphate monohydrate chemical formula
    9·2 answers
  • How is a cell membrane different from a cell wall
    9·2 answers
  • What are 3 things that microwaves do
    12·1 answer
  • What is the SI unit of pressure and from what units is it derived
    5·1 answer
  • Help me please? I don't understand
    14·1 answer
  • Which change occurs when a barium atom loses two electrons?(1) It becomes a negative ion and its radius decreases.(2) It becomes
    14·2 answers
  • Complete the passage.
    9·2 answers
  • 9. A helium-filled balloon has a volume of 50.0 L at 25°C and 820.8mmHg atm. What pressure will it have
    11·1 answer
  • Uranium is classified as what type of element?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!