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
schepotkina [342]
3 years ago
14

Can anyone explain this to me?

Chemistry
1 answer:
Kipish [7]3 years ago
5 0
The answer is D, the definition of standard enthalpy of formation is as follows: when one mole of a substance in the standard state (1 atm of pressure and 298.15 K) is formed from its pure elements. The last two words being especially important to this question. We would rule out A, B and C all because the product is formed from a mixture of an element and a compound and not just of elements. In other questions the reactants may all be in elemental form so you must look at the products being one mole or the reactants not being in their standard state.
You might be interested in
Is science logical please help meeeeeee
atroni [7]

Answer:

It kind of is logical so my answer is yes

6 0
3 years ago
Read 2 more answers
Why is most of the Earth’s fresh water unavailable?
lisov135 [29]

Answer:

2.5% of the earth's fresh water is unavailable: locked up in glaciers, polar ice caps, atmosphere, and soil; highly polluted; or lies too far under the earth's surface to be extracted at an affordable cost.

Explanation:

3 0
3 years ago
What is the wavelength, in nm, of the light photon emitted by a hydrogen atom when an electron goes from n
xxMikexx [17]

Answer:

Hence, the wavelength of the photon associated is 1282 nm.

Explanation:

8 0
2 years ago
Earth rotates once every 24 hours. What does this mean?
prohojiy [21]
B- Earth completes a full spin on its axis once every 24 hours.
6 0
3 years ago
How many glucose molecules can be produced per second in a plant
Masja [62]
Since glycolysis of one glucose molecule generates two acetyl CoA molecules, the reactions in the glycolytic pathway and citric acid cycle produce six CO2 molecules, 10 NADH molecules, and two FADH2 molecules per glucose molecule
3 0
3 years ago
Other questions:
  • Which method would be the best to use in order to separate a mixture of water and rubbing alcohol?
    11·1 answer
  • How many fluorine atoms are present in 5.85 g of c2f4?
    6·1 answer
  • Which sentence describes one characteristic of nonmetals? Nonmetals are often brittle solids. Nonmetals are often malleable. Non
    7·1 answer
  • Determine the electron geometry (eg) and molecular geometry (mg) of <img src="https://tex.z-dn.net/?f=CH_3%5E%2B" id="TexFormula
    15·1 answer
  • Draw a Lewis structure for BCl3 and answer the following questions based on your drawing.
    9·1 answer
  • Using the information in the table to the right, calculate the enthalpy of combustion of each of the following substances:
    7·1 answer
  • Why can’t cold air hold much water vapor?
    15·1 answer
  • Ar
    15·1 answer
  • Give the following for SO2 and BrF5:
    10·1 answer
  • True or False: Different substances, like shortening and soap, will melt at the same temperature. True False​
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!