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
wolverine [178]
3 years ago
9

Consider the reaction: 2clf3(g) + 2nh3(g) → n2(g) + 6hf(g) + cl2(g) when calculating the δh°rxn, why is the δhf° for n2 not impo

rtant?
Chemistry
1 answer:
Leni [432]3 years ago
8 0

<span>Actually, the heat of reaction hrxn s calculated by taking the sum of the heats of formation of the products minus the sum of the heats of formation of the reactants. However, at heat of formations of pure elements at atmospheric conditions is zero, therefore the hf of N2 is not important since it is zero anyway.</span>

You might be interested in
A gas has a volume of 5.0 L at a pressure of 50 KPa. What happens to the volume when the pressure is increased to 125?
Alexeev081 [22]
The volume becomes two. You have to use the equation P1 x V1 = P2 x V2 
P is pressure and V is volume.
P1 = 50     P2 = 125
V1 = 5       V2 = v (we don't know what it is)
Then set up the equation:
50 times 5 = 125 times v
250 = 125v
the divide both sides by 125 and isolate v
2 = v
Therefore the volume is decreased to 2.
Also, Boyle's Law explains this too: Volume and pressure are inversely related, This means that when one goes up the other goes down (ie when pressure increases volume decreases and vice versa). Becuase the pressure went up from 50 KPa tp 125 KPa the volume had to decrease.

7 0
3 years ago
Hi, my question is not answer, please
Oksanka [162]
Okay, pls give brainliest because I answered the fastest and how are you?
4 0
3 years ago
Please help, will give the brainiest answer
iren2701 [21]

Answer:

Ag+Nano3 yes

MN + Cao.?No

8 0
2 years ago
Which scientist arranged the elements in order of increasing atomic number, rather than increasing atomic mass? Antoine Lavoisie
Natalka [10]
The answer is Henry Moseley
6 0
3 years ago
Read 2 more answers
A sample of oxygen occupied 626 mL when the pressure increased to 874.27 mm Hg. At constant temperature, what volume did the gas
Usimov [2.4K]

Answer:

709 (With sig figs)

Explanation:

Pressure(1) * volume(1) = Pressure(2) * volume(2)

771.75 mm Hg * unknown = 874.27 mm Hg * 626 mL

771.75 mm Hg * unknown = 547,293.02 mm Hg*mL

   Divide both sides by 771.75 mm Hg

Unknown = 709 (With sig figs)....709.158432 (without sig figs)

4 0
2 years ago
Other questions:
  • Which of the following is true regarding the inner transition elements? A. These include all elements in groups 3–12. B. They oc
    12·2 answers
  • In monostremes the placenta absors oxygen and food from the mothers blood.
    14·1 answer
  • Which law states that the volume of a gas is proportional to the moles of the gas when pressure and temperature are kept constan
    8·2 answers
  • A lab technician has 45L gas in a flexible container at a pressure of 100.0 kPa. If the technician decreases the pressure to 60.
    7·1 answer
  • Six Carnot engines operating between different hot and cold reservoirs are described below. The heat energy transferred to the g
    13·1 answer
  • 4. Explain why 50 g of liquid water at 0°C heats-up more quickly than 50 g of an ice water mixture at 0°C under the same conditi
    13·1 answer
  • Rate = K[A]
    7·1 answer
  • Write the electron configuration when Sulfur gains two electrons
    10·1 answer
  • I need help on science lol
    11·2 answers
  • For 20 points.... answer this
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!