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
Lena [83]
3 years ago
10

Given the following information:Br2 bond energy = 193 kJ/mol F2 bond energy = 154 kJ/mol 1/2Br2(g) + 3/2F2(g) -> BrF3(g) = –3

84 kJ/mol calculate the Br-F bond energy. A)244 kJ/molB)237 kJ/molC)712 kJ/molD)128 kJ/molE)none of these
Chemistry
1 answer:
arlik [135]3 years ago
8 0

Answer:

C) 712 KJ/mol

Explanation:

  • ΔH°r = Σ Eb broken - Σ Eb formed
  • 1/2Br2(g) + 3/2F2(g) → BrF3(g)

∴ ΔH°r = - 384 KJ/mol

∴ Br2 Eb = 193 KJ/mol

∴ F2 Eb = 154 KJ/mol

⇒ Σ Eb broken = (1/2)(Br-Br) + (3/2)(F-F)

⇒ Σ Eb broken =  (1/2)(193 KJ/mol) + (3/2)(154 KJ/mol) = 327.5 KJ/mol

∴ Eb formed: Br-F

⇒ Σ Eb formed (Br-F) = Σ Eb broken - ΔH°r

⇒ Eb (Br-F) = 327.5 KJ/mol - ( - 384 KJ/mol )

⇒ Eb Br-F = 327.5 KJ/mol + 384 KJ/mol = 711.5 KJ/mol ≅ 712 KJ/mol

You might be interested in
The pk1, pk2, and pkr for the amino acid glutamate are 2.1, 9.5, and 4.1, respectively. at ph 11.0, glutamate would be charged p
vfiekz [6]
There are no answer choices
8 0
3 years ago
What mass of oxygen (O2) forms in a reaction that forms 15.90 g C6H12O6? (Molar mass of O2 = 32.00 g/mol; molar mass of C6H12O6
Dafna11 [192]

The answer is: the mass of oxygen is 16.95 grams.

The overall balanced photosynthesis reaction:  

6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂.  

m(C₆H₁₂O₆) = 15.90 g; mass of glucose.

n(C₆H₁₂O₆) = m(C₆H₁₂O₆) ÷ M(C₆H₁₂O₆).

n(C₆H₁₂O₆) = 15.9 g ÷ 180.18 g/mol.

n(C₆H₁₂O₆) = 0.088 mol; amount of glucose.

From chemical reaction: n(C₆H₁₂O₆) : n(O₂) = 1 : 6.

n(O₂) = 6 · 0.088 mol.

n(O₂) = 0.53 mol; amount of oxygen.

m(O₂) = 0.53 mol · 32.00 g/mol.

m(O₂) = 16.95 g; mass of oxygen.

5 0
3 years ago
Read 2 more answers
A uranium atom has 92 protons in its nucleus. how many electrons does it have?
sweet [91]
In a balanced, non-charged atom, the number of protons (positive charge) is equal to the number of electrons (negative charge)

So there are 92 electrons
4 0
3 years ago
Read 2 more answers
A mixture of oxygen hydrogen and nitrogen gas is exerts a total pressure of 282K PA if the partial pressures of oxygen and hydro
sergiy2304 [10]
Glgggggggggggggggggggggggg
7 0
3 years ago
Read 2 more answers
When two hydrogen atoms combine with one oxygen atom, what is the result?
vitfil [10]

Answer:

solution

Explanation:

hope i helped

4 0
2 years ago
Read 2 more answers
Other questions:
  • Emissions of sulfur dioxide by industry set off chemical changes in the atmosphere that result in "acid rain". The acidity of li
    13·1 answer
  • Would a change in shape or phase be both a physical and chemical change?
    8·1 answer
  • Organic formula for phenol
    10·1 answer
  • How many milliliters of 2.0M Mg(OH)2 are required to neutralize 250.0 ml of 0.80M hydrochloric acid (HCl)?
    10·1 answer
  • Explain distillation and chromatography
    7·1 answer
  • What do the colors produced by fireworks indicate?
    14·1 answer
  • Explique las diferencias entre mezcla y combinación. De un ejemplo de cada uno.
    11·1 answer
  • I need helppppp<br> I need to pass this test
    12·1 answer
  • A(n) _____, used as part of the stationary phase, has an affinity for the solvent and the chemical components of the mixture. ad
    13·1 answer
  • What is the hydronium and hydroxide concentrations of a solution that is 5.0 x 10-3 M H2SO4.
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!