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]
3 years ago
8

Which statement describes the energy changes that occur as bonds are broken and formed during a chemical reaction? 1.Energy is a

bsorbed when bonds are both broken and formed. 2.Energy is released when bonds are both broken and formed. 3.Energy is absorbed when bonds are broken, and energy is released when bonds are formed. 4.Energy is released when bonds are broken, and energy is absorbed when bonds are formed.
Chemistry
1 answer:
Snowcat [4.5K]3 years ago
6 0

Answer:

C

Explanation:

Br + Br-> Br2 (covalent bond)

bond formation releases energy, as the Br's are in a lower energy state like Br2

You might be interested in
How many moles of aluminum are needed to react completely with 1.2 mol of feo
Amanda [17]

Answer:

0.8 mol.

Explanation:

  • The balanced equation for the reaction between Al and FeO is represented as:

<em>2Al + 3FeO → 3Fe + Al₂O₃,</em>

It is clear that 2 mol of Al react with 3 mol of FeO to produce 3 mol of Fe and 1 mol of Al₂O₃.

<em><u>Using cross multiplication:</u></em>

2 mol of Al needs → 3 mol of FeO, from stichiometry.

??? mol of Al needs → 1.2 mol of FeO.

∴<em> The no. of moles of Al are needed to react completely with 1.2 mol of FeO </em>= (2 mol)(1.2 mol)/(3 mol) = <em>0.8 mol.</em>

3 0
3 years ago
What is in the nucleus of an atom?
lora16 [44]

Answer:

energy??????????????

5 0
2 years ago
Read 2 more answers
A silicon atom has an atomic number of 14. What information does the atomic number tell you? (Choose all possible answers)
Bezzdna [24]

Answer:

Silicon atoms have 14 protons.

Silicon atoms will react with other atoms in order to gain stability.

Silicon atoms have 14 electrons.

5 0
3 years ago
Molecules in 2 moles of carbon dioxide<br>​
Maksim231197 [3]

Answer:

HAVE A NICE DAY OK

I GOT UR ANSWER

5 0
2 years ago
Please help quickly i have exam
katrin [286]

Answer:

ALL EXCEPT

"O and S" and "F and Cl"

7 0
2 years ago
Other questions:
  • Why is regulation of the cell cycle important?
    12·1 answer
  • What is a chemical change and what is a chemical property? Give Example.
    10·2 answers
  • A 3.00 g sample of unknown hydrocarbon is prepared for combustion analysis. after the hydrocarbon undergoes complete combustion,
    13·1 answer
  • True or False ? Endothermic reactions are characterized by net absorption of thermal energy from its surroundings which leads to
    8·1 answer
  • If you add heat to a solid, the particles will... (choose all that apply) *
    9·1 answer
  • En relación a la escala de ph se puede decir lo siguiente: I. Mientras más cerca del 8 la sustancia es más básica II. El papel t
    14·1 answer
  • What form of energy that is produced at an earthquake's point of origin and travels outward?
    15·2 answers
  • A student says: Potassium (K) always has 20 protons. Explain why the student is incorrect.
    15·1 answer
  • Mars
    12·1 answer
  • Which of the following is an oxidation-reduction reaction?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!