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
Why aluminum in 1820 had more value than gold​
bonufazy [111]

Answer:

Aluminum had more value than gold in the 1820s, because it was harder to obtain. Hope this helped :)

4 0
2 years ago
Step I of the proposed mechanism involves the collision between NO2 and F2 molecules. This step is slow even though such collisi
pogonyaev

Answer:

bob

Explanation:

bob

7 0
3 years ago
In the following reaction, how many grams of NaBr will react with 311 grams of Pb(NO3)2?
Mashutka [201]
Molar mass :

NaBr = 103 g/mol

Pb(NO3)2 = 331.20 g/mol

<span><span /><span>Balanced chemical equation :

</span></span>2 NaBr + 1 Pb(NO3)2 = 2 NaNO3 + 1 PbBr<span>2
</span><span>
2*103 g NaBr ------------> 1 * 331.20 g Pb(NO3)2
      g NaBr  -------------------> 311 g Pb(NO3)2

331.20  g  =   2*103*311

331.20 g = 64066

mass ( NaBr ) =  64066 / 331.20

mass ( naBr)  = 193,43 g of NaBr

hope this helps!.


</span>
5 0
3 years ago
From the choices provided below, list the reagent(s) in order that will react with 3-pentanone to form 3-pentanol
Soloha48 [4]

3-pentanone to form 3-pentanol

Here 3-pentanone reacts with H2/Pt  to given 3-pentanol

So here with one step we can convert given ketone to alcohol

The reaction will be


5 0
3 years ago
11. How much magnesium reacts with 12.5g of oxygen to produce 31.5g of 5 points
AfilCa [17]
Your answer should be C.
6 0
3 years ago
Other questions:
  • Is putting food coloring in water a chemical change?
    11·1 answer
  • My topic is baseball heights.
    10·1 answer
  • Aluminum has a density of 2.70 g/cm3. what would be the mass of a sample whose volume is 10.0 cm3?
    13·1 answer
  • Two moles of magnesium and five moles of oxygen are placed in a vessel. When magnesium is ignited ca two moles of magnesium and
    10·1 answer
  • What particle controls the energy of an atom
    12·1 answer
  • How do we observe in experiments?
    15·1 answer
  • Manganese nodules are considered a valuable resource from the ocean floor because they are abundant and contain not only mangane
    15·1 answer
  • Can somebody help me wit dis?
    11·1 answer
  • HCl + Fe + ____ + H²
    14·1 answer
  • At room temperature (20°C) and pressure, the density of air is 1.189 g/L. An object will float in air if its density is less tha
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!