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
What color does blue brown and red make
photoshop1234 [79]

Answer:

dark brown with a hint of purple

have a good day :)

Explanation:

7 0
3 years ago
A fruit and oatmeal bar contains 142 nutritional calories. Convert this energy to calories
Alekssandra [29.7K]
Answer is: a<span> fruit and oatmeal bar contains 142000 calories.
</span>A nutritional calorie<span>, or kilocalorie, is equal to 1000 calories.
</span>E = 142 kcal · 1000 cal/kcal.
E = 142 000 cal.
Calorie (cal)<span>, or small calorie, is the amount of energy needed to heat one gram of water by one degree Celsius.
</span><span>One small calorie is approximately 4.2 joules.
</span>A calorie is a unit of energy.
8 0
3 years ago
Help, and fast! I really need an answer to this.
Travka [436]

Answer:

Explanation:says these bars are like co vid i get em right off teh bat

8 0
3 years ago
In which part of the cell is the majority of the energy released from the breakdown of glucose
Vladimir [108]

<em>Answer</em><em>:</em>

<em>Glycolysis</em>

<em>E</em><em>xplanation</em><em> </em><em>:</em>

Glycolysis is the first step in the breakdown of glucose to extract energy for cell metabolism.Many living organisms carry out glycolysis as part of their metabolism. Glycolysis takes place in the cytoplasm of most prokaryotic and all eukaryotic cells.

7 0
3 years ago
Read 2 more answers
Consider the following reaction mechanism:
snow_lady [41]

Answer:

  • <em><u>Step 2 (the slow step).</u></em>

Explanation:

The rate-determining step is always the slow step of a mechanism.

That is so, because it is the slow step which limits the reaction.

Imaging that for assembling a toy you have process of three steps:

  • 1. order ten pieces, which you can do in 1 minute: meaning that you can order order the pieces for 60/1 = 60 toys in 1 hour.

  • 2. glue the pieces and hold the toy until the glue hardens, which takes 1 hour: meaning finishingh 1 toy in 1 hour.

  • 3. pack the toy, which takes 2 minutes: meaning that you can pack 60/2 = 30 toys in one hour.

The time to glue and hold one toy until the glue hardens determines that you can assemble 1 toy in 1 hour and not 60 toys or 30 toys.

Thus, the step that determines the rate at which the reaction happens is the slowest step: step 2.

3 0
3 years ago
Read 2 more answers
Other questions:
  • 1. Scientists are concerned about the global temperature rise, the increase in CO2 in our atmosphere, the melting glaciers and o
    13·1 answer
  • 9. The major human causes of extinction today are
    13·1 answer
  • When hot lava reaches seawater, the salts in the water react with the steam to form gaseous hydrochloride acid. You are given a
    11·1 answer
  • Scientists carried out an experiment with flowers from plant X and found out that within three minutes of exposure to the sound
    14·1 answer
  • How many grams of CO2 would be made from 3.0 g of C6H6? Please no links
    13·1 answer
  • How many Group 17 elements are in Period 3 of the Periodic Table? A) 1 B) 2 C) 3 D) 4
    6·1 answer
  • What type of soil has the finest of all the soil particles, measuring fewer than 0.002 millimeters in size?
    8·1 answer
  • in 4 season countries, the temperatire may drop till below 0°c during the peak of winter. why does the surface of the river or l
    5·1 answer
  • How make carbon dioxide ​
    10·1 answer
  • When looking at a chemical reaction, the substance present before the reaction takes place are called the (5) and the substance
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!