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
denis23 [38]
3 years ago
8

Which is the most important question for deciding if a chemical reaction has occurred?

Chemistry
2 answers:
777dan777 [17]3 years ago
7 0

Answer:

all these are physical properties except release of heat so it's probably heat energy given off

navik [9.2K]3 years ago
4 0

Answer:Was any heat energy given off?

Explanation:

A chemical reaction may exothermic (heat is given off) or endothermic (heat is absorbed). Size, density or texture of the substance are strictly physical properties which cannot confirm that a chemical reaction has transpired in the sample. The evolution of heat ultimately confirms that a chemical process has taken place.

You might be interested in
I have an experiment where I put a balloon into an ice bucket and measure its temperature but the lab says
Pavlova-9 [17]
What does the lab say because then i can help :)

7 0
3 years ago
A desert that contains plants and animals that have been there a long time is<br> an example of
mixas84 [53]
Pioneer Community would that be?
7 0
3 years ago
Dehydration of 2-methyl-2-pentanol forms one major and one minor organic product. Draw the structures of the two organic product
Korvikt [17]

Answer:

The major product is 2-methyl-2-pentene [ CH₃-CH₂-CH=C(CH₃)₂ ] and a minor product 2-methyl-1-pentene [ CH₃-CH₂-CH₂-C(CH₃)=CH₂ ].

Explanation:

Dehydration reaction is a reaction in which a molecule loses a water molecule in the presence of a dehydrating agent like sulfuric acid (H₂SO₄).

<u>Dehydration reaction of 2-methyl-2-pentanol</u> gives a major product 2-methyl-2-pentene and a minor product 2-methyl-1-pentene.

CH₃-CH₂-CH₂-C(CH₃)₂-OH (2-methyl-2-pentanol)→ CH₃-CH₂-CH=C(CH₃)₂ (2-methyl-2-pentene, major) + CH₃-CH₂-CH₂-C(CH₃)=CH₂ (2-methyl-1-pentene, minor)

<u>Since more substituted alkene is more stable than the less substituted alkene. So, the trisubstituted alkene, 2-methyl-2-pentene is more stable than the disubstituted alkene, 2-methyl-1-pentene.</u>

<u>Therefore, the trisubstituted alkene, 2-methyl-2-pentene is the major product and the disubstituted alkene, 2-methyl-1-pentene is the minor product.</u>

7 0
3 years ago
A student determines that she used 0.0665 mol of sodium hydroxide (NaOH) to completely titrate 25.00 mL of sulfuric acid solutio
AysviL [449]

To determine the concentration of one solution which is specifically basic or acidic solution through taking advantage on its points of equivalence, titration analysis is done.

Let us determine the reaction for the titration below:

2NaOH +2H2SO4 = Na2SO4 +2H2O

 

So,

0.0665 mol NaOH (2 mol H2SO4/ 2mol NaOH) / .025 L solution 

= 2.62 M H2SO4


The answer is the fourth option: 

<span>2.62 M</span>
7 0
3 years ago
Read 2 more answers
If a stone with an original velocity of 0 is falling from a ledge and takes 8 seconds to hit the ground what is the final veloci
ziro4ka [17]
Also 0 as it hits the ground and stops
5 0
3 years ago
Other questions:
  • What food would glucose be in
    13·2 answers
  • Without kidneys, your body cannot _____.
    6·1 answer
  • Write a complete chemical formula including physical state symbol for nitrogen
    9·1 answer
  • Aqueous solutions of aluminum sulfate and barium chloride are mixed, resulting in the precipitate formation of barium sulfate wi
    9·1 answer
  • If 35.8 grams of LiCl are dissolved in 184 grams of water, what is the concentration of the solution in percent by mass?
    11·1 answer
  • Complete the unit conversion by entering the correct numbers <br> A=<br> B=<br> C=
    6·1 answer
  • 7. Phosphorus 32 ( 32), a radioactive isotope of phosphorus, has a half-life of 14.2 days. a. If the amount of radioactivity of
    8·1 answer
  • Explain what this graph says
    6·1 answer
  • Why are alloys generally used to make everyday objects?
    8·1 answer
  • Help. I need to finish this in time for school tomorrow
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!