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
Eva8 [605]
3 years ago
14

What are 3 signs that a chemical reaction is happening, what tells you that this is definitely a chemical reaction?

Chemistry
1 answer:
Charra [1.4K]3 years ago
8 0
Produces heat, putting off air or bubbles and changes the smell or odor it changes the state that’s how you know it is a chemical reaction
You might be interested in
What do chemists measure concentration with?
solniwko [45]
How to calcutate concentration of solution.
there is 12gram of solute in a 36 gram solution
then you take 12 divided by 24 because 36-12=24 which is youe solvent
8 0
3 years ago
Read 2 more answers
The temperature in a town started out at 55 degrees. By the end of the day the temperature dropped to -6 degrees.
garik1379 [7]

Answer:

The choice of the answer is fourth option that is -61 degrees.

Therefore the temperature drop is -61°Centigrade.

Explanation:

Given:

The temperature in a town started out at 55 degrees

Start temperature = 55°Centigrade. (Initial temperature)

End of the Day      = -6°Centigrade. (Final temperature)

To Find:

How far did the temperature drop?

Solution:

We will have,

\textrm{Temperature drop}=\textrm{Final temperature}-\textrm{Initial temperature}

Substituting the above values in it we get

\textrm{Temperature drop}=-6-55\\\\\therefore \textrm{Temperature drop}=-61\° centigrade

Therefore the temperature drop is -61°Centigrade.

4 0
3 years ago
PLZ HELP!
il63 [147K]
LightWave. Lightwave forms the most important example of a transverse wave!
5 0
3 years ago
Read 2 more answers
Why didn't you just clean the spill with water?
Allisa [31]

Answer:

if you did it would probably make it bigger...

Explanation:

:)

3 0
3 years ago
I NEED HELP ASAP !
Lana71 [14]

Answer:

1.

643.21g  1 mol  6.022^23

262.87 g   1 mol

= 1.4735E24     [Mg3(PO4)2]

2.

4.061x10^24          1mol                22.4 (L)  

6.022^23       1mol

= 151 liters H2O2

3.

479.3g   1 mol   6.022^23

18.02g    1mol

= 1.60E25 H20 atoms

4.

80.34L   1mol       164.1

22.4L       1mol

588.6g   Ca(NO3)2

5.

893.7g   1mol       22.4

44.01g   1mol

= 427 L CO2 or 427.4

6.

5.39 x 10^25     1mol     78.01

6.022^23    1mol

= 6980g Al(OH)3

hope this helps!! :)

8 0
3 years ago
Other questions:
  • When 26.62 miles of FeS2 reacts with 5.44 miles of O2 how many miles of SO2 are formed
    14·1 answer
  • Warm water rising to the surface of the
    9·1 answer
  • 31) To extend a length of 1.00 inches, 2.54 x 10^8 average sized atoms would have to be placed in a straight line (in other word
    10·1 answer
  • I’d appreciate the help! :)
    5·1 answer
  • Antimony pentafluoride has a formula of SbF5. What is the percent composition of Sb in this molecule
    15·1 answer
  • How are sodium (Na) and potassium (K) similar?
    6·2 answers
  • A blacksmith partners with a team of chemistry and physics graduate students to
    10·2 answers
  • Food scientists apply principles of titrations to food testing and develop foods that meet certain food-safety standards. For ex
    7·2 answers
  • 4)
    15·1 answer
  • Why might an earthquake have more than one intensity value
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!