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
artcher [175]
3 years ago
11

What are two ways to tell if a chemical reaction is taking place?

Chemistry
2 answers:
lorasvet [3.4K]3 years ago
6 0
A chemical reaction is observed by physical effects that cannot be undone, for Ex. If an object give off heat or light, thats a chemical reaction. If theirs a change in an objects color it can be a chemical reaction, like rust. Metal turning silver to brown. <span />
Kruka [31]3 years ago
4 0
1) temperature change
2)odor or smell change
Hope this helps
You might be interested in
What is the BEST definition for friction?
NARA [144]
Hello
    

                         its me


and alsooo


                                                         the awnser is



number 3 lol
4 0
2 years ago
Match the correct definition with the correct term from questions 10-13: A. Internal energy B. Latent heat C. Chemical (bond) en
Marizza181 [45]

Answer:  A. Internal energy : May be viewed as the sum of the kinetic and potential energies of the molecules

B. Latent heat: The internal energy associated with the phase of a system.

C. Chemical (bond) energy : The internal energy associated with the atomic bonds in a molecule

D. Nuclear energy : The internal energy associated with the bonds within the nucleus of the atom itself

Explanation:

Internal energy is defined as the total energy of a closed system. Internal energy is the sum of potential energy of the system and the kinetic energy of the system. It is represented by symbol U.

Latent heat is the thermal energy released or absorbed by a thermodynamic system when the temperature of the system does not change. It is thus also called as hidden heat.

Chemical energy is the energy stored in the bonds of molecules.

Nuclear energy is the energy which is stored in the nucleus of an atom called as binding energy within protons and neutrons.

5 0
2 years ago
A substance has half the number of particles as 12 grams of carbon 12, how many moles are in the substance?
gavmur [86]

the molar mass is how many grams it takes to make a full mole.  The number  in carbon 12 tells us that it takes 12 g to makes a mole, so one half of that would be <u><em>option d, 0.5</em></u>.  

7 0
2 years ago
Read 2 more answers
What is the acronym for ribonucleic acid?
Masteriza [31]
The acronym is RNA. Ribo Nucleic Acid
4 0
3 years ago
In what way are liquids different from solids?
Vladimir79 [104]

Answer:

a. Liquids do not have a fixed shape; solids do

Explanation:

I’m really sorry thats the only one I for sure know that is true...

5 0
3 years ago
Read 2 more answers
Other questions:
  • A chemical equation that does not indicate relative amounts of reactants and products is called
    9·1 answer
  • Which of the following does NOT indicate that a chemical change may have taken place?
    9·2 answers
  • The rate of the reaction is ?
    10·2 answers
  • C2 H6 +02 equals CO2 + H2O what mass of water is produced from three moles of C2 H6?
    9·1 answer
  • When 0.491 grams of a protein were dissolved in 44 mL of benzene at 24.4 degrees C, the osmotic pressure was found to be 50.9 to
    10·1 answer
  • An animal skeleton has a carbon-14 decay rate of 13.1 disintegrations per minute per gram of carbon. When did the animal die? (A
    13·1 answer
  • What is a climograph
    11·1 answer
  • How many moles are in 3.72 x 10^27 atoms of iron?
    9·1 answer
  • Which orbital has the highest energy level
    11·1 answer
  • describe how to put a food you enjoy such as hamburger pizza or muffin identify one physical change that takes place as this foo
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!