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
tatuchka [14]
3 years ago
15

What methods do scientists use to determine if a change was physical or chemical?

Chemistry
1 answer:
Bess [88]3 years ago
5 0
A physical change will not change the chemical make-up of the material. the change will not produce a new substance.

a chemical change will have a reaction that produces heat, light, a change in color, releases a gas, or rust
You might be interested in
The molar mass of the compound was found to be 30.069 g/mol. what is the molecular formula? express your answer as a chemical fo
kodGreya [7K]

For us to accurately determine what compound this is, additional info must be given. However I can suggest two compounds which have molecular mass of about 30.07 g/mol.

1. It could be NO or nitric oxide.

The molecular mass is 16 + 14= 30 g/mol

But if we search the exact weight, it is 30.01 g/mol

 

2. It could also be (CH3)2  or ethane.

The molecular mass is 2*12+ 6*1= 30 g/mol

But if we search the exact weight, it is 30.07 g/mol.

 

<span>So we could say it more likely to to be (CH3)2 </span>

6 0
3 years ago
What are the limitations of Bronsted-Lowery concept???
HACTEHA [7]

Answer:

There is no limitation at all because that is the basic theory of solution electrolysis

3 0
4 years ago
Read 2 more answers
Which scientist is known for developing the planetary model of the atom
xenn [34]

Answer:

Ernest Rutherford

Explanation:

The Rutherford model, proposed originally in 1911, dipicts a planetary model of the atom in which there is a nucleus and electrons circling it.

7 0
3 years ago
What protects the Earth from meteorites and the sun's rays? (4 points)
inna [77]
I believe the answer is D. The atmosphere, different layers of the atmosphere can help in different ways! The stratosphere helps protect us from the sun's rays; The Mesophere is what helps protect us from meteorites! It's so cold that they burn up in that area.
5 0
3 years ago
If 400 Joules of work is done in 20 seconds, how much power was generated?
Sonbull [250]
To work this out you do 400÷20=20
5 0
3 years ago
Other questions:
  • What does pure substance mean in chemistry?
    9·1 answer
  • For the reaction c6h12o6 + 6h2o’ how many liters of co2 are produced when 126 g of c6h12o6 completely reacts with oxygen
    9·1 answer
  • What mass of oxygen is required to produce 8.0g of magnesium oxide from 4.8g if magnesium
    14·2 answers
  • Low tides occur when a coastline is located within a tidal bulge.
    15·2 answers
  • What is the Lewis dot structure for magnesium fluoride?
    14·1 answer
  • What kind of rocks are formed by the precipitation of calcium carbonate (CaCO3) from sea water? Select all that apply.
    12·1 answer
  • What is the freezing point of a 2.00 m solution with phenol as<br> the solvent?
    15·1 answer
  • Suppose three neutrons are released when an atom in a sample of fissionable nuclei undergoes fission. Each of these neutrons has
    10·1 answer
  • Why does a doctor check your lymph nodes when you are sick?
    8·1 answer
  • How does a graph show a runner at rest?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!