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
Mamont248 [21]
3 years ago
13

If a substance changes from one phase to another, is it still same substance? why

Chemistry
1 answer:
shutvik [7]3 years ago
5 0
When you boil water, you aren't changing the elements. You're just making water vapor. However, when you burn paper, it becomes carbon (mostly). So physical changes will not change the substance, only chemical changes will.
You might be interested in
This flow chart shows the amount of energy that is emitted by each type of light. ultraviolet > blue light > yellow light
harina [27]

Answer:

Explanation:

In photoelectric effect , radiation of some energy is made to fall on metal plate which results in the ejection of electrons by the metal plate . The kinetic energy of electrons comes from the energy of radiation falling on metal plate . Some of energy of radiation falling on metal plate is used in the process of bringing the  electron to  the surface and it is called threshold energy . The radiation must have at least this energy to see to it that electrons are ejected .  and the rest of the energy of radiation is used in imparting kinetic energy to the  electron .

The red light radiation has least energy so it is least likely to eject electrons from metal plate and produce photoelectric effect .

3 0
3 years ago
Read 2 more answers
When a substance undergoes a Chemical Change, can the change be reversed? Explain your answer.​
Vinvika [58]

Answer:When a substance undergoes a chemical change some of the chemical changes can be reversed with a chemical change.

Explanation:

A chemical change changes all of the element but some chemical changes but very few can be changed back to its original substance only with a chemical change.

3 0
3 years ago
Read 2 more answers
The source of the sun's heat is A. nuclear fission. B. nuclear fusion. C. nuclear disintegration. D. nuclear separation
ExtremeBDS [4]

✧・゚: *✧・゚:*    *:・゚✧*:・゚✧

                  Hello!

✧・゚: *✧・゚:*    *:・゚✧*:・゚✧

❖ The source of the sun's heat is B. nuclear fusion

~ ʜᴏᴘᴇ ᴛʜɪꜱ ʜᴇʟᴘꜱ! :) ♡

~ ᴄʟᴏᴜᴛᴀɴꜱᴡᴇʀꜱ

5 0
3 years ago
Read 2 more answers
A different student is given a 10.0g sample labeled CaBr2 that may contain an inert (nonreacting) impurity. Identify a quantity
grandymaker [24]

Answer:

Mass of Ca in sample, Mass of Br in sample, Number of moles of Ca in sample, Number of moles of Br in sample, Mass or moles of element other than Ca or Br in sample

Explanation:

The AP Classroom will not count your answer to this question as correct unless it includes at least one of the answers listed above. If you say that theanswer to this question is density, it will be marked as incorrect, I found that out the hard way when I used the answers that brainly gave me.

Good luck,

I applaud you for using the sources avalible to you, which is /definetly not/ cheeting.

8 0
3 years ago
Suppose two scientists perform the same experiment separately, but their results are very different. What could they do to find
Lynna [10]
They should identify the confounding variable.

Some condition that is not examined by the scientist might alter the experiment result. That condition is called confounding variable. If the method of the experiment same but result is very different, there should be unidentified confounding variable. It could be air humidity, temperature, ventilation, light, time of the year or anything that might not be seen by naked eye.
Try to redo the experiment with controlling variable as much as possible.
5 0
3 years ago
Other questions:
  • What is magnetism? please answer
    13·2 answers
  • The warming of the thermosphere (the upper level of the atmosphere) is caused by the photo absorption of high energy photons. On
    10·1 answer
  • You observe a vaporous gas coming off the top of a boiling pot of water. which of the following is a true statement related to t
    15·1 answer
  • Calculate the average atomic mass for the following element given information about the relevant isotopes: (Isotope 1) Mass = 20
    8·1 answer
  • 1
    10·1 answer
  • What is technological design useful for?
    11·1 answer
  • Match the term to the correct definition.
    15·2 answers
  • In the nucleus of an atom, there are 17 protons and 18 neutrons. What is the atomic number? What is the atomic mass? How many el
    7·1 answer
  • Giving brainliest to correct answer..<3please give answers to both
    11·1 answer
  • What is the equation used to calculate the density of a material?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!