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
Softa [21]
3 years ago
7

1.

Chemistry
2 answers:
Tresset [83]3 years ago
6 0

Answer:

A sample of water boils and releases gas.

Explanation:

Physical change is a change where no any chemical reaction takes place only the chemical composition of matter changes. It is a reversible process .

Burning of newspaper, rusting of iron, plant changes carbon dioxide and water into sugar (photosynthesis) are  chemical reaction and irreversible process.

ivann1987 [24]3 years ago
4 0

Answer:  A sample of water boils and releases gas.

Explanation: When water boils it evaportates but it is still water so this is a psysical change

Hope this helps !

You might be interested in
What happens when an electron jumps energy from energy level 3 energy level 6 in an atom
Alik [6]

Explanation:

high energy to Low energy

=the electron gains energy (K.E)

4 0
2 years ago
Is it posible Count a grain of sand?explain
Alla [95]

Answer:

Yes

Explanation:

As long as its a solid, you can count it. It will be hard, but possible.

5 0
3 years ago
If heat transfers from the system (solute) to the surroundings (solvent), then AH is
balu736 [363]

Answer:

B) exothermic.

Explanation:

Hello!

In this case, we need to keep in mind that exothermic reactions release heat, so they increase the temperature as the final energy is less than the initial energy; in contrast, endothermic reactions absorb heat, so they decrease the temperature as the final energy is greater than the initial energy.

In such a way, when a dissolution process shows off a negative enthalpy of dissolution, we infer it is an exothermic process due to the aforementioned; therefore, the answer is:

B) exothermic .

Best regards!

3 0
3 years ago
Which subatomic particle is located outside the nucleus
Mrac [35]
Electrons is located outside the nucleus
5 0
3 years ago
Which process is happening in the reaction that is shown
erastova [34]
I believe it’s B I apologize if it’s wrong
4 0
3 years ago
Other questions:
  • Arrange the ions N3-, O2-, Mg2 , Na , and F- in order of increasing ionic radius, starting with the smallest first. Arrange the
    14·1 answer
  • please i really need help, i dont understand any of this, if you could do the work for all and show me how to do it that would b
    5·1 answer
  • Given that mass was lost from the copper (ii) carbonate hydroxide hydrate during heating, in this decomposition reaction, how ma
    5·1 answer
  • What is starch test?​
    15·2 answers
  • How does thermal energy transfer when a room is heated by a furnace?
    5·1 answer
  • a helium filled balloon has a volume of 208 l and it contains 9.95 moles of gas. if the pressure of the balloon is 1.26 atm dete
    9·1 answer
  • Complete the chart
    15·1 answer
  • Relative Dating Using Index Fossils
    10·1 answer
  • Mg (s) + 2 HCl (aq) --> MgCl2 (aq) + H2 (g)
    13·1 answer
  • What is electron configuration of oxygen in its excited state​
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!