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
Nady [450]
2 years ago
8

1. A fire is heating up a pot, which is cooking food. Which part of this reaction is the chemical reaction system?

Chemistry
1 answer:
galben [10]2 years ago
7 0

2. When a fire is burning, chemical energy is turned into visible energy in the form of light and thermal energy in the form of heat.

3. A burning fire is exothermic because a lot of heat is given off as the wood is converted into carbon dioxide and water.

4. Energy is never created but simple recycled and changed into other forms.

You might be interested in
Drag the tiles to the correct boxes to complete the pairs.
Roman55 [17]

Answer:

A = solid

B = liquid

C = plasma

D = gas

Explanation:

A= Particles vibrate in a rigid structure and do not move relative to their neighbors.

It is the property of solid.

Properties of solids:

Solids have definite volume and shape.

In solids molecules are tightly pack and very close to each other.

Their melting and boiling point are every high.

The densities of solids are also very high as compared to the liquid and gas.

There are very strong inter molecular forces are present between solid molecules.

B = it takes the shape of its container but keeps a constant volume.

it is the property of liquid.

Properties of Liquid:

Liquid have definite volume but don,t have definite shape.

Their densities are high as compared to the gases but low as compared to the solids.

In liquid, molecules are close to each other and have greater inter molecular forces as compared to the gas molecules.

C = It is the most common sate of matter in universe.

It is the property of plasma

Plasma

" The ionized gaseous mixture consist of atoms, ions and electrons is called plasma"

The plasma was first time identified by William Crookes in 1879. More than 99% universe matter is consist of plasma.

It is the fourth state of matter, the other three are solid, gas and liquid. The most of matter in the universe is plasma. When heat is supplied to the atoms, they gain energy the electrons in atom thus escape from the atom by gaining the energy and create the positive charge. Thus ions are formed. When heat is constantly supplied, the ionization process continue to take place and produce large number of positive charges, free electrons but some atoms not get ionized and remain neutral. Thus a cloud of free electrons , positive charge and neutral atoms is formed which is called plasma.

D = particles moves rapidly and independent of other particles.

It is the property of gas.

Properties of gases:

Molecule of gases randomly move everywhere and occupy all available space.

Gases don't have definite volume and shape and take the shape and volume of container in which it present.

Their densities are very low as compared to the liquid and solids.

Gas molecules are at long distance from each other therefore by applying pressure gases can be compressed.

The very weak inter molecular forces are present between gas molecules.

6 0
3 years ago
2.How could you identify an element by its<br> number of protons?
kipiarov [429]

Answer:

The number of protons determines an element's atomic number (Z) and distinguishes one element from another. For example, carbon's atomic number (Z) is 6 because it has 6 protons. The number of neutrons can vary to produce isotopes, which are atoms of the same element that have different numbers of neutrons.

8 0
2 years ago
Read 2 more answers
What do we call the stars whose properties follow the patterns?
muminat

Answer:

It is called Asterism.

Explanation:

It is Asterism because Asterism refers to a pattern of stars that are seen in night sky and are very distinctive and identifiable. These group of starts have patterns. It visually seen collection of stars and it's indicate their properties and the lines that connect the stars together. It actually range from small shapes of stars to more complex stars that cover segment of the sky. The stars may be bright naked or have similar brightness.

4 0
2 years ago
Hi can someone please help me find the average for these temperatures? I need them asap
goblinko [34]

Answer:

55 degrees F - cold water

120 degrees F

the last on I don't know

5 0
2 years ago
Which statement best describes London dispersion forces?
sineoko [7]

<span>London dispersion forces is the weakest intermolecular force. It is a temporary force that happens when electrons of two adjacent atoms occupy positions that make atoms form dipoles which are temporary dipoles. This is also referred as dipole-dipole attraction.</span>

7 0
2 years ago
Other questions:
  • Which image(s) would be considered pure substances? A) V B) I and II C) II and IV D) III and V
    14·2 answers
  • Why are low sulfur fuels an advantage to the environment
    13·1 answer
  • In the laboratory a general chemistry student finds that when 2.84 g of KClO4(s) are dissolved in 107.70 g of water, the tempera
    11·1 answer
  • The bond length of the chlorine molecule, Cl2, is 199 pm. On the other hand, a pure carbon structure, such as diamond, has C-C b
    6·1 answer
  • `If you had one test tube containing aqueous AgNO3 and another one containing NH4Cl, and you poured them together into a beaker,
    5·1 answer
  • Which of the following compounds in the main group is a metalloid?
    6·2 answers
  • Calculate the mass of a
    7·1 answer
  • 14. As the temperature of a gas in a closed container increasses, what is true of the particles in the substance? (2 points)
    11·1 answer
  • Select the correct answer.
    8·2 answers
  • Write a well-constructed paragraph on how ionic bonds
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!