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dalvyx [7]
2 years ago
7

How is a telephone an example of both science and technology?

Chemistry
1 answer:
shtirl [24]2 years ago
6 0
It is a part of science because it was an invention that was made and inventions are because of science and it’s a technology because it is electrical
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How can you distinguish between a physical change and a chemical change?
AleksAgata [21]

Answer:

Physical Change

  • When a substance undergoes a physical change, its composition remains the same despite its molecules being rearranged.
  • Physical change is a temporary change.
  • A Physical change affects only physical properties i.e. shape, size, etc.
  • A physical change involves very little to no absorption of energy.
  • Some examples of physical change are freezing of water, melting of wax, boiling of water, etc. .
  • In a physical change, no new substance is formed.
  • Physical change is easily reversible i.e original substance can be recovered.

Chemical Change

  • When a substance undergoes a chemical change, its molecular composition is changed entirely. Thus, chemical changes involve the formation of new substances.
  • .A chemical change is a permanent change.
  • Chemical change both physical and chemical properties of the substance including its composition
  • During a chemical reaction, absorption and evolution of energy take place.
  • A few examples of chemical change are digestion of food, burning of coal, rusting, etc.
  • A chemical change is always accompanied by one or more new substance(s).
  • Chemical changes are irreversible i.e. original substance cannot be recovered.
8 0
3 years ago
The particles in a ____________________ have an orderly, fixed arrangement.
amid [387]
The particles in a solid have an orderly, fixed arrangement.
8 0
3 years ago
What mass of CaCl2 (in g ) should the chemist use?
solmaris [256]

The mass of the solute required is 250.25 g.

<h3>What is the mass of the solute?</h3>

We know that the number of moles of the solute can be used to obtain the mass of the solute that is  required. We can now try to find the mass of the solute that is required.

Concentration of the solution = 0.350M

Volume of the solution = 6.5 L

Number of moles of the solute = 0.350M *  6.5 L

= 2.275 moles

We now have the mass of the solute as;

2.275 moles  * 110 g/mol

= 250.25 g

Th measured mass of the solute that we would have to use is 250.25 g.

Learn more about solute:brainly.com/question/7932885

#SPJ1

Missing parts;

A chemist wants to make 6.5 L of a .350M CaCl2 solution. What mass of CaCl2(in g) should the chemist use?

3 0
1 year ago
Fake answers will get your account banned. I need help please.
Nookie1986 [14]

The option that would be appropriate to model nuclear fission is disturbing a drop of water such that it breaks into smaller droplets

Nuclear fission refers to the splitting of a heavy nucleus into lighter nuclei owing to the bombardment of small particle.

The liquid drop model provides the most apt model for describing the concept of nuclear fission. In nuclear fission, the nucleus breaks due to the increase in repulsion between the nuclear charges.

As the size of the nucleus continues to increase, any little disruption will; result in the breaking up of the nucleus into smaller fragment called daughter nuclei.

Hence, the model of disturbing a drop of water such that it breaks into smaller droplets is the most apt description of nuclear fission.

Learn more: brainly.com/question/13440572

5 0
3 years ago
Read 2 more answers
Name a non metal which conducts electricity
Nuetrik [128]

Answer:

Graphite

Graphite is a non-metal and it is the only non-metal that can conduct electricity.

8 0
2 years ago
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