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
Citrus2011 [14]
3 years ago
6

A teacher is demonstrating physical and chemical changes to her class. Which action should they use to demonstrate a chemical ch

ange?. Single choice.
(5 Points)

Cutting a piece of paper with scissors.

Ripping a piece of paper with their hands.

Burning a piece of paper with a match.

Folding a piece of paper into an airplane.
Chemistry
1 answer:
olya-2409 [2.1K]3 years ago
5 0
Burning a piece of paper with a match.



Explanation:

A chemical change is something that changes the actual make up of an object. It happens at a chemical level and can only sometimes be observable. For example cutting a paper or folding it is not changing the makeup of the paper, just the shape.
You might be interested in
10. Write the formula for the compounds: copper (1) chloride and copper (II) chloride
Natali [406]

Answer:

Copper(II) chloride (CuCl2) reacts with several metals to produce copper metal or copper(I) chloride (CuCl) with oxidation of the other metal.

Explanation:

3 0
3 years ago
A solid is held in shape by strong forces.
n200080 [17]

Ok thanks for the valuble info.

8 0
3 years ago
Read 2 more answers
What are two properties of most nonmetals?(1) high ionization energy and poor electrical conductivity(2) high ionization energy
elixir [45]
The two properties of most non metals are high ionization energy and poor electrical conductivity. The correct option among all the options that are given in the question is option "1". In general it is known that nonmetals are very poor conductors of heat and electricity. The nonmetals that are solid are normally very brittle and has very little or no metallic luster at all. Nonmetals are highly reactive and show variety of chemical properties. It can also be pointed out that the nonmetals gain electrons very easily.



4 0
3 years ago
A calorimeter contains 100 g of water at 39.8 ºC. A 8.23 g object at 50 ºC is placed inside the calorimeter. When equilibrium ha
Tju [1.3M]
When equilibrium has been reached so, according to this formula we can get the specific heat of the unknown metal and from it, we can define the metal as each metal has its specific heat:

Mw*Cw*ΔTw = Mm*Cm*ΔTm

when 
Mw → mass of water
Cw → specific heat of water
ΔTw → difference in temperature for water 

Mm→ mass of metal
Cw→ specific heat of the metal
ΔTm → difference in temperature for metal

by substitution:

100g * 4.18 * (40-39.8) = 8.23 g * Cm * (50-40)

∴ Cm = 83.6 / 82.3 = 1.02 J/g.°C

when the Cm of the Magnesium ∴ the unknown metal is Mg
6 0
4 years ago
Which of the following could be a long-term health effect of chemical pesticide use?
Helen [10]
The correct Answer for this question is D
3 0
3 years ago
Other questions:
  • When might a technique called water displacement be used?
    5·1 answer
  • 2. What do you get when you add the following
    13·1 answer
  • How are Jupiter and Saturn similar?
    6·2 answers
  • When will a salt become less soluble in water?
    12·2 answers
  • ASAP PLEASE
    9·2 answers
  • 18. An example of an atom that has no
    12·2 answers
  • How many moles are found in a 100.0 g sample of CuF2?
    8·2 answers
  • What type of energy warms earths surface?
    10·1 answer
  • Explain what would be the best observation when sodium chloride and sodium sulphate solutions are mixed​
    9·1 answer
  • Create a list of 5 potential jobs that students of astronomy can obtain.
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!