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
Vilka [71]
2 years ago
6

A teacher wants to perform a classroom demonstration that illustrates both chemical and physical changes. Which would be the bes

t demonstration that she could use?
Chemistry
1 answer:
Jlenok [28]2 years ago
5 0

when you crumble paper is still paper when you burn down paper you get ashes. that is want is call chemical and physical changes.

You might be interested in
Energy is transferred thru heat by each of the following methods EXCEPT?
Softa [21]
It doesn't transfer through Thermalizing
5 0
2 years ago
Read 2 more answers
Do you think it is appropriate to have diet pop available in your school?
pashok25 [27]

Answer:

I think so

Explanation:

It would provide an extra energy boost with lower sugars. Students bring drinks to school anyways so it would be nice to offer some that aren't as detrimental.

3 0
3 years ago
What are all the ways that you think knowing about the flow of energy might be useful in
Kaylis [27]

Yes the main benifit can be recyclation of energy

  • The example can be seen in powerbanks or inverters
  • The chemical energy present inside the battery can be used to convert itself into electric energy.
  • Which can help us in climate protection
4 0
2 years ago
By studying fossils, scientists get an idea of ....
Tema [17]
<span>By studying fossils, scientists get an idea of what the organisms looked like, what they ate, and how they lived. </span>
6 0
2 years ago
Element X has the following valence electron configuration: [core]ns2np5. Element M has the following valence electron configura
alex41 [277]

Answer:

The kind of ionic compound formed is MX2.

Explanation:

Element X electron  configuration is represented as [core] ns2np5. The group in the periodic table this element belong to is group 7A.  The element group is called the halogen family. Element X cannot be stated specifically, because the number is represented with n.  Element X will behave as an anions when it react with a metal(cations). Element X has a charge of -1. The element X will gain electron when it bond with a metal. Element X is a non metal . Elements  in this group are fluorine, chlorine, bromine, iodine , astatine, and tennessine . The element X have 7 valency electrons.

Element M electronic configuration is represented as  [core]ns2. The group in the periodic table this element belong to is group 2A . The element  group is called the alkaline earth metals family . Element M will behave as a cation when it bond with a non metal. Element M is a metal , therefore it will likely lose electron to form cations during bonding . The charge of element M is 2+. Element M is positively charged. Elements that belong to this group includes beryllium, magnesium, calcium, strontium, barium and radium.  Element M has 2 valency electrons.

The reaction between this 2 ions will likely form an ionic compound . The element M is the cations while the element X is the anions. The element M will lose 2 electron while 2 atoms of element  X will gain 2 electrons.Element M will lose 2 electron to attain a stable configuration while 2 atoms of element X will gain a single electron each to attain a stable configuration.

M²+ and F- . This will form MX2 when you cross multiply the charge. The kind of ionic compound formed is MX2.

6 0
3 years ago
Other questions:
  • One characteristic of a scientific theory is that____
    5·1 answer
  • The element, boron, is represented by which of the following chemical symbols? Be Br B Ba
    14·2 answers
  • Which of the following elements has the highest first ionization energy: Na, Mg, S or Cl?
    12·1 answer
  • To convert between moles and molecules, you need to...
    13·1 answer
  • Is Weight Measurement a phenomenon?
    10·2 answers
  • 1.54 inches = millimeters
    10·1 answer
  • Which of the following is not the same as 2.97 milligrams a)0.0000297 kg b)0.00297 g or d)0.297cg
    12·2 answers
  • Consider an ideal gas contained in a cylinder with the volume 34.4L, temperature 667K and pressure 2atm.What will be pressure of
    7·1 answer
  • Atoms are composed of subtomatic particles called
    8·1 answer
  • Type the correct answer in the box. Isopropanol (C3H8O) is a key ingredient in some hand sanitizers. Suppose that 127 grams of i
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!