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
postnew [5]
3 years ago
5

Here this is a clearer photo so what should I do

Chemistry
1 answer:
uysha [10]3 years ago
8 0
What part of chemistry is this
You might be interested in
The electronic arrangement of an atom shows how electrons are distributed across the different energy levels. Which of the follo
bazaltina [42]

Answer:

The answer is D which is Selenium

5 0
2 years ago
8. Classify each of the following changes as physical or chemical: (a) coal burning (b) ice melting (c) mixing chocolate syrup w
IrinaK [193]

Answer:

(a) coal burning: chemical change

(b) ice melting: physical change

(c) mixing chocolate syrup with milk : physical change

(d) explosion of a firecracker: chemical change

(e) magnetizing of a screwdriver: physical change

Explanation:

A physical change changes the physical form or the appearance or the property of the substance, but the chemical composition of the matter remains the same. Such a change is reversible in nature.  

Whereas; a chemical change involves a chemical reaction, resulting in the change in the chemical composition of the matter. A chemical change results in the formation of a new substance and is generally irreversible in nature.

(a) coal burning: It is a chemical change because the combustion of coal changes its chemical composition. When coal (carbon) is burned carbon dioxide is released. Irreversible in nature

C(s) + O_{2}(g)\rightarrow  CO_{2}(g)

(b) ice melting: It is a physical change because ice the solid phase of water melts to get converted to the liquid phase of water only and no change in the chemical composition is seen.

H_{2}O(s) \overset{\Delta }{\rightarrow} H_{2}O(l)

(c) mixing chocolate syrup with milk : It is a physical change because on dissolving chocolate syrup in milk, only the color of the milk changes, therefore there is change in the property. As, it involves mixing of two miscible liquids and does not involve any change in the chemical composition of either of the two liquids.

(d) explosion of a firecracker: it is a chemical process, as it involves combustion of an explosive material to produce carbon dioxide, carbon monoxide and water vapour. It is a chemical change because it involves change in the chemical composition. Irreversible in nature

(e) magnetizing of a screwdriver: It is physical change because on magnetization only the magnetic property of the screwdriver changes AND there is no change in the chemical composition of the matter.

6 0
3 years ago
:answer question number 5
In-s [12.5K]

Answer:

it is simple true and thanks for point

3 0
2 years ago
Read 2 more answers
Why is copper a popular mineral? Is it in danger of depletion? Use details to support your answer.
laila [671]

Answer:

yes it is a danger.Copper doesn't break down in the environment, leading to its accumulation in plants and animals. Absorption of some copper into the body is essential for human health. Acute industrial exposure to copper fumes, dusts or mists can result in chronic copper poisoning.Copper is a mineral and an element essential to our everyday lives. It is a major industrial metal because of its high ductility, malleability, thermal and electrical conductivity and resistance to corrosion. It is an essential nutrient in our daily diet.

7 0
3 years ago
What two terms are used to describe the temperature at which solids and liquids of the same substance exist at the same time?
goldenfox [79]

Answer:

The answer is melting and freezing point.

Explanation:

5 0
2 years ago
Other questions:
  • 5. Consider the process where nA mol of gas A initially at 1 bar pressure mix with nB mol of gas B also at 1 bar to form 1 mol o
    5·1 answer
  • Of the atoms listed below, which one will have at least one electron in its d orbital?
    9·1 answer
  • What is the total number of electrons shared in the bond between two carbon atoms in a molecule?
    9·1 answer
  • Which object would a geologist date using carbon-14 dating?
    11·2 answers
  • When paper is burned, the mass of the remaining ash is less than the mass of the original paper.
    6·1 answer
  • How many carbons atoms are in propane?
    8·2 answers
  • The net ionic eq for Br ^+2 changes onto BrCrO4 in the presence of
    15·1 answer
  • What is one effect of the uneven heating of Earth caused by the Sun? (Answer with a 5 sentence paragraph)
    13·1 answer
  • Conservation Models Activity
    10·1 answer
  • Why does nonmetallic elements pull elements from metallic elements so effectively during a reaction?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!