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
Akimi4 [234]
3 years ago
12

Physical and chemical change

Chemistry
2 answers:
Greeley [361]3 years ago
5 0
physical change in a substance doesn't change what the substance is. In a chemical change where there is a chemical reaction, a new substance is formed and energy is either given off or absorbed. For example, if a piece of paper is cut up into small pieces it still is paper.
lina2011 [118]3 years ago
5 0

Chemical change: a change that occurs when one substance combines with another substance to make a new substance

Physical change: a change to any physical property of a substance


You might be interested in
Would you expect Nio to dissolve in an aqueous solution of NaNO3?
Doss [256]

Answer:

NiO Does Not Dissolve In An Aqueous Solution Of NaNO3.

Explanation:

6 0
2 years ago
How many moles of argon, Ar, are in 1.31×1024 Ar atoms?
ddd [48]

Answer:

2.18 mol Ar.

Explanation:

Hello there!

In this case, according to the definition of mole as the amount of particles of a given substance, it is possible to introduce the Avogadro's number to assert that 1 mole of any element contains 6.022x10²³ atoms; thus, the moles of Ar in the given amount of atoms turns out to be:

1.31x10^{24}Ar atoms*\frac{1molAr}{6.022x10^{23}atoms}\\\\=2.18molAr

Best regards!

5 0
2 years ago
acid-catalyzed hydration of 1-methylcyclohexene gives two alcohols. The major product does not undergo oxidation, while the mino
noname [10]

Answer:

Major product does not undergo oxidation since it is a tertiary alcohol whereas minor product undergoes oxidation to ketone as it is  secondary alcohol.

Explanation:

Hello,

In this case, given the attached picture, the hydration of the 1 methylcyclohexene yields to alcohols; 1-methylcyclohexan-1-ol and 1-methylcyclohexan-2-ol. Thus, since the OH in the 1-methylcyclohexan-1-ol (major product) is bonded to a tertiary carbon (bonded with other three carbon atoms) it is not able to increase the number of oxygen bonds (oxidation) as it already attained the octet whereas the 1-methylcyclohexan-2-ol (minor product) is able to undergo oxidation to ketone as the carbon bonded to it is secondary (bonded with other two carbon atoms), so one extra bond the oxygen is allowed to be formed to carbonyl.

Best regards.

7 0
3 years ago
What is true about all real machines?
AfilCa [17]

Answer:It is always greater than the actual mechanical advantage because all machines must overcome friction. The mechanical advantage of a machine may be greater than, less than, or equal to 1, depending on the type of machine.

6 0
2 years ago
Why do chemists consider the periodic table so useful?
shusha [124]
Because it puts all known elements in order, both by atomic number and characteristics
6 0
2 years ago
Other questions:
  • Which of the following elements is most likely to form a +1 charge?<br><br>Cl<br>Mg<br>Na<br>Li
    8·2 answers
  • Why do the ocean currents move from the equator towards the poles?
    12·1 answer
  • Write a balanced half-reaction describing the oxidation of aqueous chloride anions to gaseous dichlorine.
    5·1 answer
  • How did the first DNA formed
    12·2 answers
  • Match the following terms with their definitions:
    11·2 answers
  • What was the time frame?
    6·1 answer
  • A student is building an electrical circuit.
    9·2 answers
  • Given that the formula of butane C4H10 the accepted value for the molar mass should be
    11·1 answer
  • What best describes the energy changes associated with evaporation and boiling
    9·1 answer
  • Which of the compounds below will ionize in
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!