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
Reil [10]
3 years ago
9

Which statement best describes a physical change?

Chemistry
1 answer:
worty [1.4K]3 years ago
3 0

C because it is only the chemical reaction which remain the same

You might be interested in
What kind of intermolecular forces act between two ammonia molecules
iragen [17]

Answer:

extensive hydrogen bonding

Explanation:

The high boiling points of water, hydrogen fluoride (HF) and ammonia (NH3) is an effect of the extensive hydrogen bonding between the molecules. The London dispersion force is caused by random and temporary changes in the polarity of atoms, caused by the location of the electrons in the atoms' orbitals.

Hope this helps :)

6 0
2 years ago
help, Look at the model below. Explain what is correct and/or incorrect about the model based on scale, proportion, and quantity
stiks02 [169]
One correct thging is that there are the same amount of positive and negative atoms
6 0
2 years ago
P-fluoroanisole reacts with sulfur trioxide and sulfuric acid. Draw the major product of this substitution reaction; if applicab
Ipatiy [6.2K]

Answer: (Structure attached).

Explanation:

This type of reaction is an aromatic electrophilic substitution. The overall reaction is the replacement of a proton (H +) with an electrophile (E +) in the aromatic ring.

The aromatic ring in p-fluoroanisole has two sustituents, an <u>halogen</u> and a <u>methoxy group</u>, which are <em>ortho-para</em> directing substituents.

Aryl sulfonic acids are easily synthesized by an electrophilic substitution reaction aromatic using <u>sulfur trioxide as an electrophile</u> (very reactive).

The reaction occurs in three steps:

  1. The attack on the electrophile forms the sigma complex.
  2. The loss of a proton regenerates an aromatic ring.
  3. The sulfonate group can be protonated in the presence of a strong acid (H₂SO₄).

Normally, a mixture of <em>ortho-para</em> substituted products would be obtained. However, since both <em>para</em> positions are occupied, only the <em>ortho </em>substituted product is obtained here.

8 0
3 years ago
Which best describes teratogen
Readme [11.4K]
A teratogen is an exposure (substance, organism or process) in pregnancy that has a harmful effect on the fetus. Teratogens can be diseases, medications, drugs and environmental exposures.
6 0
3 years ago
3. What determines the mass number of an element?<br> The mumhor of nrotons
ArbitrLikvidat [17]

Answer: The number of protons and the number of neutrons determine an element's mass number.

Explanation:

5 0
3 years ago
Read 2 more answers
Other questions:
  • What natural method of separating mixtures happens in reservoirs over a long period of time?
    8·1 answer
  • _____ might be able to detect tumors based on its use of X-rays and ability to produce cross-sectional images of the brain.
    9·1 answer
  • A person uses 770 kcal on a long hike. Calculate the energy used for the hike in each of the following energy units.
    9·1 answer
  • Consider the following intermediate chemical equations.
    9·1 answer
  • How many moles are in 8.0 gram sample of C3H4
    7·1 answer
  • Define covalent bond.
    10·2 answers
  • GIVING BRAINLYYY
    13·1 answer
  • How many kilo joules of heat are required to the decompost 1.96 mol Nah I 3(s)
    12·1 answer
  • Detailed description of how group 1 atoms bond with group 7 atoms​
    5·1 answer
  • Difference between saturated unsaturted and supersaturatted
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!