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
taurus [48]
3 years ago
8

True or False. Physical changes result in the formation of a new substance.

Chemistry
1 answer:
Umnica [9.8K]3 years ago
3 0

Answer:

1. false

2. true

Explanation:

I hope this helps

You might be interested in
Calculate the formula for the following hydrate composed of 76.9% CaSO3 and 23.1%H2O
artcher [175]
Assume there is 100g of the substance at first

5 0
3 years ago
Read 2 more answers
If the a of a monoprotic weak acid is 2. 6×10−6, what is the ph of a 0. 33 m solution of this acid?
yawa3891 [41]

The pH of the monoprotic weak acid is 2.79.

<h3>What are weak acids?</h3>

The weak acids are the acids that do not fully dissociate into ions in the solution. Strong acids fully dissociate into ions.

The chemical reaction is HA(aq) ⇄ A⁻(aq) + H⁺(aq).

c (monoprotic acid) = 0.33 M.

Ka = 1.2·10⁻⁶

[A⁻] = [H⁺] = x

[HA] = 0.33 M - x

Ka = [A⁻]·[H⁺] / [HA]

2. 6 × 10⁻⁶ = x² / (0.33 M - x)

Solve quadratic equation: [H⁺] = 0.000524 M.

pH = -log[H⁺]

pH = -log(0.000524 M)

pH = 2.79

Thus,  the pH of the monoprotic weak acid is 2.79

To learn more about weak acids, refer to the below link:

brainly.com/question/13032224

#SPJ4

5 0
2 years ago
What happens to an electromagnetic wave as it passes from space to matter
Angelina_Jolie [31]
<span>When an electromagnetic wave passes from space to matter, some part of the energy is absorbed by the matter and it increases its energy. The wave may reflect and some part may pass through the matter depending on the amount of energy they have. The amplitude of the wave decreases if some parts of it are reflected. </span>
8 0
3 years ago
What happens to the sound wave in echolocation?
Andrei [34K]
Answer: Reflected :)
5 0
3 years ago
Name the process by which the ammonia and hydrogen Chlorade<br> gass<br> nove in the tube-
____ [38]

Explanation:  Process is diffusion. The gas molecules follow a zig-zag path through the tube as they collide with the air molecules in the tube. The purpose of the glass tube is to eliminate air currents and to see if the gas molecules will move on their own.

<u><em>I guess this helped you</em></u>

<em><u>I hope you would mark me as BRAINLIEST!!</u></em>

8 0
3 years ago
Other questions:
  • When a person looks at a bright light, tiny muscles in the eye contract so less light can enter the eye.
    9·2 answers
  • In order for a chemical reaction to take place, what MUST ALWAYS occur?
    7·1 answer
  • Explain how information from stimuli becomes a memory
    10·1 answer
  • I just want to know the answer
    10·2 answers
  • When gas changes to liquid is it gaining or loosing energy?
    5·2 answers
  • What was the name of yesterday's supermoon​
    6·1 answer
  • Arenediazoniums can undergo electrophilic aromatic substitutions with a wide variety of activated aromatic compounds to yield ne
    5·1 answer
  • Defenses such as your skin respiratory system, digestive and circulatory system
    15·2 answers
  • Consider the molecular structure for linuron, an herbicide, provided in the questions below. How many pi bonds are in the molecu
    8·1 answer
  • According to the iupac convention, alkyl substituents on a hydrocarbon chain should be listed in which order?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!