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
geniusboy [140]
3 years ago
14

A change where compounds are formed or decomposed is a(n) physical change phase change nuclear change chemical change

Chemistry
2 answers:
dimaraw [331]3 years ago
4 0
It's a chemical change because a new compound is formed
lianna [129]3 years ago
3 0
       Physical change is a change in the shape, velocity, etc.
You might be interested in
|
lilavasa [31]

1.66 M is the concentration of the chemist's working solution.

<h3>What is molarity?</h3>

Molarity (M) is the amount of a substance in a certain volume of solution. Molarity is defined as the moles of a solute per litres of a solution. Molarity is also known as the molar concentration of a solution.

In this case, we have a solution of Zn(NO₃)₂.

The chemist wants to prepare a dilute solution of this reactant.

The stock solution of the nitrate has a concentration of 4.93 M, and he wants to prepare 620 mL of a more dilute concentration of the same solution. He adds 210 mL of the stock and completes it with water until it reaches 620 mL.

We want to know the concentration of this diluted solution.

As we are working with the same solution, we can assume that the moles of the stock solution will be conserved in the diluted solution so:

n_1= n_2  (1)

and we also know that:

n = M x V_2

If we replace this expression in (1) we have:

M_1 x V_1= M_2 x V_2

Where 1, would be the stock solution and 2, the solution we want to prepare.

So, we already know the concentration and volume used of the stock solution and the desired volume of the diluted one, therefore, all we have to do is replace the given data in (2) and solve for the concentration which is M_2:

4.93 x 210 =  620 xM_2

M_2 = 1.66 M

This is the concentration of the solution prepared.

Learn more about molarity here:

brainly.com/question/19517011

#SPJ1

6 0
2 years ago
What kind of bond is present in HCI? (Use the electronegativity values from
Snezhnost [94]
The answer is
D. Covalent bond
Hope this helps you have a great day.
8 0
3 years ago
How many electrons does phosphorous (P) need to gain to have a stable outer electron level?
Brut [27]
The correct answer is 3.
4 0
3 years ago
Read 2 more answers
What is the condition of the outside air at a certain time and place?
11111nata11111 [884]
Weather... weather is the obvious answer 
6 0
3 years ago
Read 2 more answers
If this container of gas is heated,
iogann1982 [59]

Answer:

theory

Explanation:

kinetic theory of gases

5 0
3 years ago
Read 2 more answers
Other questions:
  • How many diatomic molecules are there? List all of them
    5·1 answer
  • Write this numeral in scientific notation.<br><br> 820.5
    10·1 answer
  • The data listed below are for mechanical waves. Which wave has the greatest energy? amplitude = 7 cm; wavelength = 12 cm; period
    14·2 answers
  • Which choice is not an example of a molecule<br><br> Mn<br> O3<br> KOH<br> H2S
    10·2 answers
  • Can someone help me please
    8·1 answer
  • The diagram below shows the movement of Earth plates.
    5·2 answers
  • How many moles are in 1.2x10^3 grams of ammonia, NH3?
    12·1 answer
  • In order to heat a round bottom flask in a heating mantle, plug the heating mantle into _______.Turn the heat up _________, and
    7·1 answer
  • What are other materials found in the earth's crust​
    14·1 answer
  • Chlorine reacts with hydrogen to form hydrogen chloride. As chlorine is more electronegative, it attracts shared paired of elect
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!